LXi.pdf

HiSpeed LX/i0459

*

Operator Manual

2295148–100

Revision 0Original Draft in English

Copyright 2001by General Electric Company

WARNING

X–RAY EQUIPMENT IS DANGEROUS TO BOTH PATIENT AND OPERATORUNLESS MEASURES OF PROTECTION ARE STRICTLY OBSERVED

Though this equipment is built to the highest standards of electrical and mechanical safety, the useful x–ray beam becomesa source of danger in the hands of the unauthorized or unqualified operator. Excessive exposure to x–radiation causes damageto human tissue.

Therefore, adequate precautions must be taken to prevent unauthorized or unqualified persons from operating this equipmentor exposing themselves or others to its radiation.

Before operation, persons qualified and authorized to operate this equipment should be familiar with the Recommendationsof the International Commission on Radiological Protection, contained in Annals Number 26 of the ICRP, and with applicablenational standards.

iCT HiSpeed LX/i Operator ManualDir. 2295148–100Rev. 0

Regulatory Requirements

This product complies with regulatory requirements of the following:

� European Directive 93/42/EEC concerning medical devices 0459

The configurations delivered:

– without any option or accessory,or

– exclusively with one or several options and/or accessories listedbelow, have been declared in compliance with the EuropeanDirective 93/42/EEC and therefore bear the CE marking:

� Green QSD 1990 Standard issued by MDD (Medical Devices Director-ate, at the UK Department of Health).

� Medical Device Good Manufacturing Practice Manual issued by theFDA (Food and Drug Administration, United States Department ofHealth).

� Requirements from Underwriters Laboratories, Inc. (UL), independentlaboratory.

� Requirements from Canadian Standards Association (CSA).

� Requirements from the International Electrotechnical Commission(IEC), international standards organization.

General Electric Medical Systems, the manufacturer of this product, is ISO9001 certified.

iiCT HiSpeed LX/i Operator Manual

Dir. 2295148–100Rev.0

EMC Performance

This CT system may characteristically cause electromagnetic interferencewith other equipment, either through air or connecting cables. The term EMC ( ElectroMagnetic Compatibility ) means the capability of theequipment, which curbs electromagnetic influence from other equipmentand at the same time does not affect other equipment with similar electro-magnetic radiation from itself. This product is designed to fully comply withthe group 1 EN60601–1–2 ( IEC60601–1–2 ), Class A, in EMC regulations.In terms of EMC performance, limit value 12dB relaxation in electromagnet-ic interference of permanently–installed medical system used in a lead–shielded area, is applied to this product.

Notice upon Installation of the Product

� Locate the equipment as far as possible from other electronic equip-ment.

� Be sure to use either any cables provided by GEYMS or ones desig-nated by GEYMS. Wire these cables following these installation proce-dures.

General Notice

� Designation of Peripheral Equipment Connectable to This Product

Avoid using other equipment than designated. Failure to comply with thisinstruction may result in poor EMC performance of the product.

� Notice against User Modification

Never modify this product. Unilateral user modification may cause degrada-tion in EMC performance. Modifications of product include ;

� Changes in cable ( length, material, wiring etc.)

� Changes in system installation/layout

� Changes in system configuration/components

� Changes in means of fixing the system/parts ( cover open/close,cover screwing )

� Operate the system with all covers closed. If you open any cover forsome reason, be sure to shut it before starting/resuming operation.Operating the system with any cover open could affect EMC perfor-mance.

iiiCT HiSpeed LX/i Operator ManualDir. 2295148–100Rev. 0

Countermeasures against EMC–related Issues

Generally it is pretty difficult to grapple with EMC–related issues.It may take much time and cost.

General countermeasures

Electromagnetic interference with other equipment

� Electromagnetic interference may be alleviated by positioning otherequipment far from the system.

� Electromagnetic interference could be mitigated by changing therelative location/installation angle between the system and otherequipment.

� Electromagnetic interference may be eased by changing wiringlocations of power/signal cables of other equipment.

� Electromagnetic influence could be reduced by altering the path ofpower supply for other equipment.

Notice on Service

� Ensure all screws are tight after servicing. Loose screws may cause the degradation in EMC performance.

� In case the high frequency gasket of this system is broken, replace itwith a new one immediately.

ivCT HiSpeed LX/i Operator Manual

Dir. 2295148–100Rev.0

Blank page.

Safety

vCT HiSpeed LX/i Operator ManualDir. 2295148-100Rev. 0

Safety !

WARNING!

FAILURE TO FOLLOW THE OPERATING INSTRUCTIONS ANDSAFETY PRECAUTIONS COULD RESULT IN INJURY TO THEPATIENT, YOURSELF, OR OTHERS.

General Safety

� Keep the patient in view at all times. Never leave the patient unattended.Always stay alert to safety concerns involving the patient’s condition andequipment operation.

� Check the lengths of all patient health lines (IV tubing, oxygen lines, etc.) andmake sure they accommodate cradle travel. Position these lines so theycannot catch on anything within the patient vicinity or between the table andgantry during cradle travel or gantry tilt.

� Always follow the exam procedures provided in the operator manual. Verifycorrect entry of identification, patient positioning, and other patient databefore proceeding with the exam. Incorrect procedures or patient data entrycould cause misinterpretation of the exam results.

� Conduct Image Quality checks and follow the maintenance schedule outlinedin your HiSpeed LX/i operator manual. Discontinue use of the equipmentwhenever you notice equipment damage, or a malfunction occurs. Do notuse the equipment until qualified service personnel correct the problem.Never use the equipment unless all the protective covers are in place.

Radiation Safety

� Use of controls or adjustments, or performance of procedures other thanthose specified herein may result in hazardous radiation exposure.

� Always use proper technique factors for each procedure to minimize X–Rayexposure while still producing the best diagnostic results.

� Be sure to have an operator wear X–ray protection vest when a work isneeded near the gantry while X–ray is being emitted.

Safety

viCT HiSpeed LX/i Operator Manual

Dir. 2295148-100Rev. 0

Mechanical Safety

� Never open, or remove, the gantry covers. (Only qualified service personnelshould remove covers.)

� Do not enter the scan room when the gantry covers have been opened orremoved. Never allow a patient or staff member to enter the scan room whenthe gantry covers have been removed for maintenance or PM. (Never allowanyone but qualified service personnel to enter the scan room during gantrymaintenance or PM.)

� To prevent the pinching or crushing of extremities, keep hands and feet awayfrom the edge of the moving table top/cradle and its surrounding equipment.(Be especially careful when positioning patients who weigh more than 250pounds.)

� Physically assist all patients on and off the table, and into position on thecradle.

� While a patient is being loaded onto a CT table from a gurney, make sure viathe following measures that the gurney NEVER moves.

� Lock all the casters of the gurney.

� Hold the gurney very firmly.

If the gurney moves while loading a patient, it may create a gap between thetable and the gurney posing the danger of the patient falling through the gap.

� Return the gantry to the 0� upright position, latch the table, and set it at acomfortable height for patient loading and unloading.

� Avoid any patient contact with the CT gantry during gantry tilt and cradlemovement (manual or software driven). Once again, pay close attention tolarge patients; make sure you don’t pinch skin or extremities between thecradle and the gantry.

� The concentrated weight of short, heavy patients can cause the cradle tomake contact with the gantry. Make sure you don’t drive the cradle into thegantry cover, and make sure you don’t pinch skin or extremities between thecradle and the gantry.

� Check the lengths of all patient health lines (IV tubing, oxygen lines, etc.) andmake sure they accommodate cradle travel. Position these lines so theycannot catch on anything within the patient vicinity or between the table andgantry during cradle travel or gantry tilt.

Safety

viiCT HiSpeed LX/i Operator ManualDir. 2295148-100Rev. 0

� Do not use the table base as a foot rest. You could entrap and injure yourfoot while lowering the table.

� Don’t place your hands inside the gantry cover when tilting the gantry.The gantry can pinch or crush your hands!

� Only use the cradle extender to support the patient’s head or feet during ascan study. The cradle extender supports up to 75 pounds; the head holdersupports up to 30 pounds. Neither device supports the full weight of apatient. If you sit, stand or otherwise apply excessive pressure to thesedevices, they will break or come off the cradle, and may cause injury.

� Periodically check all accessories for damage and remove from service ifdamaged or cracked. Also check the accessory attachment plate fixed to theend of the cradle. Repair or replace if loose or damaged.

� The cradle has a maximum distributed load capacity of 450 lb. (205 kg).GE assures incremental accuracy and normal traverse speeds up to 300pounds. Exceeding the 450 lb. (205 kg) maximum limit could result indegraded positioning performance, increased table lowering speed,equipment damage and/or injury.

Safety

viiiCT HiSpeed LX/i Operator Manual

Dir. 2295148-100Rev. 0

Electrical Safety

� Avoid all contact with any electrical conductors.

� Wait at least 10 minutes after the last scan before you turn off [Main Power].This gives the circulating oil sufficient time to cool the X–Ray tube.

Laser Beam Safety

� The laser beam used for patient positioning can cause eye injuries.Instruct a patient not to stare into the laser beam.

Software Safety

� Should a malfunction occur, or a patient condition develop that requires

interrupting a scan series, push (Abort) on the right end of the OC scan

panel to stop X–Ray.

� Wait for image annotation to complete before filming. If you press theexposure button too soon, the film records a composite of two different scans.

� DICOM protocol has a “dialect”, which may cause some troubles likedisappearances of some portion of image annotations, when connecting tothe station where data transfer is not confirmed.

Emergency Stop

� In the event of a hardware failure that could cause serious damage, such as

smoke, fire or unintentional cradle movement, press one of the red [Emergency Stop] switches located on the operator console, at the gantrycontrol panels, or on the X–ray Generator. Low power to the electroniccomponents in the computer and data acquisition system remains ON.

� When Emergency Stop is applied, the moving cradle and tilting gantry mayoverrun by less than 10 mm and less than 0.5 degrees, respectively.

GE provides training support. Contact your local GE salesrepresentative to arrange training sessions to meet your needs.

Safety

ixCT HiSpeed LX/i Operator ManualDir. 2295148-100Rev. 0

Radio Waves Safety

Never use the following devices near this equipment.Use of these devices near this equipment may induce erratic function of the equipment.

Devices not to be used near this equipment

Devices which intrinsically transmit radio waves such as;cellular phone, transceiver, mobile radio transmitter and radio–controlled toy,etc.

Keep those devices power–off near this equipment.

Medical staff in charge of this equipment is required toinstruct technicians, patients and other people who may bearound the equipment to fully comply with the aboveregulation.

Your system also has a warning label on a console thatwarns of the above hazard.

NOTE�

NOTE�

Safety

xCT HiSpeed LX/i Operator Manual

Dir. 2295148-100Rev. 0

Warning Labels

Labels on Keyboard

� The following labels are attached to the upper side of the keyboard.

Patient may be pinched between gantry and table duringPrescribed Tilt. To avoid pinching, before using PrescribedTilt, make sure that patient does not contact the gantry.

CAUTION

Press Stop Scan button to stop cradle motion or scanning.

CAUTION

This X–ray unit may be dangerous to patient and operatorunless safe exposure factors and instructions are observed.

WARNING

Safety

xiCT HiSpeed LX/i Operator ManualDir. 2295148-100Rev. 0

Laser Alignment Light Caution/Warning

The HiSpeed system employs semiconductor laser alignment lights for patientlandmarking. This type of alignment light casts a thin red light on the patientfor the purpose of positioning and landmarking.

� The following label is attached at five locations of the gantry aperture.

LASER APERTURE

DO NOT STAREINTO BEAM

� The following labels are attached to the lower part of the gantry front cover.

LASER RADIATIONDO NOT STARE INTO BEAM

600–700nm LASER DIODE1 MILLIWATT MAXIMUM OUTPUT

CLASS 2 LASER PRODUCTIEC 825–1:1993

LASER RADIATIONDO NOT STARE INTO BEAM

600–700nm LASER DIODE1 MILLIWATT MAXIMUM OUTPUTCLASS II LASER PRODUCT

CAUTION: Exposing eyes to the laser alignment lights may result in eye injury.

Do not stare directly into the laser beam.

Instruct patients to close their eyes during landmarking to avoideye exposure to the alignment light while laser light is on.

Closely monitor all patients and prevent them from accidentallystaring into the beam.

Do not leave the laser beam on after you position the patient.

Safety

xiiCT HiSpeed LX/i Operator Manual

Dir. 2295148-100Rev. 0

� The following label is attached at the rear side of the gantry pedestal.

MADE FOR GENERAL ELECTRIC CO.MILWAUKEE, WISCONSIN BY

GE YOKOGAWA MEDICAL SYSTEMS, LTD7–127 ASAHIGAOKA 4–CHOME, HINOSHI, TOKYO, JAPAN

MODEL xxxxxSERIAL yyyyyMANUFACTURED n month, 19xx CLASS 1

SOURCE: 90A/380–480V3~ 50/60HzSOURCE: 30A/200V~ 50/60HzSOURCE: 30A/115V~

~50/60Hz

SOURCE: 15A/115V 50/60Hz

COMPLIES WITH RADIATIONPERFORMANCE STANDARDS, 21 CFR SUBCHAPTER J

CAUTION : Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Safety

xiiiCT HiSpeed LX/i Operator ManualDir. 2295148-100Rev. 0

Information of Laser Alignment Lights Beam

Beam source location

The following diagram shows the locations of the laser beam source, A, B, C,D, E, F, G and H.

PositioningLight C, F

PositioningLight A, D

Gantry Front

PositioningLight B, E

G H

X–axis direction

Y–axisdirection

External plane

Scan plane

Gantry front cover

Light A Light C

90 deg.

Beam radiation area

X–axis View

Gantry front cover

90 deg.

Safety

xivCT HiSpeed LX/i Operator Manual

Dir. 2295148-100Rev. 0

Scan plane

Gantry front cover

Light B

90 deg.

Y–axis View

External plane

Gantry front cover

Beam radiation area

4 deg.

Front View

Light D

Light F

80 deg.80 deg.

Beam radiation area

External plane

Safety

xvCT HiSpeed LX/i Operator ManualDir. 2295148-100Rev. 0

3 deg.

Front View

Light E

90 deg.

Beam radiation areaExternal plane

Front View

Light G 90 deg.

Beam radiation area

Light H90 deg.

55 deg. 35 deg.

Scan plane

Safety

xviCT HiSpeed LX/i Operator Manual

Dir. 2295148-100Rev. 0

Cradle Caution

� The following label is attached to the end of the cradle.

Do not grasp the side of the cradle.

CAUTION

Accessory Caution

� The following labels are attached to the standard headholder and shallowhead holder.

Accessory may fall and cause injury if not latched tocradle. Make sure that accessory is latched to underside ofcradle.

CAUTION

Excessive weight can break accessory and cause injury.Do not load more than 34 Kg or 75 pounds.

CAUTION

Safety

xviiCT HiSpeed LX/i Operator ManualDir. 2295148-100Rev. 0

� The following labels are attached to the coronal headholder.


CAUTION


CAUTION

Do not hit the accessory against the gantry. Patient injuryor equipment damage could result.

CAUTION

� The following labels are attached to the cradle extender.


CAUTION


CAUTION

Safety

xviiiCT HiSpeed LX/i Operator Manual

Dir. 2295148-100Rev. 0

Radio Wave Caution

� The following label is attached to the operator console.

Do not use the following devices near this equipment.Cellular phone, radio transceiver, mobile radio transmitter,radio–controlled toy, etc.

CAUTION

Use of these devices near this equipment could cause thisequipment to perform outside the published specifications.

Keep power to these devices turned off when near thisequipment.

Safety

xixCT HiSpeed LX/i Operator ManualDir. 2295148-100Rev. 0

Precaution for The CT System Disposal

The elimination of machines and accessories must be in accordance withnational regulations for waste processing.

In the CT system there are certain materials used that could causeenvironmental hazards if disposed of improperly. Those materials include leadblocks in the gantry and oil in the tank and the X–ray tube. Be sure to contactGEMS service personnel prior to disposing of the CT system or any CTcomponent to ensure safe and proper disposal.

Packing Materials

The materials used to pack our equipment are recyclable. They must becollected and processed in accordance with the regulations in force for thecountry where the machines or accessories are unpacked.

Safety

xxCT HiSpeed LX/i Operator Manual

Dir. 2295148-100Rev. 0

Technical documents

GE will provide CT users with the following documents at their request to helpthem repair malfunction on their own.

� Diagrams

� Components part lists

� Descriptions

� Calibration instructions

iCT HiSpeed LX/i Operator ManualDir. 2295148–100Rev. 0

Table of Contents

Chapter 1

SYSTEM 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Procedure of CT Examination 1-1. . . . . . . . . . . . . . . . . . . . . . . Main Components 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gantry 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gantry Control Panel 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gantry Display Panel 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operator Console (OC) 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

User Interface 1-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mouse 1-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Keyboard 1-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accessories 1-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard Accessories 1-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Head Accessories 1-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Body Accessories 1-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Power On/Off 1-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2

SCAN TOP LEVEL SCREEN 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . Icon Selection 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Function of Each Icon 1 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Function of Each Icon 2 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . New Patient 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Patient Schedule 1 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Protocol Management 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Auto Voice Record 1 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Protocol Management 1 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Retro Recon 1 2-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recon Management 1 2-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tube Warmup 2-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Scanner Utilities 1 2-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Raw Data Function 2-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User Calibration 2-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iiCT HiSpeed LX/i Operator Manual

Dir. 2295148–100Rev. 0

Chapter 3

DISPLAY TOP LEVEL SCREEN 3-1. . . . . . . . . . . . . . . . . . . . . . . Primary/Secondary Viewport 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Image Display Layout 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Autoview Layouts 1 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Review Layouts 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . List/Select 1 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Routine Display 1 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Roam Zoom 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Explicit Magnify 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flip/Rotate 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ProView 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GSE (Gray Scale Enhancement) 3-14. . . . . . . . . . . . . . . . . . . . . . . . . Display Normal 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . List/Select 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ellipse ROI 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Measure Distance 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grid 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cross Reference 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User Annotation 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exam Pg / Series Pg 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hide/Show Graphics 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Erase 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Screen Save 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Measurements 1 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MIROI (Multiple Image ROI) 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Report Pixels 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Preference 1 3-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Annotation Levels 3-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Next/Prior Each Viewport 3-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Next/Prior Series Binding 3-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous Report Cursor 3-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Film Composer 3-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto Film Composer 3-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator Bar 1 3-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iiiCT HiSpeed LX/i Operator ManualDir. 2295148–100Rev. 0

Chapter 4

SCAN 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Patient Positioning 1 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . New Patient 1 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Scout Scan 1 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Auto Store 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto Transfer 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Axial/Helical Scan Prescription 1 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . Axial/Helical Prescription (View/Edit) Screen 4-13. . . . . . . . . . . . . . . Continuous Scan Modes 4-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prescribe Scan Parameters 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prospective Multiple Reconstruction 4-21. . . . . . . . . . . . . . . . . . . . . . Icons of the Axial/Helical Scan Prescription screen (1) 4-23. . . . . . Icons of the Axial/Helical Scan Prescription screen (2) 4-28. . . . . . Show Localizer 4-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto mA 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SmartRecon (Option) 4-38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Axial/Helical Scan in Progress 4-40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Axial/Helical Scan End 4-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Priority Recon 4-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Next Series 4-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repeat Series 4-44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . One More 4-46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repeat Last Group 4-47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Biopsy Scan 1 4-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SmartPrep (Option) 1 4-50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Smart Addition (Option) 1 4-56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cardiac Gating (Option) 1 4-61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 5

FILMING 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AutoFilm 1 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AutoFilm Composer 5-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Film 5-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Film Composer 1 5-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ivCT HiSpeed LX/i Operator Manual

Dir. 2295148–100Rev. 0

Chapter 6

QUALITY ASSURANCE 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phantom Description 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Scan the QA Phantom 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High Contrast Spatial Resolution 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . Slice Thickness 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Low Contrast Detectability 6-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Noise and Uniformity 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Weighted CTDI 6-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dose and Performance 1 6-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dose and Performance 2 6-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dose and Sensitivity Profile at Phantom Center 6-21. . . . . . . . . . . . . . .

Chapter 7

TECHNICAL SPECIFICATIONS 7-1. . . . . . . . . . . . . . . . . . . . . . . Component Identification for HiSpeed 7-1. . . . . . . . . . . . . . . . . . . . . . . . Component Labels 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MX165ZJ X–Ray Tube Assembly Information 7-3. . . . . . . . . . . . . . . . . MX165ZJ Diagnostic Source Assembly 7-3. . . . . . . . . . . . . . . . . . . . . . MX165ZJ CT Scan Ratings 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MX165ZJ X–Ray Tube IEC Information 7-6. . . . . . . . . . . . . . . . . . . . . . MX165ZJ Cathode Emission and Filament Characteristics 7-7. . . . . . Tube MX165 ZJ Anode Heating and Cooling Curves 7-9. . . . . . . . . . MX165ZJ X–Ray Tube Assembly Information 7-10. . . . . . . . . . . . . . . . . Generator Specifications 7-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The Attenuation Equivalent 7-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Periodic Maintenance by Qualified Personnel 7-16. . . . . . . . . . . . . . . . . Maintenance by CT Users 7-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Symbols and Classification 7-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning 7-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index

Chapter 1

1-1CT HiSpeed LX/i Operator ManualDir. 2295148–100Rev. 0

SYSTEM

Overview of CT System and Examination

Overview

The HiSpeed computed tomography (CT) system consists of four majorcomponents and some peripheral gear. Four major components are thegantry, table, operator console(OC) and power distribution unit.

The primary objective of this CT system is to obtain for medical diagnosesthe two or three–dimensional images of internal structure of human body.

General Procedures of CT Examination :

1. �The operator prescribes the examination(scan) procedures at the OCwhile the patient is positioned on the table in the scan room.

2. �As the operator initiates the scan procedures with the patient in thegantry aperture, the X–ray unit inside the gantry rotates around thepatient body emitting the fan–shaped X–ray beam to the body. TheX–ray penetrates the body and is received by the detector, then it isconverted to the electrical data.

3. �The data acquired in the above step is processed into the images bythe computer at the OC. Then, the images are initially displayed on theCRT of the OC and subject to manipulation for analysis. The images canalso be filmed later for diagnoses by a physician.

4. �The image data can be saved in some electronic media like optical diskfor later analysis and also be transferred to some other stations forremote diagnoses.

System

1-2CT HiSpeed LX/i Operator Manual

Dir. 2295148-100Rev. 0

Main Components

Gantry

EmergencyButton

Control Panel

EmergencyButton

Control Panel

PositioningLight

PositioningLight

Display Panel

PositioningLight &Breath Navi

Front

Function

The gantry incorporates the X–ray tube unit, the HiLight detector and DAS(Data Acquisition System) inside. It also provides the following functions.

� Display Panel

The display panel shows the readings of the gantry tilt, table height, positionof land mark, latch status, scannable range and tilt range.Refer to the Gantry Display Panel page for the function descriptions.

� Emergency Button

Pressing the emergency button stops every mechanical movement and theX–ray emission.

� Control Panel

The control panel incorporates the several buttons to mainly control themovements of the gantry and table. Each front and rear cover has twocontrol panels. Refer to the Gantry Control Panel page for the functiondescriptions.

� Positioning Light & Breath Navi

The laser beam will be emitted through here that will be used to position apatient. Breath Navi gives the visual breathing instructions to a patient withhearing problem.

System


Gantry Specifications

� Aperture : 70 cm

� Tilt : +/– 30 degrees

� Tilt speed : 1 degree/second

� Focus to isocenter : 541 mm

� Focus to detector : 949 mm

� Rotation speed : 360 degrees in 0.8, 1.0, 1.5, 2.0, 3.0 seconds

X–ray Tube Specifications

� Anode heat storage capacity : 3.5 MHU

� Anode heat dissipation : 820 KHU/min. (maximum)

� Casing heat dissipation : 300 KHU/min. (constant)

� Dual focal spots : 0.9 mm�0.62 mm, 1.2 mm�1.2 mm (Focal size depends on slice thickness and mA.)

HiLight Detector Specifications

� Channels : 816

� View : 972

System


Dir. 2295148-100Rev. 0

Gantry Control Panel

Gantry Tilt

Cradle Out

Table Up

PositioningLight

Table Down

ExternalLandmark

Fast

IMS TableMove

Cradle In

Internal Landmark

Practice

Tilt Range &ScannableRangeDisplay

Gantry TiltLamp

Gantry TiltLamp

ExternalLandmarkLamp

LED

Function

The gantry control panel enables you to move or control the movement ofthe gantry, table or cradle with the following buttons.

� Cradle In/Out

Use this to move the cradle toward or away from the gantry aperture.

� Table Up/Down

Use this to move the table up or down.

� Fast

Use this to increase the speed of cradle in/out. This does not apply to tableup/down.

System


� Gantry Tilt

Use this to tilt the gantry toward or away from the cradle.

WARNING!

The touch sensor on the gantry cover works only during the remote tiltoperation at the OC. It does not work when the tilt operation is done at theControl Panel.

� Gantry Tilt Lamp

The system turns on this lamp when gantry tilt is needed.

� IMS Table Move

Use this to manually extend the cradle (IMS table). The IMS table can beoperated only at the gantry control panel. The LED above the IMS Movebutton indicates the status of the IMS table use (not at the home position).The scannable range sticker on the cradle shows the edge of scannablerange with IMS table fully stretched.

� Positioning Light

Use this to turn on or off the internal/external positioning lights.

WARNING!

The laser beam used for patient positioning can cause eye injuries. Be sure to instruct a patient never to stare into the beam.

� External Landmark

Use this to move the anatomy beneath the external positioning light. When the gantry tilt is set at zero degrees, this button must be depressed formore than 0.5 seconds. Make sure that the [Distance from Landmark]display on Gantry Display Panel shows the number around 190 mm. When the gantry is tilted, keep depressing the button until the ExternalLandmark Lamp gets dim in order for the system to adjust the table height.

� External Landmark Lamp

While this lamp is on, keep depressing the External Landmark button untilthis lamp gets dim to adjust the table height.

System


Dir. 2295148-100Rev. 0

� Internal Landmark

Use this to move the anatomy beneath the internal light to adjust scanlocation zero.

� Tilt Range & Scannable Range

Use this to display the gantry tilt range and the scannable range at certaintable height.

� Practice

Use this to test the * Breath Navi function.

(*Breath Navi is the small device attached to the edge of the gantry aperturethat gives the visual breathing instructions to a patient with hearing problem.)

System


Gantry Display Panel

PositioningLight On/Off Interference

Tilt/AngleRange

Distance from Landmark(mm)

�

X–ray On

ReleaseCradle LockDistance from Iso–Center

� � � �

Function

The gantry display panel shows the following readings and indications.

� X–ray On

The X–ray On lamp illuminates during X–ray exposure.

� Tilt / Angle Range

The Tilt/Angle Range field shows the reading of either the current tilt or thetilt range limits at the current table height/cradle extension. The numericalreading is preceded by either S (superior) or I (inferior).

� Distance from Landmark

The Distance from Landmark field shows the reading of the distance (mm)between the landmark and the anatomy in the X–ray path. The numericalreading is preceded by either S (superior) or I (inferior).

� Distance from Iso–Center

The Distance from Iso–Center field shows the reading of the distance (mm)between the iso–center and the top of the table.

System


Dir. 2295148-100Rev. 0

� Release Cradle Lock

The Release Cradle Lock lamp turns on while the cradle is unlatched.

� Interference

The Interference lamp turns on when some mechanical interference occurs.

� Positioning Light On/Off

The Positioning Light turns on or off when the positioning light button on thecontrol panel is toggled.

System


Table

Cradle

Latch Button

Speaker

Foot Switch(Table Up)

Home Position

Function

The table is used to load a patient for scanning.

� Cradle

The cradle moves into or out of the gantry aperture.

� Latch Button

The latch button is used to latch or unlatch the cradle. The unlatched cradlecan be manually slid. The Display Panel shows whether the cradle islatched.

� Foot Switch

The foot switch is used to automatically raise the table to the height of140cm., then move the cradle inward.

� Home Position

The home position pedal is used to automatically position the table to itslowest level and the gantry to zero tilt.

� Speaker

The speaker is used to deliver oral instructions to a patient.

System


Dir. 2295148-100Rev. 0

Table Specifications

� Vertical range : from 40 cm to 95 cm (cradle height from floor)

� Vertical elevation speed : 18.3 mm/second on average

� Maximum cradle travel : 1620 mm (Note: Table Height, Gantry Tilt, and scanning software determine thescannable range. )

� Cradle speed : 20 mm/second (Slow mode), 100 mm/second (Fast mode)

� Table load capacity : maximum 205 Kg (450 lbs.)

System


Operator Console (OC)

Keyboard

Scan/Display Monitor

Mouse

MOD Drive

Main Switch

CD–ROM Drive

Function

The operator console (OC) is mainly used for the operator to set up the scanprocedures and process the resultant image data.

� Scan/Display Monitor

The 21–inch monitor on the OC can be mainly used for two purposes,scanning patients and displaying images.

� Keyboard/Mouse

Please refer to the User Interface page.

� MOD Drive

Image data can be stored in 2.3 GB MOD (magnetic optical disk).

Caution : It is highly recommended to always take back–up image databecause there may be a possibility of medium breakdown.

System


Dir. 2295148-100Rev. 0

User Interface

The HiSpeed system employs the user interface that enables the operator toeasily interact with the OC workstation. The user interface consists of amouse and keyboard.

Mouse

Left button

Middle button

Right button

General operations of the mouse are as follows:

� “Click”

Press a button once then release it quickly.

� “Double / triple click”

Click two/three times quickly.

� “Click and drag”

Press and hold the button and move the mouse across the pad.

Main functions of each button are as follows:

� Left button

To select any of icon, item, function, etc.

� Middle button

To change window width and/or level by moving the mouse left/right and/orup/down respectively with the button pressed.

� Right button

To scroll the image or modify the image zoom factor.

System


Keyboard

The workstation includes a keyboard for entering text at on–screen promptsand numeric data in data entry fields.

The upper part of the keyboard includes scan–related buttons andsafety–related buttons.

Move toScan

StopMove

PrescribedTilt

StartScan Pause

X–ray on

StopScan

EmergencyStop

Talk (Intercom)Mic.

Volume

Reset

Functions of each button and key are described on the following pages.

System


Dir. 2295148-100Rev. 0

Scan–related buttons

� Prescribed Tilt

Prescribed Tilt enables you to tilt the gantry to the prescribed angle withoutoperating at the gantry panel.

This button starts to flash following the [Move to Scan] button when thegantry tilt is prescribed at the View/Edit Screen and the [Confirm] icon isselected.

When this button is flashing, you can hold it down to remotely tilt the gantrytill it automatically stops at the prescribed angle (maximum � 30 degrees).

Note : The gantry tilts only while the button is being held down.

WARNING!

During this remote tilt operation there may be a danger of the gantry coverhitting the patient unless the operator is very closely watching the tiltmovement. The touch sensor on the gantry cover is supposed to stop thetilt movement when it detects the physical contact with the patient body.However, that sensor is just an auxiliary safety device. Prior to the actualtilt the operator must ensure without relying on the sensor that the gantrycover will not come in contact with the patient body.Breath Navi (look guide) does not have a function of touch sensor.The touch sensor on the gantry cover works only during the remote tiltoperation at the OC. It does not work when the tilt operation is done at theControl Panel.The front touch sensor (option) must be used in case it is hard to see thefront gantry cover from the console.See the next page for the locations the front and rear touch sensors arebuilt in.

System


The locations and sizes of Front/Rear Touch Sensor

Front

75 deg.

SC* : Scan Center

370mm545mm

Front Touch Sensor(optional purchase)

SC*

Rear

SC* : Scan Center

664mm

Rear Touch Sensor

579mm

SC*

Note : After the Touch Sensor worked and stopped the gantry, tilt the gantryto the opposite direction to release it.

System


Dir. 2295148-100Rev. 0

� Move to Scan

Press this button when lit to move the cradle to the prescribed scan startlocation.

� Stop Move

Press this button to stop the cradle when it is traveling.

� Start Scan

Press this button when lit to start scans.

� Pause

Press this button to temporarily halt scans. Scans pause after completing thecurrent one scan. Press Start Scan button to resume scans. ( Note : It is best to use the Stop Scan button to stop the scan immediately. The use of the Pause button may not stop the scan immediately due to thesignal transmission timelag. )

� X–ray on

This button lights up during X–ray emission.

� Stop Scan

Press this button to stop the current or halted scan.

� Emergency Stop

This button cuts off the power to the equipment inside the scan room.All mechanical movements and X–ray radiation are halted.

Note : This button DOES NOT affect the power of OC and laser camera.

� Reset

This button restores the power to the equipment inside the scan room afterEmergency Stop is applied. ( Use a pen head or something like that to pressthis button. A finger must be too big.)

The whole system can be reset by turning on the main switch.

System


Communication button/dials

� Talk (Intercom)

Hold down this button to give some verbal instructions through themicrophone to the patient during a study.

� Volume

Use these dials to adjust the voice volume of patient or operator.

System


Dir. 2295148-100Rev. 0

Keyboard keys

� Function key

F1, F2, F3 and F4 function keys are used for filming–related operations.Please refer to Chapter 5 [FILMING] for detailed information.

FilmSeries

FilmPage

FilmMID

FilmImage

��

F5 function key is used to return to the window width and level that havebeen used most recently.

Previous

W/L

��

F6–F11 function keys are used to preset the specific window width and levelfor specific anatomical areas. The procedure is as follows.

Abdo– Head Lungmen

Media– Spine Drop onstinum

Verte–bra Auto Film

��

1. �Select the image as a primary one (green border) whose WW and WLyou wish to register as default.

2. �Press [Shift+F6–F11] to register those WW and WL as presetconditions.

System


� Image Analysis related keys

These keys are used for image analysis purposes. Please refer to Chapter 3[DISPLAY TOP LEVEL SCREEN] for each key’s function.

DispEraseNorm

EllipseROI

Trace GridOn/Off

MeasDist

UserAnnot

ZoomRoam

� Key top

These keys are mainly used to input texts/numbers and display images.

Enter

��

Next ExamNext

Prior ExamPrior

– [Enter] :�Use this to conclude the entry.

– [��] : Use these to move forward or backward through items on desktop.

– [��] : Use these to adjust window level and width of images.

– [Prior Exam/Prior] : Use this to return to prior exam or image.

– [Next Exam/Next] : Use this to go to next exam or image.

System


Dir. 2295148-100Rev. 0

Accessories

The system utilizes the various accessories to facilitate the scan.

Standard Accessories

� Cradle pad

� Cradle extender

� Arm board

� Standard head holder assembly

� Security straps

� Phantoms to calibrate and check performance

� Phantom holder

� Console chair

� Operator manual

Optional Accessories

� Coronal head holder assembly

� Shallow head holder assembly

WARNING!

Do not use any accessories other than those provided by GE. Use of otheraccessories may cause unexpected troubles or physical injuries.

Also, if anything other than GE accessories is placed in the path of x–raybeams, it may affect image quality.

System


Head Accessories

Head Strap

Chin Strap

Coronal Head Holder Assembly (option)Coronal Head Cushion

Standard Head Holder Assembly

Coronal Head Neck Pad

(Front side) (Back side)

MADE FOR GENERAL ELECTRIC CO.MILWAUKEE, WISCONSIN BYGE YOKOGAWA MEDICAL SYSTEMS, LTD.7–127 ASAHIGAOKA 4–CHOME, HINOSHI TOKYO, JAPANMODEL 2201806SERIALMANUFACTURED OCTOBER 1997


Label

Label

(Back side)

LabelMADE FOR GENERAL ELECTRIC CO.MILWAUKEE, WISCONSIN BYGE YOKOGAWA MEDICAL SYSTEMS, LTD.7–127 ASAHIGAOKA 4–CHOME, HINOSHI TOKYO, JAPANMODEL 2183827SERIALMANUFACTURED OCTOBER 1997

Shallow Head Holder (option)

Wedge (Large, Small)

System


Dir. 2295148-100Rev. 0

Standard Head Holder Assembly

� Standard Head Holder

Use during normal head studies, with a supine patient. Use the head band,chin strap, and coil spacers (wedges) to secure the head in the properposition. The material is metal–free.

� Head Holder Cushion

Place this cushion on the Standard head holder. Use it to cushion the headand hold it in position during the study. Two sizes are available.

� Head Band

Place the wide area of the head band between the head holder and headholder cushion, with the straps hanging on either side of the head holder,before the patient lays on the table. Move the patient’s head into position onthe cushion, cross each end of the band over the forehead, and fasten thepad of Velcro “loops” to the “hooks” on the back of the head holder. Use thehead band to position and stabilize the head during a study.

� Chin Band

Center the hole in the band over the patient’s chin, and fasten the pad ofVelcro “loops” to the “hooks” on the back of the head holder. Use the chinband to position and stabilize the head during a study.

Coronal Head Holder Assembly (option)

� Coronal Head Holder

Use this head holder during direct coronal studies. The patient lays in thesupine position, with the head tipped backward into the coronal head holder.Use the head band and chin strap to secure the head in the direct coronalposition. The material is metal–free.

� Neck Pad

Place this pad vertically in the Coronal head holder to cushion the rearhead.

WARNING!

Be extremely careful to avoid contact between the coronal head holderand the gantry while lowering the table in the aperture. Patient injury to theneck or equipment damage could result.

System


Body Accessory Use

� Knee Pad Assembly

Place the knee pad on the cradle. Rest the patient’s legs, with knees slightlybent, on the knee pad –or– Rest the patient’s head on the knee pad, anduse the knee pad strap to secure the hands over the patient’s head, toprevent catching the patient’s fingers between the cradle and table surfaces.

� Knee Pad Strap

Attaches to the three Velcro “loop” patches on the knee pad with Velcro“hooks”; use to secure the legs or arms to the knee pad. (See above)

� Cradle Pad

Use during standard studies; attaches to the cradle with Velcro “hooks.”

� Cradle Extender

Attach the cradle extender to the end of the table nearest the gantry, toincrease the overall cradle length, and position the body area of interestinside the scannable range. Use the extender to support the patient’s heador feet during a body scan. The material is metal–free.

System


Dir. 2295148-100Rev. 0

Security Strap Kit

� Body Strap A

Use the 60 mm wide strap to position and secure the patient’s head to theHead Cushion; or use as needed to secure blankets or clothing. FollowBody Strap B directions to attach and secure the straps. One set providedwith system.

� Body Strap B

Use the 150 mm wide straps to secure the body to the cradle, to reducepatient movement; to secure blankets or clothing, to prevent contact with thecradle surface; or, to cover and secure the patient’s hands. Slide the nylonguide, opposite the Velcro ends of the straps, into the raceway attached toboth side edges of the cradle. Slide the strap along the length of the cradleto position it over the patient, and fasten the Velcro ends together to securethe patient. Three sets provided with the system

� Body Strap C

Use the 370 mm wide strap in the same manner as Body Strap B.One set provided with system.

� Extension Strap

Use the extension strap with the corresponding body straps to secure largeor obese patients. Attach Velcro “hooks” to “loops” on the body strap toincrease the length. Each set of body straps has an extension strap; fiveprovided with the system.

System


Body Accessories

Knee Pad

Knee Pad Strap

Cradle Extender

Cradle Pad

(Back side)

Cradle Extender Pad

Extender Strap (15cm.)37cm. Body Strap


Label

System


Dir. 2295148-100Rev. 0

Attach/Detach Head Holder and Cradle Extender

CAUTION

Prevent damage to metal–free accessories !Carefully examine the metal–free clasp assembly on theaccessory and the catch on the cradle before attempting toattach the accessory for the first time.

To attach an accessory:

� Make sure the clasp on the accessory is unlatched, and hanging freely.Hold the clasp in the unlatched position while you attach the accessory.

� Align the accessory tongue with the pocket at the end of the cradle.Keep fingers clear of the cradle. Slide the tongue all the way into thepocket until it rests snugly against the angled face of the cradle.

� Gently pull the clasp toward the floor and away from the gantry until ithooks the catch on the cradle. Push the hinged–end of the clasp towardthe cradle until it snaps into place.

To detach an accessory:

� Pull the hinged–end of the clasp toward the floor and away from thegantry until it snaps open and clears the catch.

� Gently slide the accessory toward the gantry until it clears the cradle.If the accessory offers any resistance, check to make sure the claspcleared the catch on the cradle.

System


System Power On/Off

How to turn on the system power ( ��er to maintain the system stability

it is highly recommended to shut down and reboot the system once a day.)

1. �Turn on the main switch located on the lower right side of the OC.

2. �The system will start up and the Scan/Display monitor on the OC willautomatically proceed to its Top Level screen.

How to turn off the system power ( ��er to maintain the system stability

it is highly recommended to shut down and reboot the system once a day.)

1. �Click on the [Shutdown] icon on the upper left corner of the screen.

Shutdown

2. �The system will automatically proceed to the point where you can turnoff the main switch.

Note: In case you turn off the main power to the system immediately afterremoving a great number of images, when you boot up the systemnext time, there still may be some images unremoved. When youwant to remove some 3,000 images, wait at least 5 minutes beforeturning off the power. It may take around 30 minutes to remove some18,000 images. To maintain the stability of the system, reboot thesystem once a day.

System


Dir. 2295148-100Rev. 0

Blank page

Chapter 2

2-1CT HiSpeed LX/i Operator ManualDir. 2295148-100Rev. 0

SCAN TOP LEVEL SCREEN

After the system starts up, the following screen appears on the CRT asdefault Top Level screen. This screen will also appear when the [Scan] iconon the upper left corner is selected while in the either Display or ImageWorks mode.

Scan

Scan Top Level Screen


Dir. 2295148-100Rev. 0

Icon Selection

� When a certain icon is selected, it highlights in blue.

� Icons currently not available are displayed in gray.

� When the second icon is selected after the first one was selected, the firsticon highlights in green and its upper right corner folds.

Functions of each icon are described on the following pages.



Function of Each Icon 1

Display

��

Scan

��

��

This icon leads to the scan screen.

This contains Reformation, 3D, Network and other advanced

image analysis applications. Refer to {Image Works} section.

This is only for service purpose. Users are not allowed totouch this.

Use this to shut down the system.

This icon leads to the Display screen.

The icons on the Display screen are described in the laterchapter.

��

This icon leads to the InSite service.(This icon is not available unless InSiteoption is installed.)



Dir. 2295148-100Rev. 0

Function of Each Icon 2

To see current messages

Remaining disk space

� Remaining Disk Space

This area shows the remaining disk space. ( The above example shows thatthe disk can hold 148 images of 512x512 matrix, which amounts to 595images of 256x256 matrix.)

� Reconstruction Status

This area shows the exam, series and image number of the exam that iscurrently being reconstructed.

� Archive Status

This area shows the status of images being archived.

� Network Status

This area shows the status of networking.

� Filming Status

This area shows the status of filming.

� Current Messages

Click here to open the Current Messages screen.



New Patient

New Patient icon is located at the left side of the screen.

New Patient

Function�Select this icon first to begin a new patient exam.

Refer to the chapter 4 [Scan] for detailed information.

1. �Click on the [New Patient] icon to open the following New Patientscreen.

Patient Information

Exam Number

Accession Number

Patient ID

Patient Name

SexBirthdate

Age

Weight Kilograms Pounds

Referring Physician

Radiologist

Operator

History

Exam Description

Protocol Number

EndExam

Protocol Selection

2. �Enter necessary patient information.

Note : Patient ID must be put to proceed. (required)

3. �Choose a desired scan protocol from the Default Protocol area locatedon the right side of the New Patient screen.

4. �The system automatically proceeds to the View/Edit screen.



Dir. 2295148-100Rev. 0

Patient Schedule 1

Patient Schedule icon is located below the New Patient icon.

Patient Schedule

Function�Patient Schedule allows you to enter patient data ahead of time.Once it is time to perform a specific patient exam, you can select from thecreated list, enter the patient ID or requisition number to call up the patientdata.

1. � Click on [Patient Schedule] to open the following Schedule list.

Patient ScheduleSchedule

Status Patient ID

C

N

C

C

C

8120

8255

8764

Patient Name

Kim McCquaer

Dave Sonaty

Laura Sepcic

Date Time Exam Description

Next PriorQuit Add DeletePreferencesSelect View

5300 Juliet Herman

2761 Brad Fox

Patient AllPatient More InfoEdit

PatientDelete

Selected

6/15/98

6/12/98

6/09/98

6/02/98

5/27/98

10:23AM

02:19PM

03:26PM

11:23AM

10:46AM

Req. Number

0654

0718

0788

8332

9102

On the left side of the column under Status, there are two letters. C standsfor Completed and N for New. The completed exam at the top of the list isthe last completed exam. The only active functions at this point are [Quit]�[Add Patient], [Delete All], [Preferences] and Next/Prior arrows.

Note : Active icons have clear black characters on them whereas inactiveicons have dim characters.

2. �Once a patient is selected, the other icons become active.

Functions of each icon are described on the following pages.



Patient Schedule 2

Select Patient

SelectPatient

Take the following steps to use [Select Patient].

1. �Select [New Patient].

2. �Select [Patient Schedule].

3. �Select the desired patient on the Schedule list.

4. �Select [Select Patient]. The patient data will then be placed in the NewPatient data area.

Note : The patient data will also be called up by typing in the patient ID.

View More Info

ViewMore Info

While your HiSpeed system is connected with HIS/RIS and if your HiSpeedsystem has Connect Pro option, select [View More Info] to get moreinformation on the patient.



Dir. 2295148-100Rev. 0

Patient Schedule 3

Add Patient

AddPatient

Select [Add Patient] to open the following menu to add patients to theschedule. Patient data, date and time of the exam and the protocol can beentered here.

Patient Schedule

Accession Number

Patient ID

Patient Name

SexBirthdate

Age


Referring Physician

Radiologist

Operator

History

Exam Description

Protocol Number

Cancel

Protocol Selection

Accept

Anatomical Selector

Date Time

– Accession Number : Within 16 characters

– Patient ID : Within 16 characters

– Patient Name : Within 64 characters

– Sex : M (Male) or F (Female)

– Birthdate : Year, Month, Day

– Age : Years, Months, Weeks, Days

– Weight : Kgs or Pounds



Patient Schedule 4

– Reference Physician : Within 32 characters

– Radiologist : Within 32 characters

– Operator : Within 3 characters

– History : Within 60 characters

– Exam Description : Within 22 characters

– Protocol Number : Within 5 characters

– Date : Exam date, Year, Month, Day

– Time : Exam time, Hour, Minute

Edit Patient

EditPatient

Select [Edit Patient] to bring up the Patient Information screen to edit patientdata.



Dir. 2295148-100Rev. 0

Patient Schedule 5

Delete Selected

DeleteSelected

[Delete Selected] allows you to delete specific patients from the Schedulelist.

1. �To delete only one patient, click on that patient’s information, then select[Delete Selected].

2. �To delete multiple patients in order, click on one patient, then go to thelast patient and press and hold the Shift key, then click on that patient.Then, select [Delete Selected].

To delete multiple patients out of order, press and hold the Control key,then click on the desired patients and select [Delete Selected].

3. �A confirmation message “Are you sure you want to delete selectedpatients ?” appears. If OK, click on [OK].

Delete All

DeleteAll

[Delete All] allows you to delete all of the patients.

1. �The following screen appears after selecting [Delete All].

Delete All

AllCompleted

AllNew

All

OK Cancel

2. �Select [All Completed] to delete all scan–completed patients.Select [All New] to delete all new patients.Select [All] to delete both of the above patients.

Note : The default is [All Completed].



Patient Schedule 6

Preferences

Preferences

[Preferences] allows you to set the sort order and delete time.

1. �The following screen appears upon the selection of [Preferences].

Preferences

OK Cancel

Update ScheduleAutomatically ?

Yes No

Yes NoShow UpdateParameters ?

Sort By : Date/Time

Name ID

Delete Completed Exams After : Days

Default Update Parameters

Get Patient List For :ThisSystem

All CTSystems

AllSystems

With a Date Range :Today

Days Before Today

Days After Today

All Dates

2. �The patient list can be sorted by Date/Time, Name or ID.

3. �If you want the system to automatically delete completed exams, youcan click in the Days box and type in the number of days desired.The default is 0 (zero).

4. �Select [OK] to conclude the entry.



Dir. 2295148-100Rev. 0

Protocol Management

Protocol Management icon is located at the right side of the New Patienticon.

Protocol Management

Function : Protocol Management includes two functions, which are [AutoVoice Record] and [Protocol Management].

1. �The following screen appears upon the selection of [ProtocolManagement].

Auto VoiceRecord

ProtocolManagement

Quit

2. �Select [Auto Voice Record] to set up Auto Voice or select [ProtocolManagement]

Select [Quit] to quit.

Functions of [Auto Voice Record] and [Protocol Management] are describedon the following pages.



Auto Voice Record 1

Function : This function allows you to give the patient recorded vocalinstructions.

1. �The following screen appears when you click on [Protocol Management]icon.

Auto VoiceRecord

ProtocolManagement

Quit

2. �The following Auto Voice Record screen appears upon the selection of[Auto Voice Record].

Auto Voice Record

��

��

��

1.2.3.4.5.6.7.8.9.

��

��

11.12.13.14.15.16.17.18.1920.

��

Create New Message Message Management

�� !

�"�# Save Message

�"�# $�"��

$��

��

10.

Language Selection English

Twenty protocols in all are available. The first three protocols are preset inthe system and can not be changed. Other 17 protocols are programmable.



Dir. 2295148-100Rev. 0

Auto Voice Record 2

As for the first three protocols, there are nine language options.In order to choose any one of them, click on the [English] button on the AutoVoice Record menu on the previous page to open the following menu.

Auto Voice Language Selection

English–male English–female Japanese

German Spanish

French

Mexican Spanish

Cancel

Italian

Korean

Click on any one of them for your purpose.

3. �To create a new Auto Voice instruction message, point and click in theName area where you wish to put the protocol. Type in the name andpress the Enter key.

After pressing the Enter key, the Pre and Post Message areas becomeactive.

4. �Go to the Create New Messages area to create new instructionmessages.

Record Stop

Play Save Message

0.0

Create New Messages

The only active icon at this point is [Record].



Auto Voice Record 3

5. �Once you are ready to record, select [Record]. The time clock to theright will start. The maximum recording time is 20 seconds.

6. �When finished with recording, select [Stop]. Select [Play] to listen towhat was recorded.

7. �To save the recorded message as a protocol, click on the Pre or PostMessage box and select [Save Message].

8. �The Message Management area allows you to play or delete an existingAuto Voice protocol. To delete a protocol, select the protocol name andthen select [Delete Set].

Play

Message Management

Delete Set

Done

To play a message, simply select the message box you wish to playand select [Play].

9. �To leave the Auto Voice Record menu, select [Done].



Dir. 2295148-100Rev. 0

Protocol Management 1

Function : This function allows you to create, edit or delete scan protocols.

1. �The following screen appears when you click on [Protocol Management]icon.

Auto VoiceRecord

ProtocolManagement

Quit

2. �The following screen appears upon the selection of [ProtocolManagement] on the above screen. This is the Adult Protocol menu.The Infant Protocol menu is also selected by clicking on the Infant tab.

Quit

Protocol Management

Adult tabInfant tab

3. �Select a protocol or an anatomic region to open the menu on the nextpage.




4. �You can build up to 15 protocols for each anatomical region.

Protocol Name Default

New Edit Delete

Done Cancel

Duplicate

5. �To duplicate (copy) an existing protocol, first choose the protocol andselect [Duplicate]. Then, you may slightly modify it to create a newprotocol that will have the similar parameters to the original protocol.

6. �To edit or delete an existing protocol, first choose the protocol andselect [Edit] or [Delete] respectively.

7. �To create a new protocol, select [New].

8. �After selecting [New], enter the protocol name on the highlighted lineand press the Enter key. To set a protocol as the default for the region,select the [Default] button next to the protocol. Only one protocol canbecome the default for the region.

9. �Next, select the Series Type that will begin the protocol and click on[OK].

Scout

OK Cancel

Axial

Select New Series Type

The following Protocol Setup screen appears.



Dir. 2295148-100Rev. 0


The following screen is an example of axial scan protocol setup.

Anatomical

Prior Next

Series Description

Prior Next Create

Split

Repeat��

Cancel ��Delete

Protocol Parameters Setup Screen

Reference

Protocol :

Auto Transfer Auto FilmSetup

ShowLocalizer

AutoStore

AddGroup Current

Group

DeleteSelectedGroup

Images ScanType

StartLoc.

EndLoc.

No. ofImages

Thick(mm)

ImageInt’val Pitch Gantry

Tilt SFOV kV mA

Scan Timing FilmRecon

Series Series Series Series

Series:

ReconArea

CTDIw(mGy)

Axial

Axial

S50.0 S10.0 5 581–8 0 120 180

9–15 7S10.0 I60.0 10 10 0 120 160

Body

Body

Auto mA OFF

SmartReconOFF

10. �In the above screen, the [Scan] icon parameters (Thick, Image Int’val,pitch, etc.) are supposed to be filled. In order to enter Timing, Reconand Film parameters, click on the [Timing], [Recon] and [Film] icon,respectively. The menus for Timing, Recon and Film are shown on thefollowing pages.

Prior/Next : Prior or Next key appears on the screen only when morethan three groups are prescribed for one screen.




The following Timing menu will appear when you click on the [Timing] icon.

PrepGroup ISD

(sec)

BreathHold(sec)

BreatheTime

AutoVoice

No.

Scan Timing Recon Film

(sec)

The following Recon menu will appear when you click on the [Recon] icon.

DFOV(cm)

R/LCenter(mm)

A/PCenter(mm)

ReconType

ImageFilter

MatrixSize

MotionCorrect

SpecialFilter

ShowRecon1

ShowRecon2

ShowRecon3

Y N N


The following Film menu will appear when you click on the [Film] icon.

AutoFilm

FrameFormat

Interval Flip Width1

Level1

MagFactor Rotate

UserAnno. GSE

Recon 1Film Set

1

Recon 1Film Set

2

Recon 2Film Set

1

Recon 2Film Set

2

Recon 3Film Set

1

Recon 3Film Set

2




Dir. 2295148-100Rev. 0


Select [Prior Series] to display the prior series protocols.

Select [Next Series] to display the next series protocols.

Select [Repeat Series] to add the same series protocols.

Select [Delete Series] to delete the displayed series protocols.

Refer to the Chapter 4 for the function of other icons or buttons.

11. �After all the scout view parameters have been entered, select [CreateNew Series] button on the front page screen to create the next series.Then, the following screen appears.

Scout

CreateBefore Cancel

Axial


CreateAfter

12. �Select the series type from [Scout] or [Axial].

Also, select [Create Before] or [Create After] to determine if the serieswill be put before or after the first series you built.

13. �Again, enter scan parameters for the series selected.

14. �After all the series and the parameters have been created, touch[Accept] button to save the protocol.

15. �You will then return to the beginning so that you may choose toduplicate, delete, edit or create a new protocol. Or you can select[Done] and then [Quit] to exit the protocol section.



Retro Recon 1

Retro Recon icon is located below the Patient Schedule icon.

Retro Recon

Function : Retrospective reconstruction allows you to change thereconstruction parameters that were previously used for the exam. ThroughRetro Recon you are allowed to change DFOV(Display Field of View),AP(Anterior/Posterior) and RL(Right/Left) Centering, Recon Type, MatrixSize, Segmenting and Peristaltic Motion Correction for axial series.

1. �First click on the [Retro Recon] icon. The following screen appearslisting up to 1000 scan data. Click on the [Update] button to update thelist or select [Quit] to exit.

Retro Recon List Select Screen

Quit

Retro Recon List Select

Exams

Select Update

Patient ID Patient Name Exam # Date Time SuiteSeries

Series # Series Description Landmark

Prior Next Prior Next

Series

2. �Point and click on the exam and series you wish to reconstructretrospectively and then choose [Select Series] at the bottom center.

The system automatically proceeds to the Retro Recon View/Edit screen.



Dir. 2295148-100Rev. 0

Retro Recon 2

3. �After selecting [Select Series], the following screen appears displayingall of the groups in the selected series. Y(Yes) in the Retro columnmeans that group will be reconstructed. If you do not wish to recon thegroup, simply point and click on the “Y” icon for the group to toggle it toN(No).

When the [Images] icon is selected, the right side of the screen is as follows.

RetroScanType

Y

Y

ScanStart

Location

ScanEnd

LocationRetroStart

RetroEnd

No. ofImages

ImageInterval

GantryTilt

SFOV

Y

QuitList

Exams Confirm

Images ReconPrior Next

When the [Recon] icon is selected, the right side of the screen is as follows.

RetroScanType

Y

Y

ScanStart

Location

ScanEndLocation

R/LDFOV

Y

QuitList

Exams Confirm

Prior Next

Center(mm)

A/PCenter

ReconType(mm)

ImageFilter

MotionCorrect

ReconMode

MatrixSize

SpecialFilter

Images Recon

(cm.)

GraphicRetro

N

N

N



Retro Recon 3

4. �Enter the parameter changes and select [Confirm].

– Retro Start : Start location of retro recon

– Retro End : End location of retro recon

– Image Int’val : Image interval (in case of Helical)

– DFOV : Display Field of View ( 4.8cm to SFOV)

– DFOV A/P R/L Center : Anterior/Posterior and Right/Left center of DFOV

– Recon Type : SOFT, STND, STD+, DETL, CHEST, BONE, EDGE or PFRM

– Image Filter : Smooth (S1, S11, S2, S21, S3), Edge (E1, E2, E21, E22, E23, E3), Lung (L1, L2, L3)

– Motion Correct : Motion correction

– Recon Mode : (See next page.)

– Matrix Size : 256x256 or 512x512

– Special Filter : ANR (Advanced Noise Reduction) (1 or 2), AAR (Advanced Artifact Reduction) (1 or 2)

ANR filter allows you to reduce noise without compromising spatialresolution. It contributes to a decrease in standard deviation byapproximately 10%, which may be equivalent to one–step decrease inmA. Note : ANR is compatible only with SOFT, STND, and STD+.

AAR filter allows you to reduce artifacts normally shown around arms.

When you click on the [Special Filter] button or the each Special Filterfield, the following menu appears.

None ANR 1 ANR 2 CancelAAR 1 AAR 2

Select the desired Special Image Filter.

[ANR 2] has a stronger effect than [ANR 1]. Also, [AAR 2] has astronger effect than [AAR 1]. Select either of them or select [None] notto use these filters.



Dir. 2295148-100Rev. 0

Retro Recon 4

– Graphic Retro : If you wish to display on the image the circle cursor tographically prescribe the retro recon area instead of typing in DFOV,R/L Center and A/P Center, toggle N (No) on each field to Y (Yes).

If the displayed circle cursor is too big to handle, type in the smallerenough DFOV to display the entire circle cursor, then change its sizeand location using one of four squares outside the cursor and thecenter dot of the cursor respectively to designate the recon area.

5. �Select the [Recon Mode] button to open the following screen.(*Smart Helical Option is needed to have [Plus] button.)Recon Mode section allows you to edit the scan type and the amount ofdata for reconstruction.

Cancel

Axials:

Recon Mode

Full

OK

Helicals:

Cines:

Segment Full Plus

Segment Full

2 3 4 5 6

The scan types available to edit will be active.

[Full] uses full–rotation data, whereas [Segment] uses partial–rotation data.

*Smart Helical Option offers [Plus] function that uses 1.6–rotation data.

Make the appropriate selection.

6. �Click on the [Confirm] button to start retro recon.

Newly retro–reconstructed images will be saved as a new series with“Retro” annotation.

7. �If you need to retro–recon another exam/series, select [List Exams]button. Select [Quit] to exit.



Recon Management 1

Recon Management icon is located at the right side of the Retro Recon icon.

Recon Mgmt

Function : Within the Recon Management function, you can have access toSuspended Entries and Recon Queue Management.

1. �Select [Recon Mgmt] to open the following screen.

Recon Management

Suspended EntriesPatient ID Exam # Series # Image # Type

DeleteSuspended

Entries

UnsuspendedEntries Prior Next

UpdateList

Recon Queue Management:

PauseQueue

ViewQueueEntries

RestartQueue

DeleteRetroEntries

Quit

Functions of each button are described on the following pages.



Dir. 2295148-100Rev. 0

Recon Management 2

Suspended Entries

These are basically images that were not reconstructed for some reason andwere placed in a Queue.

� [Delete Suspended Entries]

Select this button to delete the suspended entries. Once the images aredeleted, they can not be reconstructed prospectively, but they can bereconstructed retrospectively.

� [Unsuspended Entries]

Select this button to try to reconstruct the images again after selecting imageentries.

� [Update List]

Select this button to update the Unsuspended Entries List if any entries needto be added while Recon Management was open.

Recon Queue Management

� [Pause Queue]

Select this button to stop the reconstruction process. This might be useful ifyou have just started a Retro Recon, but maybe incorrect parameters wereentered. Instead of having the system reconstruct all of the incorrect images,you can select [Pause Queue] to stop the reconstruction and then delete theimages that have not been yet reconstructed.

� [Restart Queue]

Select this button to restart the reconstruction queue after you stopped it forsome reason.

� [View Queue Entry]

Select this button to display a menu that shows what is in the reconstructionqueue. You can select [Cancel] to leave the View Queue function or select[Update List] to update the queue entries list.

� [Delete Retro Entries]

Select this button to delete entries that remain in the reconstruction queue.This is used in conjunction with [Pause Queue].



Tube Warm–up

Tube Warmup icon is located below the Retro Recon icon.

Tube Warmup

Function : Tube Warmup allows you to have access to the Tube Warmupand Daily Calibration procedures.

Note : Tube Warmup is required when more than two hours have passedsince the last scan or whenever the system recommends it.

1. �Click on the [ Tube Warmup] icon. The following screen will appear. [ Tube Warmup] button on the screen allows you to conduct only thetube warm–up procedure. [Daily Calibration] allows you to perform boththe tube warm–up and daily calibration procedures. [Daily Calibration] isselected by default.

��

Cancel OK

Make sure that no one is in the scan room and the gantry aperture isclear during warmup.

Tube Warmup

Daily Calibration

Tube Warmup

Warming up the tube as recommended will provide the high qualityimages and extend the life of the tube.Menu1

2. �Select the [ Tube Warmup] button, then [OK] to proceed to the tubewarmup procedure or select the [Cancel] button to exit.



Dir. 2295148-100Rev. 0

Tube Warmup 2

3. �Upon selection of [OK], the following scan menu will appear. Select [Confirm] to initiate the tube warm–up.

Service Scan

Service Tool: Warm up Scan Exam ID: 218120

Scan Type Axial

Scan Time 2.0 secondsVoltage 80 kVCurrent 80 mA

Thickness 1.0 mmFocus Large

Remaining scan : 18

Press <Confirm> and Start scan> to start scan

ConfirmCancel

Menu 2

4. �Several seconds after selecting [Confirm], the [Start Scan] button on thekeyboard flashes. Press it to start X–ray radiation.

The system automatically performs four tube warm–up scans.

Note : When you select the [ Tube Warmup] button more than 30 hourslater since the last daily calibration, the following message will be postedto urge you to perform daily calibration.

Service ScanWarning

Please execute “Daily Calibration” to provide thehigh quality images.

Do you continue the tube warmup ?

Yes No

Selecting [Yes] leads you to Menu 2 and [No] to Menu 1.



Tube Warmup 3

5. �When you select the [Daily Calibration] at Menu 1, Menu 2 will appear.

Service Scan

Service Tool: Warm up Scan Exam ID: 218120

Scan Type Axial

Scan Time 2.0 secondsVoltage 80 kVCurrent 80 mA

Thickness 1.0 mmFocus Large

Remaining scan : 18

Press <Confirm> and Start scan> to start scan

ConfirmCancel

Menu 2

Upon selection of [Confirm], the system first performs the same scanprotocol as Tube Warmup and daily calibration later.



Dir. 2295148-100Rev. 0

Scanner Utilities 1Raw Data Function

Scanner Utilities icon is located at the right side of the Tube Warmup icon.

Scanner Utilities

Function : From Scanner Utilities you can have access to either RawdataFunction or User Calibration.

1. �Click on the [Scanner Utilities] icon. The following screen will appear.

Scanner Utilities

RawdataFunctions

Quit

UserCalibration

2. �Select [Rawdata Functions] to open the following default screen.This screen will also appear when you select [Save to MOD] from thepulldown menu of Function Selection. (See next page.)

File Function Selection Rawdata Selection

Save Rawdata to MOD

Select RawDataExam:

Exam # NameExam No:Series #

Series No:Acqs # Type Rotation Azimuth Location Scan Time kV mA Thick Focus SFOV Reserve Date/Time

Start Save

Type Acqus Reserve Patient PositionDate Reserve




When you select the [File] button, the [Exit] button appears.Select [Exit] to exit from Rawdata Functions.

When you select the [Function Selection] button, the pulldownmenu appears which contains the [Save to MOD],[Restore/Delete from MOD], [Reserve/Release] and [InitializeMOD] buttons.

When you select the [Rawdata Selection] button, the pulldownmenu appears which contains the [Whole Exam], [WholeSeries] and [Individual Raw] buttons.

%�"�

��

%��"��

�� &$

��'$�"��(��&$

�� '��"��

��"�)��&$

��"��

��"��

��"��

�� "��



Dir. 2295148-100Rev. 0


Save Rawdata to MOD

When you select [Save to MOD] from the [Function Selection] pulldownmenu, the following screen will appear.


Save Rawdata to MOD

Select RawDataExam:

Exam # NameExam No:Series #


Start Save

Type Acqus Reserve Patient PositionDate Reserve

1. �Select any of raw data that you wish to save to MOD (Magnetic OpticalDisk). You can also use [Whole Exam], [Whole Series] or [IndividualRaw] button from the [Rawdata Selection] pulldown menu.

2. �After selecting the raw data, click on the [Start Save] button to startsaving the raw data into the MOD.




Restore/Delete from MOD

When you select [Restore/Delete from MOD] from the [Function Selection]pulldown menu, the following screen appears.


Restore/Delete from MOD

Select RawDataExam: Exam No:


Restore Delete

Exam # Name Series # Type Acqus Reserve Patient PositionDate Reserve

1. �Select any of raw data that you wish to restore from MOD to the systemdisk, or that you wish to delete from MOD. You can also use [WholeExam], [Whole Series] or [Individual Raw] button from the [RawdataSelection] pulldown menu.

2. �After selecting the raw data, click on the [ Restore] or [Delete].



Dir. 2295148-100Rev. 0


Reserve/Release Rawdata

When you select [Reserve/Release] from the [Function Selection] pulldownmenu, the following screen will appear.


Reserve/Release Rawdata

Select RawDataExam: Exam No:


Reserve Release

Exam # Name Series # Type Acqus Reserve Patient PositionDate Reserve

1. �Select any of raw data that you wish to reserve or release.( “Reserve” rawdata means to protect rawdata from being deleted.“Release” rawdata means to release the protection.)

2. �After selecting the rawdata, select [Reserve] or [Release].




Initialize MOD

When you select [Initialize MOD] from the [Function Selection] pulldownmenu, the following screen will appear.

Initialize MOD

Initialize MOD will take approximately 3–4 minutes.

Press Yes to continue or No to quit.

Yes No

1. �Select [Yes] to start initializing the MOD.

2. �Select [No] to exit.



Dir. 2295148-100Rev. 0

Scanner Utilities 7User Calibration

1. �Select [User Calibration] to open the following screen.

Calibration

Sequence

AirCalibration

Air & PhantomCalibration

kV

80 120 140

Cancel OK

2. �Select either [Air Calibration] or [Air & Phantom Calibration].Also, select kV from 80, 120 or 140.

3. �Select [OK] to perform calibration scans, or [Cancel] to cancel.

Chapter 3


DISPLAY TOP LEVEL SCREEN

The following screen will appear when you click on the [Display] icon on theupper left corner of the screen while in the either Scan or Image Worksmode.

Image Area

Display

Display Top Level Screen


Dir. 2295148-100Rev. 0

Primary/Secondary Viewport

Focus Selection

“Focus” means which viewport is active for image display. There are twokinds of focus, which are primary and secondary focuses. Primary focusviewport has a blue border, whereas the secondary focus viewport has ayellow border.

Every image analysis or manipulation function is available in primary focus.Image analysis or manipulation functions available in the secondary focusare as follows: Window W/L, Magnification, Pan/Zoom, Flip/Rotate, DisplayNormal, and Erase Graphics.

You can select the primary or secondary focus by clicking on the desiredviewport as follows:

� Double click

To select primary focus viewport and deselect other viewports

� Single click

To select a new primary focus viewport and change the previous primary tosecondary

� Triple click

To select a new primary focus viewport and change all the other viewports tosecondary



Image Display Layout

Layouts

On the Display desktop, there is a choice between two layouts for viewingimages. They are the Autoview Layouts and the Review Layouts. Duringscanning the Autoview Layouts will primarily be used.

Autoview Layouts

Click on the left side of this button to select Au-toview Layouts and on the right side for ReviewLayouts.

��

Clicking here with Autoview Layouts leads tothe screen format choice from three formats.

Clicking here with Review Layouts leads to thescreen format choice of five format for Full Screen orViewport.

Each layout is described on the following pages.



Dir. 2295148-100Rev. 0

Autoview Layouts 1

1. �Select Autoview Layouts at the Exam Rx Display menu to open theAutoview Layouts menu.

Autoview Layouts

Autoview Layouts menu

Scout Auto AutoFilmView

AutoLink

AutoView

AutoLink

AutoLink

AutoView

Back



Autoview Layouts 2

There are four different types of viewport for six other Autoview Layouts.

� Autoview

This viewport always displays in real time the most recently reconstructedimage. Next/Prior buttons do not work here.

� Auto Reference

This viewport displays a Scout image with reference lines that show thelocations of Autoview images. Front Scout and side Scout can be toggled byNext/Prior buttons.

� Auto Film

This viewport displays an image for auto filming and occupies the upper leftquadrant. This can be done by selecting the folded corner at the top right ofthe viewport. To return the viewport to the cross reference display, select thefolded corner again.

� AL (Auto Link)

While reconstruction is active, the lower right viewport will automaticallydisplay the first image of the series being currently reconstructed. Theviewport will be annotated with AL to indicate that Auto Link is on. All displayfeatures and Next/Prior can be used with Auto Link.

� Free

This viewport can be used to display any image from other exam or series.



Dir. 2295148-100Rev. 0

Review Layouts

Multiple Image Display (MID)

Review Layouts can be used during scanning, but you will be unable to viewthe current autoviewed image or autofilming.

1. �Display an image in primary focus viewport.

2. �Select Review Layouts at the Exam Rx Display menu to open theReview Layouts menu.

Review Layouts

[ViewportFormat]

Review Layouts menu

[Full ScreenFormat]

3. �Select [Full Screen Format] to display the selected layout on the entirescreen. Select [Viewport Format] to display the selected layout inprimary focus viewport.

4. �Select one of the four formats.



List / Select 1

Selecting this function will give you a listing of the exams and otherinformation about the exams on the system disk.

1. �Select List / Select at the Exam Rx Display menu.

List / Select

2. �The following List/Select browser appears.

Note : The List/Select browser does not appear when the system diskcontains no data.

�

A: Examination ListB: Series ListC: Image List

Examinations : Exam #47, May 05 92, SMITH, JON

Exam

J.Herman

DateName Ser Imgs Description Mod

2 examinationsSeriesone series

60 images

Number of images stored: 1101, Available disk space: 948 256x256 image(s), or 236 512x512 image(s).

MidscnMatrix(mm)

Thck/SP(cm)SFOVImg Img Ctr Gntry

10.0/2

1

10.0/

512

(deg)

4

3

6

5

Archive

No

No

No

NoNo

No

TypeDescription Mod

Accept

Cancel

1 PROSP35123145 Jan 08 98

B.Fox18

�

�

Fmt A

S–IImg CtrR–L

Img CtrA–P

Res

50

50

50

50

50

50

CT CT

10.0/

10.0/

10.0/

10.0/

S 50.0S 45.0

+0.0

��

+0.0 512

512

512

512

512

+0.0

+0.0

+0.0

+0.0

Lung

Lung

Lung

Lung

Lung

Lung

S 40.0

S 35.0

S 30.0

S 25.5

R5.0R5.0

R5.0

R5.0

R5.0

R5.0

(mm)

A0.0A0.0

A0.0

A0.0

A0.0A0.0

Dec 23 97 CT



Dir. 2295148-100Rev. 0

List / Select 2

3. �Select exam, series and image to display.

4. �Click on the [Accept].

Once all images are loaded, the first image in the series will bedisplayed in a primary focus viewport (blue border).

5. �Use [Next] or [Prior] key on the keyboard to go through images forwardor backward.

Click on the [Cancel] to exit without selecting anything.



Routine Display 1

1. �Select [Routine Display] at the Exam Rx menu.

Routine Display

2. �The following Routine Display menu will appear.

Routine Display

ProView

GSE

ExplicitRoam

ZoomFlip/

Display List/

Ellipse Measure Grid

Cross User Exam Pg

Series Pg

HideErase Screen

Back

RotateMagnify

Normal Select

On/OffDistanceROI

AnnotationReference

SaveGraphics

3. �Click on [Back] to return to Exam Rx menu.

Function of each icon is described on the following pages.



Dir. 2295148-100Rev. 0

Routine Display 2

�Roam / Zoom

1. �Place the desired image in primary focus viewport.

2. �Select [Routine Display] at the Exam Rx menu to open the RoutineDisplay menu.

3. �Select [Roam] or [Zoom] on the Routine Display menu.

4. �After selecting [Roam], place the mouse cursor over the image you wishto roam and hold down the right mouse button, then move the mouse toroam the image. When you release the mouse button, the image will bedeposited on that point. Select [Display Normal] to return the image toits original position.

After selecting [Zoom], place the mouse cursor over the image you wishto zoom and hold down the right mouse button, then move the mouseright (or up) to magnify or left (or down) to minify the image. When yourelease the mouse button, the image will retain the zoom and themagnification factor will be displayed at the bottom of the annotation onthe upper right of the image. The valid magnification ranges are from0.5 to 8 and from1.0 to 4.0 in a 1024 matrix viewport.

Select [Display Normal] to return the image to its original size.



Routine Display 3

Explicit Magnify

This function allows you to numerically set an image magnification factor.

1. �Select [Routine Display] and click on [Explicit Magnify] on the RoutineDisplay menu.

2. �The following Enter Magnification on Factor menu appears.

Enter Magnification Factor

0.5 1.0 1.5 2.0 Other:

Valid magnification factors are between 0.5 and 8.0.

Cancel

3. �Select one of the preset magnification factors or type in your own.The valid ranges are from 0.5 to 8.0 and from1.0 to 4.0 in a 1024 matrixviewport.

4. �This magnification will be applied to all viewports in focus.

Select [Display Normal] to return the image to its original size.



Dir. 2295148-100Rev. 0

Routine Display 4

Flip/Rotate

1. �Place the desired image in primary focus and select [Routine Display].

2. �Select [Flip/Rotate] on the Routine Display menu.

3. �The following Flip/Rotate menu appears.

FLIP/ROTATEFLIP:

FLR FTB FTB/FLR

ROTATE:

RR RL

Cancel

4. �Select one from FLR (Flip Left to Right), FTB (Flip Top to Bottom),FTB/FLR, RR (Rotate to Right) or RL (Rotate to Left).

5. �This selection will be applied to all viewports in focus.

Select [Display Normal] to return the image to its original orientation.



Routine Display 5

ProView

This function allows you to select an edge enhancement or smoothing filterto be applied to images.

1. �Images must be in primary focus.

2. �Select [ProView] on the Routine Display menu.

3. �The following Select Image Filter menu appears.

Select Image Filter

Edge E1 E2 E21 Lung

S1 S11 S2 OffSmooth

Cancel

E22 E23 E3

S21 S3

4. �Click on any button of the selections.

The Edge enhancement filters are useful for filming bone windows. The Lungenhancement is designed specifically to film lung windows.

E1 : Weak E2 : Moderate E3 : Intense Lung : Lung window

Note : When a filter is applied, images are annotated as E1, E2, E3 or Lungabove the vertical tickmark scale on the right side of the image.

The Smooth filters are used to film soft tissue windows or when you need todecrease the appearance of noise on images.

S1 : Minimum S2 : Moderate S3 : Maximum Off : Without filter

Note : When a filter is applied, images are annotated as S1, S2 or S3 abovethe vertical tickmark scale on the right side of the image.

Note : These filters can also be selected on the Auto Film Tab card.

Note : These filters can not be applied to Scout images.



Dir. 2295148-100Rev. 0

Routine Display 6

GSE (Gray Scale Enhancement)

This function allows you to alter the slope and gamma curve. This is useful inhead studies to improve the gray–white matter differentiation.


2. �Select [GSE] on the Routine Display menu.

3. �The following Gray Scale menu appears.

Gray Scale

G1 G2 G3 Off

Cancel

4. �Click on any of the selections.

G1 : Weak G2 : Moderate G3 : Intense Off : No filter

Note : When a filter is applied, the image is annotated as G1, G2 or G3 justabove the vertical tickmark scale on the right side of the image.

Note : These filters can also be selected on the Auto Film Tab card.

Note : These filters can not be applied to Scout images.

Display Normal


2. �Select [Display Normal] to return an image to its normal state ifRoam/Zoom, Explicit Magnify, Flip/Rotate and ProView are used. It willalso erase graphics for Elliptical ROI, Measure Distance, Grid, CrossReference and User Annotations.



Routine Display 7

List / Select

1. �When you select [List/Select], the browser appears.

2. �You can then select an image to view in a viewport or viewports,depending on what is in focus. Simply select an Exam, Series andImage, then select [Accept].

Ellipse ROI


2. �Select [Ellipse ROI] to perform a Region Of Interest measurements.

3. �The ellipse ROI cursor will be displayed in blue (active) on the image.To move the ROI cursor, place the mouse cursor in the center of theellipse, then click and drag it with the left mouse button. The other wayto move the ROI cursor is to place the mouse cursor on the number nextto the ellipse or on the line, then click and drag it with the left mousebutton. To change the size, click and drag the small box outside theROI cursor. To rotate the ROI cursor, click and rotate the solid cursor onthe line.

4. �Place the mouse cursor out of the ellipse, then, click the left mousebutton once to calculate the ROI of the ellipse. The ellipse ROI cursorturns white (inactive) and is deposited there.

Note : Once the ellipse ROI cursor turns white, it can not be modified, butyou can turn it blue again by placing the mouse cursor inside the ROI cursorand click the left mouse button once. Then, you can change the size andlocation of the ROI cursor again.

The figures of the Mean, Standard Deviation and Area are displayed at thebottom right of the image. The ROI measurements can be done many times,but the system will display only the last three results on the image.

Select [Erase] to erase the ROI.



Dir. 2295148-100Rev. 0

Routine Display 8

Measure Distance


2. �Select [Measure Distance].

3. �A line with two small boxes at each end will appear in blue (active).

4. �To move the line, place the mouse cursor on the line and hold down theleft mouse button, then drag the line to a new location. To change thelength of the line, place the mouse cursor over the small box and holddown the left mouse button, then drag the box until you get a desiredlength.

5. �Place the mouse cursor out of the line, then, click the left mouse buttononce to calculate the length of the line. The line turns white (inactive)and is deposited there.

Note : Once the line turns white, it can not be modified, but you can turn itblue again by placing the mouse cursor on the line and click the left mousebutton once. Then, you can change the length and location of the line again.

At the bottom right of the image area, a real time readout of the distance willbe shown. The Distance measurement can be done many times, but thesystem will display only the last three results on the image.

Select [Erase] to erase the line.

Grid


2. �Select [Grid On/Off].

3. �The grid appears on the image.

4. �To move the grid, first click left on the center of the grid. It becomesactive (blue), then drag it to the desired position. To deposit the grid,click outside the grid.

5. �To take the grid off, click on [Grid On/Off] again.



Routine Display 9

Cross Reference

This function allows you to display the cross reference lines on a Scoutimage.

1. �Display a Scout image in primary focus.

2. �Select [Cross Reference]. The following Post Reference Lines menuappears.

Post Reference Lines

Series Number

Image Numbers All First/Last

Increment

OK Cancel

3. �[Series Number] : Enter the desired series number. [Image Number] : Enter the desired image number.[All] : Select this for all images. [First/Last] : Select this to show only the first and last image line. [Increment] : Select this to show image lines with incremental interval.

4. �Select [OK] to display the image lines on the Scout or select [Cancel] toexit.



Dir. 2295148-100Rev. 0

Routine Display 10

User Annotation


2. �Select [User Annotation] to show the following active (blue) arrow cursoron the image.

3. �You can move both the box and arrow at once by placing the mousecursor anywhere on the blue line, then click and hold down the leftmouse button, then move it. You can move just the arrow or box by thesame way except you would place the mouse cursor on just the areayou wish to move instead of the blue line.

4. �Type in the necessary information, then click the left mouse buttonoutside the box to conclude the type entry. Make sure when typing theannotation that the mouse cursor is inside the image area.



Routine Display 11

Exam Pg / Series Pg

1. �Select [Exam Pg] or [Series Pg] to open the exam page or series pageof the exam in primary focus.

2. �The following is an example.

Text Page Box

Pat. name: T. YOKOGAWAPat. ID: Y8120Age: 34 Sex: M Weight: 65 Kg

Referred by:Radiologist:Operator:Exam Description:History:Contrast:

Ser Images Ref Scan Range Type Series Description

2 18 OM S 50 I115 PROSP Recon2

3 26 SN I65 I350 PROSP

Quit Manual Film Auto Film

Exam no: 81293July 17 97

Use �� buttons on the lower right to go through pages.

3. �Select [Manual Film] to put the page into Manual Film Composer orselect [Auto Film] to put the page into Auto Film Composer.

4. �Select [Quit] to exit from the page.



Dir. 2295148-100Rev. 0

Routine Display 12

Hide/Show Graphics

1. �Select [Hide Graphics] to temporarily hide any graphics, annotation ormeasurement.

2. �The [Hide Graphics] button works as a toggle. Once you have selectedHide, then the button changes to [Show Graphics], allowing you to showany graphics, annotation or measurement.

Erase

The Erase function allows you to erase annotations, cursors andmeasurements.

To erase, simply click on [Erase]. If you have multiple annotations or cursorson the image, the erase function will erase the active one (blue).

Screen Save

Screen Save will save everything that is on the image in primary focus.


2. �Select [Screen Save].

Note : Screen Saved image will be kept under series number 99.



Measurements 1

[Measurements] provides access to the more advanced imagemeasurements

Measurements

Clicking on [Measurements] opens the following menu.

BoxROI

TraceROI

MeasureAngle

EllipseROI

MeasureDistance

GridOn/Off

HideGraphics

Erase ScreenSave

Back

MIROI ReportPixels



Dir. 2295148-100Rev. 0

Measurements 2

MIROI (Multiple Image ROI)

This function gives a graphical representation of CT number change overtime. This is useful for multiple scans done at one location or for segmentedreconstruction of a scan.


2. �Select [MIROI] from the Measurements menu.The following menu appears.

MIROI Analysis

Image Range All

Scale for HU Absolute Relative

Define Region Ellipse ROI Box ROI Trace ROI

OK Cancel

3. �The first selection on the menu is Image Range. The default is All.If you wish to select certain image range, first click on [All] to turn it off,then type in the number range.

4. �The next selection is Scale for HU (Hounsfield Units). The default isRelative, meaning the HU scale will display the first CT number as zeroand display the difference in CT numbers from one scan to another.The Absolute scale will display the actual CT numbers and thedifference from one scan to another.

5. �Define Region selection allows you to choose the Ellipse, Box or TraceROI.

6. �Choose [OK] to continue or [Cancel] to cancel the function.

Once you select [OK], the analysis will be automatically done with theresulting graph displayed.

You can use [Screen Save] to save the plotted graph.



Measurements 3

Report Pixels

This function allows you to get individual pixel values readings from a certainsmall area.

1. �Select [Report Pixel] from the Measurements menu.

2. �An 11x11 pixel box will appear along with the Report Pixels menu.The size of the pixel box can not be changed but you can move the boxto the desired location by clicking and dragging on the letters RP or onthe box itself.

3. �Once you placed the box, select [OK].

Report Pixels

Position Box and Select OK

OK Cancel

A graph like the following example will be displayed showing the pixel valueswithin the box.

Report PixelsID: 8120

I 84 I 85 I 86 I 87 I 88 I 89 I 90 I 91 I 92 I 93 I94

I 165I 166I 167I 168I 169I 170I 171I 172I 173I 174I 175

��

��

��

��

��

��

��

��

��

��

You can save this chart by [Screen Save].



Dir. 2295148-100Rev. 0

Display Preference 1

Display Preference provides access to functions that affect how images willbe displayed.

1. �Select [Display Preference] from the Exam Rx menu.

Display Preference

2. �The following Display Preference menu appears.

AnnotationLevels

Auto MinifyAutoEnlarge

InverseVideo

Next/PriorEachViewport

Next/PriorSeriesBinding

ContinuousReportCursor

��

�Not available) �Not available)




Annotation Levels

This function allows you to change the annotation levels of the screen andfilm.

1. �Select [Annotation Levels] from the Display Preference menu.The following menu appears.

Annotation Levels

Screen

No Annotation

Partial Annotation

Full Annotation

Custom Annotation

No Annotation

Partial Annotation

Full Annotation

Custom Annotation

Film

Customize Customize

Cancel

2. �You can change the annotation level by clicking on the diamond or thewords for Screen and Film. The selected choice will be highlighted inblue.

– No Annotation : Only window width and level

– Partial Annotation : Exam number, image number, anatomicreference, table location, patient name, date of exam, RAS coordinate,and the measuring scale

– Full Annotation : All image annotations (Default)

– Custom Annotation : Customized annotation



Dir. 2295148-100Rev. 0


3. �Select [Customize] to review or edit the annotation levels of AdvancedAnnotation. The following menu appears.

Customize

1. Hospital Name2. Patient Name3. Patient ID4. ESI Information5. Scan Time6. Scan Parameters7. View Parameters8. Top Marker9. Bottom Marker10. Left Marker11. Right MarkerW. WindowingG. Graphic Annotation

OK Cancel

4. �Click on � to select the items of annotation.




Next/Prior Each Viewport

This function is used with a multiple image display. With this function on,when you select to look at the next or prior set of images, you will only getone new image each time you select next or prior.

With this function off, selecting the next or prior image in the multiple imagedisplay will give you a new set of images. The default is off.

Next/Prior Series Binding

With this function on, you can go to the next or prior series within an exam ifyou reach the end of a series using the next or prior image functions.With this function off, when you reach the end of a series, selecting nextimage will return you to the first image of that series.

Continuous Report Cursor

This function allows you to see the RAS coordinates when you place themouse cursor on an image.

When the function is on, place the mouse cursor on the area of interest.The coordinate readout will be displayed at the bottom of the imageannotation, on the upper left of the viewport. You will notice a V, denoting theCT number of the one pixel located directly under the cursor.This information does not show up when filmed.



Dir. 2295148-100Rev. 0

Manual Film Composer

Refer to the later chapter for the detailed function description.

1. �Select [Manual Film Composer] from the Exam Rx Display menu.

[Manual FilmComposer]

2. �The following Film Composer will appear.

Laser CameraFormats

Film Composer

Options

Clear

Print

Current status is :



Auto Film Composer

Refer to the later chapter for the detailed function description.

1. �Select [Auto Film Composer]

[Auto FilmComposer]

2. �The following Auto Film Composer will appear.

Auto Film

Clear

Print



Dir. 2295148-100Rev. 0

Accelerator Bar 1

There is an Accelerator Bar at the bottom of the Exam Rx menu.

Accelerator Bar

You can type in here various commands to invoke various functions.

filter fi

gray scaleenhance

gse

e1, e2, e3, s1, s2, s3, lung, off

��

exam � � �!�"#$

image i i<image#>

next exam ne

next series ns

%�� !�" %�

screen annota-tion none an

&��' annota-tion partial

�%

&��'��''ta-tion full ��

&��'��''�(��'�&� �"

�&

�''��'��%

��% ')��*��!�!�!

��

�+�%�+��,� �+�

�+�%��%�-��"

��-

�""�'. �--��' �'��'�



Accelerator Bar 2

rotate left rl

rotate right rr

normal '

& &�++ !�%�!�+$� �%�!�+$

windowlevel

wl

��'.��.�,

��

��'��+��'.��'�

��

/" / ��&��$

�'��

�'�+� �'� !�$ �$ !�$ �$ !�$ �$

&� �� !� 0 1 �� #$

&� refappend

!��

&� �� '!�

��&2�"��2 �" '��

��&2�"��2��&�+

�"� '��

��&2�"��2,��/'��+

�", '��

��. ��. '��

� ��''� ��

�� %,�& ��

�� ++��%,�&

��

,�.��%,�& ,�

,��%,�& �

%��'�� %�

��!��%��!�"

��

�""�'. �--��' �'��'�

��!��%��

�

��!��%��

�%�



Dir. 2295148-100Rev. 0

Accelerator Bar 3

mouse modescroll

mmr

�""�'. �--��' Contents

mouse modezoom

mmz

user testpage ��%

�� -�'.�'� - '��

r imagematte �"��

e imagematte �"��

&��'� �� &' ��

-+�'2��%�� -+�'2

��%��%�!�+ �%

��'&��&��

��34 �,��&��"�� 4�'��'&��"��

Chapter 4


SCAN

Patient Positioning 1The scan procedure starts with patient positioning.Image quality depends on proper patient positioning.Poor patient positioning may result in artifacts and inaccurate CT value.

WARNING!

Avoid patient injury ! Use the security straps provided with the system toimmobilize the patient. The security straps secure the patient to the tableand prevent the patient from falling to the floor. Never leave a patientunattended while the patient is in the scan room. A violent patient maybreak the straps or become unsecured.

Be extremely careful with patient IV or oxygen lines, patient’s hands andfeet and loose clothing to avoid patient injury during table travel.

The cradle has a maximum distribution load capacity of 450 pounds (205Kg). Exceeding this load limit could affect some mechanical performance.

Scan


Dir. 2295148-100Rev. 0

Patient Positioning 2

1.�In order to safely lay a patient on the cradle, make sure first that thecradle is locked. (Refer to Chapter 1 for the function of Gantry DisplayPanel.)

Positioning lightInterference

TiltDistance from Landmark (mm)

�

��

X–ray On

Releasecradle lockDistance from iso–center On/Off

angle/range

� � � �

2.�Press a Positioning Light button on the Gantry Control Panel to light a

laser marker . (Refer to Chapter 1 for the function of Gantry ControlPanel.)

WARNING!

The laser beam used for patient positioning can cause eye injuries.Be sure to instruct a patient never to stare into the beam.

3.�Match the laser marker to an anatomical landmark of the patient byusing control buttons on the Gantry Control Panel.

Internallaser

��

��

190 mm

Tomographicplane

Patient positioning ends when the table location figure is displayed on thedisplay panel.

Scan


Patient Positioning 3

��Main landmarks for CT examination

The following landmarks are usually used in CT examinations.

��

��

�

��

��

��

��

��

��

GB : Glabella�

OM : Orbital Meatal line�

EM : External Auditory Meatus

SN : Sternal Notch�

XY : Xyphoid�

CM : Costal Margin

IC : Iliac Crest�

UB : Umbilicus

SP : Symphysis Pubis�

Scan


Dir. 2295148-100Rev. 0

New Patient 1

Select [New Patient] to initiate a new examination.

New Patient

1.�Select [New Patient] to open the following Patient Information/ProtocolSelection screen.

Patient Information

Exam Number

Accession Number

Patient ID

Patient Name

SexBirthdate

Age


Referring Physician

Radiologist

Operator

History

Exam Description

Protocol Number

EndExam

Protocol Selection

Req.Proc.ID

2.�Enter the patient demographic data.

Note : As a minimum, the patient ID must be entered.

– Exam Number : Within 12 characters

– Accession Number : Within 16 characters

– Patient ID : Within 16 characters

– Patient Name : Within 64 characters

Scan


New Patient 2

– Sex : M (Male) or F (Female)

– Birthdate : Year, Month, Day

– Age : Years, Months, Weeks, Days

– Weight : Kgs or Pounds

– Referring Physician : Within 32 characters

– Radiologist : Within 32 characters

– Operator : Within 3 characters

– History : Within 60 characters

– Exam Description : Within 22 characters

– Protocol Number : Within 5 characters

Note : Patient Name and Exam Description will be posted in Image WorksBrowser.

3.�Each of the ten anatomic regions contains 15 protocols. To select thedefault protocol for the region, point and click on the protocol next to thenumber. To view and select one of the 15 protocols for the region, pointand click on the region itself on the full body icon.

4.�When scanning a pediatric patient, the Pediatric Anatomical Selector isinitiated by touching the pediatric icon. This will minify the AdultAnatomical Selector.

Upon the selection of the protocol, the system automatically proceeds to theScout prescription screen on the next page.

Scan


Dir. 2295148-100Rev. 0

Scout Scan 1

Scout Prescription Screen

When you finish entering the necessary data on the New Patient screen, thefollowing screen will open for Scout scan prescription.

Name : ID :

Anatomical

Series Description

Select Next Create Repeat��

End One

Reference

Protocol :

Auto Transfer

AutoStore

AddScout

DeleteSelected

NewSeries Series

Scout

StartLoc.

EndLoc. kV mA Scout

Plane

AutoVoiceNo.

ScoutNum

1

ScanType

Scout

2 Scout

Image Area

Exam: Series:

Exam Protocol More��

Note : Make sure the patient’s position in the protocol you have selectedmatches that on the CT table. Compare your patient’s position with theon–screen picture in the upper left corner of the screen. Changes to thepatient’s position in the protocol can be made by Arrow icons on thepicture. In order to reverse the position of Head–first or Feet–first, point andclick on the icon. In order to change the position of Decubitus left/right orSupine/Prone, point and click on the or icon.

Before entering or modifying any starting or ending locations for a Scoutview, the system will determine if an anatomic reference point has beenestablished. If it has not, the starting and ending location parameters will behighlighted in red. To proceed, you must establish an anatomic referencepoint by using the internal or external landmark buttons on the gantry control.

Scan


Scout Scan 2

Image Area : Images will be displayed here. This image area can beenlarged to full screen by clicking on the small square icon located in theupper right corner.

Icons on Scout prescription screen

Add Scout

AddScout

Select this to add the same Scout as the last one.

Delete Selected Scout

DeleteSelectedScout

Select this to delete the selected Scout series.

End Exam

EndExam

Select this to end the current exam.

Select New Protocol

SelectNew

Protocol

Select this to return to the Protocol Selection screen and choose a newprotocol for a different region.

Next Series

NextSeries

Select this to choose a next series in the protocol.

Scan


Dir. 2295148-100Rev. 0

Scout Scan 3

Create New Series

CreateNew

Series

Select this to create a new series.

Repeat Series

RepeatSeries

Select this to repeat the current series.

One More

OneMore

Select this to repeat the current Scout series.

Confirm

Confirm

Select this icon to accept the prescription and proceed to X–ray radiation. This icon will change to the following [Pause] icon during the scan.

Pause

Pause

Select this icon to temporarily halt the scan. This icon will change to the[Resume] icon shown below during the pause.

Resume

Resume

Select this icon to resume the scan.

Scan


Scout Scan 4

1.�Enter or modify each parameter for a Scout scan.

– [Scan Type] : Select Scout.

– [Start Loc.] : Scan start location

– [End Loc.] : Scan end location

Note : Scout locations must be preceded with S (superior) or I(inferior). “Superior” means the direction towards patient’s head fromthe zero mm location, namely reference point. “Inferior” means thedirection towards patient’s feet from the zero mm location. Scoutscans are performed from the superior to the inferior regardless of thepatient position.

Note : The valid Scout scan range is between 50mm and 1000mm.

– [kV] : 80,120,140 kV�Default 120 kV�

– [mA] : 60–200mA (at 80 kV), 10–200 mA (at 120 kV), 10–160 mA (at 140 kV)

– [Scout Plane] : azimuth: 5–degree increment (However, to be able tographically prescribe axial or helical scan locations, the Scout planesmust be zero, 90, 180 or 270 degrees only.)

Note : If the data field is highlighted in orange, it means the original data hasbeen modified. Also, if the data field is highlighted in red, it means thesystem can not accept that entry.

2.�After entering or modifying parameters, select [Confirm] to initiate aScout scan. The following Scan Progress screen appears.

Scan Progress

EndExam

NextSeries

RepeatSeries

OneMore

PriorityRecon

RepeatLast

Group

0 10

SecondsNumber Type kV mA Start

S65.0001 120 80 S65.0 I120.0

Scanning Delay Timer Patient Handling

Pause

I120.0Scout

Plane End

0

Exam:128 Series:1

BiopsyRx

Scan


Dir. 2295148-100Rev. 0

Scout Scan 5

3.�Press [Move to Scan] button on the key board when it flashes.

Move to Scan Stop Move Start Scan Pause Stop Scan

Scan Related Buttons on the Keyboard

X–ray on

4.�Press [Start Scan] button when it is lit.

The system automatically starts the prescribed Scout scan.

Note : A scan will be automatically aborted unless you press [Stop Scan]within 30 seconds after it is lit.

5.�After finishing the first Scout scan, you may select [Repeat Series]button on the Scan Progress screen to repeat the same Scout series.

6.�If there is an axial series in the protocol you used, you can proceed toAxial/Helical View/Edit screen by clicking on [Next Series] button on theScan Progress screen.

7.�If you need to return to the Scout prescription screen, select thefollowing [Return to Rx] icon.

��

CAUTION

Measurements of Distance and/or Angle on the Scout image do notnecessarily yield accurate data. Do not use those data to avoidmisdiagnosis.

End of Scout scan

If you wish to end the exam after the Scout scan, select [End Exam] on theScan Progress screen.

Scan


Auto Store

Function : Auto Store enables you to automatically store images to themedia just after reconstruction.

First make sure that an archive medium is placed in the MOD drive.

MOD Drive

1.�Click on [Auto Store] on the Axial View/Edit screen.

Name : ID :

Anatomical

Series Description

Reference

Protocol :


ShowLocalizer

AutoStore

AutoStore

Exam: Series:

ReconArea

AutomA OFF

SmartReconOFF

2.�When Auto Store is on, all series will be automatically stored into theMOD after completion of reconstruction.

Scan


Dir. 2295148-100Rev. 0

Auto Transfer

Function : Auto Transfer enables you to automatically transfer reconstructedimages to another view station.

1.�Click on [Auto Transfer] on the Axial View/Edit screen to open the AutoTransfer Remote Host Selection menu.

OK

Host 1

Host 2

Host 3

Host 4

CT2CT3AW1AW2MR1MR2

Auto Transfer Remote Host Selection

Exam Image

Exam Image

Exam Image

Exam Image

CancelPrior Next

2.�After clicking on [Host x], select host(s) from the list to which you wish totransfer the data. You can select up to four hosts (Host1–Host4).

3.�After selecting host(s), choose either [Exam] or [Image] as the unit oftransfer data. Then, select [OK] to close the menu.

4.�In case of [Exam] selection, the system automatically starts to transferdata immediately after selecting [End Exam], whereas in case of [Image]the system automatically starts to transfer data immediately aftercompletion of reconstruction.

Note : This function can be applied to only Scout and prospective images.Other types of images, such as 3D, retrospective, or screen–saved, shouldbe manually transmitted.

Scan


Axial/Helical Scan Prescription 1

Axial/Helical Prescription (View/Edit) Screen

After Scout scan, you may proceed to the following Axial/Helical Prescriptionscreen to perform Axial, Helical or Cine scans.

Name : ID :

Anatomical

Prior Next

Series Description

New Next Create

Split

Repeat��

End

��

One

Reference

Protocol :


ShowLocalizer

AutoStore

AddGroup Current

Group

DeleteSelectedGroup

Images ScanType

StartLoc.

EndLoc.

No. ofImages

Thick(mm)


Tilt SFOV kV mA CTDIw


Select

Series Series More

Preview

Optimize

Exam Protocol

PriorityRecon

Rx

BiopsyRx

��

Exam: Series:

ReconArea

(mGy)

SmartPrep

SmartRecon

AutomA OFF

OFF

Image Area : Images will be displayed here. This image area can beenlarged to full screen by clicking on the small square icon located in theupper right corner.

Prior/Next : Prior or Next key appears on the screen only when more thanthree groups are prescribed.

Scan


Dir. 2295148-100Rev. 0


Continuous Scan Modes

This HiSpeed system provides continuous multiple 360–degree scan modescalled Helical or Cine.

Helical Scan : Continuous multiple 360–degree data acquisition is achievedwith continuous table travel. Images taken with this mode are annotated asHE (Helical).

Cine Scan : Continuous multiple 360–degree data acquisition is achievedwithout table travel. Images taken with this mode are annotated as CI (Cine).

Clinical Benefits of Helical/Cine Scans

� Scan speed

Since there is no interscan delay between each slice acquisition, scan speedis much faster than conventional axial scans.

Faster scan also helps reduce the total amount of contrast agent.

� No misregistration of anatomy

Since one scan sequence is performed during patient’s breath hold, itcontributes to very little misregistration of anatomy.

Scan



Prescribe Scan Parameters

1.�Enter the parameters or modify them in the protocol if necessary.The following screen appears as default or when you click on the [Scan]icon. The screen changes when you click on the [Timing], [Recon] or[Film] icon to each own parameters one.

New Next Create

Split

Repeat��

��

End One

AddGroup Current

Group

DeleteSelectedGroup

Images ScanType

StartLoc.

EndLoc.

No. ofImages

Thick(mm)


TiltSFOV kV mA

CTDIw


Select

Series Series More

Preview

Optimize

Exam ProtocolPriorityRecon

Rx

BiopsyRx

��

(mGy)

SmartPrep

� When you wish to use the common parameters for all scan groups as toScan Type, Thick, Image Int’val, Pitch, Gantry Tilt, SFOV, kV or mA, clickon each column head and then select the alternative.

� When you wish to select parameters separately for each group, click oneach data field.

� Each parameter is described on the following page.

Scan


Dir. 2295148-100Rev. 0


– [Scan Type]��Click here to open the following menu. (Your system may not have [0.8] Rotation Time.)

Select the desired Scan Type

Scan Type Axial Helical Cine

Rotation Time 1.0 2.0 3.0

Rotation Length Segment Full

1.50.8

Plus

OK Cancel

Scan Type: Axial, Helical�� Cine

Rotation Time (second): Time needed for 360–degree rotation ( “3.0” unavailable for Helical)

Rotation Length: Amount of data for one scan(Smart Helical option offers [Plus] that uses 1.6–rotation data.)

– [Start Loc.] : Scan start location preceded with S (Superior) or I (Inferior). 0.1 increment with Helical

– [End Loc]��Scan end location preceded with S (Superior) or I (Inferior). 0.1 increment with Helical

– [No. of Images]��The number of images will be automatically calculated in the end of data entry.

– [Thick (mm)] : Slice thickness: 1, 2, 3, 5, 7, 10 mm

– [Image Int’val] : Image interval

– [Pitch] : The ratio between the slice thickness and the distance acradle travels during one rotation time in Helical scan (0.1 increment)

– [Gantry Tilt] : � 30 degrees (by 0.5 degrees)

– [SFOV] : Scan Field of View: Ped–Head (18 cm), Head (25 cm), Small (25 cm), Medium (35cm), Large (50cm), Shoulder–L (50 cm)

– [kV] : 80, 120, 140 kV

– [mA] : 60–300(350) mA (at 80 kV), 10–300(350) mA (at 120 kV)� 10–250 mA (at 140 kV), 5 mA increment

– [CTDIw] : Dose index for each group will be automatically calculated and shown.

Scan



2.�Click on the [Timing] icon to open the following time parameters menu.

PrepGroup

ISD(sec)

BreathHold(sec)

BreatheTime

AutoVoiceNo.


(sec) (sec)

Click on each parameter item and select or type in the value.

– [Prep Group (Delay)] : Delay time between pressing [Start Scan]button and the start of X–ray radiation (0–360 seconds)

– [ISD] : Inter–scan delay (1–300 seconds)

– [Breath Hold] :�Duration in which a patient is required to hold breath

– [Breathe Time]��Patient breathing time

– [Auto Voice No.] :�Auto Voice setting number

Scan


Dir. 2295148-100Rev. 0


3.�Click on the [Recon] icon to open the following reconstructionparameters menu.

DFOV


(cm)R/L

Center(mm)

A/PCenter(mm)

ReconType

ImageFilter

MatrixSize

MotionCorrect

SpecialFilter

ShowRecon1

ShowRecon2

ShowRecon3

Y N N

Click on each parameter item and select or type in the value.

– [DFOV] :�Display Field of View: 48–500 mm (by 1 mm)

– [R/L Center] :�Reconstruction center in the right or left direction preceded with R (Right) or L (Left)

– [A/P Center] :�Reconstruction center in the anterior or posterior direction preceded with A (Anterior) or P (Posterior)

– [Recon Type] :�SOFT, STND, STD+, DETL, CHST, BONE, EDGE or PFRM

– [Image Filters] :�Smooth (S1, S11, S2, S21, S3), Edge (E1, E2, E21, E22, E23, E3), Lung (L1, L2, L3)Note : These filters are not available when CHST is selected at [ReconType].

– [Matrix Size] :�256�256 or 512�512

– [Motion Correct] : Motion correction

Note : Motion Correct does not apply to the following cases.Helical/Cine scans and Segment Rotation Length

Scan



– [Special Filter] : ANR (Advanced Noise Reduction) (1 or 2) AAR (Advanced Artifact Reduction) (1 or 2)

ANR filter allows you to reduce noise without compromising spatialresolution. It contributes to a decrease in standard deviation byapproximately 10%, which may be equivalent to one–step decrease inmA. Note : ANR is compatible only with SOFT, STND, STD+.

AAR filter allows you to reduce artifacts shown around arms.




[ANR 2] has a stronger effect than [ANR 1]. Also, [AAR 2] has astronger effect than [AAR 1]. Select either of them or select [None]not to use this filter.

– [Show Recon 1, 2, 3] : These buttons are used for prospective multiple reconstruction.

Scan


Dir. 2295148-100Rev. 0


4.�Click on the [Film] icon to open the following menu for auto filming.You may skip this procedure if you do not use autofilm.


AutoFilm

FrameFormat


Level1

MagFactor Rotate User

Anno.GSE

Recon 1Film Set

1

Recon 1Film Set

2

Recon 2Film Set

1

Recon 2Film Set

2

Recon 3Film Set

1

Recon 3Film Set

2

Click on each button to enter or select data.

– [Auto Film] :�Toggle between autofilm On and Off.

– [Frame Format] :�Four formats

– [Interval] : 1–5 sheets

– [Flip] : FTB (Flip to Bottom), FTB/FLR (Flip to Bottom/Flip to Left Right), FLR (Flip Left Right)

– [Width 1] : First choice of window width (1–4,096)

– [Level 1] :�First choice of window level (–1,024 to 3,072)

– [Mag Factor] : 0.5–2.0 times

– [Rotate] :�Left 90 degrees, right 90 degrees, 180 degrees

– [User Anno] : User annotation

– [GSE] :�Gray Scale Enhancement (G1, G2, G3, Off)

Scan


Axial/Helical Scan Prescription 9Prospective Multiple Reconstruction

Function : This enables you to prospectively prescribe up to two additionalreconstruction sets for each scan group within one series.

Make sure that the [Recon] icon is selected on the right side of View/Editscreen to prescribe Prospective Multiple Reconstruction.

DFOV


(cm)

R/LCenter(mm)

A/PCenter(mm)

ReconType

ImageFilter

MatrixSize

MotionCorrect

SpecialFilter

ShowRecon1

ShowRecon2

ShowRecon3

Y N N

ReconY/N

N

N

There are three buttons at the bottom of the Recon menu.They are [Show Recon 1], [Show Recon 2] and [Show Recon 3].[Show Recon1 Y] is highlighted in blue and contains recon parametersprescribed beforehand.

1.�Select [Show Recon2 N] to prescribe the second recon set.

2.�Once [Show Recon2 N ] is selected, there appears [Recon Y/N] columnat the left end of the Recon menu. These parameters are default fromRecon1. You may change some or all of those parameters. The alteredparameters will become those of Recon2. Lastly, toggle N (No) to Y(Yes) to allow the group to be reconstructed with those parameters.[Show Recon2 N] will be changed to [Show Recon2 Y] and highlightedin blue.

– [DFOV] :�Display Field of View: 48–500 mm (by 1 mm)

– [R/L Center] :�Reconstruction center in the right or left direction preceded with R (Right) or L (Left)

– [A/P Center] :�Reconstruction center in the anterior or posterior direction preceded with A (Anterior) or P (Posterior)

Scan


Dir. 2295148-100Rev. 0

Axial/Helical Scan Prescription 10Prospective Multiple Reconstruction

– [Recon Type] :�SOFT, STND, STD+, DETL, CHEST, BONE, EDGE or PERM

– [Image Filters] :�Smooth (S1, S11, S2, S21, S3), Edge (E1, E2, E21, E22, E23, E3), Lung (L1, L2, L3)

– [Matrix Size] :�256�256 or 512�512

– [Motion Correct] : Motion correction

– [Special Filter] : ANR (Advanced Noise Reduction) (1 or 2) AAR (Advanced Artifact Reduction) (1 or 2)

ANR filter allows you to reduce noise without compromising spatialresolution. It contributes to a decrease in standard deviation byapproximately 10%, which may be equivalent to one–step decrease inmA. Note : ANR is compatible only with SOFT, STND, STD+.

AAR filter allows you to reduce artifacts shown around arms.




[ANR 2] has a stronger effect than [ANR 1]. Also, [AAR 2] has astronger effect than [AAR 1]. Select either of them or select [None]not to use this filter.

When you need to return to the parameters of Recon1 , simply select [ShowRecon1].

3.�If you need to perform the third reconstruction, select [Show Recon3],then take the same steps as Recon2.

4.�Select [Confirm] to initiate a scan.

Note : During the scan, only the set of Recon1 will be reconstructed. In orderto activate Recon2 or 3, select any of the following buttons.[End Exam], [Create New Series], [Next Series], [Select New Protocol],or [Repeat Series]

Scan



Icons of the Axial/Helical Scan Prescription screen (1)

Autofilm Setup

AutofilmSetup

Select this icon to open the following menu for autofilming.

Laser Camera

OK

Autofilm Setup

Destination

Format Size

Normal Slide

Copies

�

Film Direction

Top to Bottom

Auto Start Auto Print

Yes Yes

Exam Page Series Page

Yes Yes

Scout XRef–Scout

Auto Film Composer

e/s/i

Show Grayscale

Yes

Cancel

Please refer to the later chapter of Filming for detailed descriptions.

Show Localizer

ShowLocalizer

Click this icon to display the Scout image with graphical lines that show thescan locations prescribed beforehand. You can graphically modify thestart/end location, interval, image number, or DFOV. Those changes will bereflected on the scan prescription screen in orange color.

Please refer to the later pages for detailed descriptions.

Scan


Dir. 2295148-100Rev. 0


Recon Area

ReconArea

Select this to display a circle cursor over the image, then change the sizeand location of the cursor to designate the recon area instead of typing inDFOV, R/L Center and A/P Center at the Axial/Prescription screen.

Add Group

AddGroup

First select a certain scan group, then click on this to add that group justafter the current group.

Split Current Group

SplitCurrentGroup

Select this to split the selected scan group.

1.�First select the desired scan group you wish to split.

2.�Then, click on the above icon to open the following menu.

Split Group

Enter location or image number

OK Cancel

3.�Enter the location or image number at which you wish to split the group.Then, select [OK].

Note : If you enter an invalid number, the warning message will appear.“Image number is outside of group image range.”

Scan



Delete Selected Group

DeleteSelectedGroup

First, select a scan group that you wish to delete, then click on this.

Biospy Rx

BiopsyRx

Select this to prescribe Biopsy Rx.

Refer to the later pages for the function description of Biopsy Rx.

Smart Prep

PrepSmart

Select this to prescribe Smart Prep.

Refer to the later pages for the function description of Smart Prep.

Scan


Dir. 2295148-100Rev. 0


Optimize Rx

Optimize

Rx

When the system decides that some change in scan techniques is needed tocomplete the entire scan, this icon lights up in red. At this point you mayenter the following Technique Optimize screen by clicking on it.

Tube cooling is needed at image ; 26

Optimize Method :

Group byGroup

UpfrontDelay(sec) mA

240

GroupDelay(sec)

Image

1–45

46–65

Technique Optimize screen example

Tube cooling is needed at image : At the top of the screen the messageappears that informs you at which image the tube cooling will be needed withthe current scan techniques. In the above example it is 26.

Optimize Method : Optimize Method tells you how the change in techniquewill occur. In the above example it says “Group by Group” meaning thetechnique must be changed by scan group. Also, in the above example,since the image 26 belongs to the first group, all the images in the first groupfrom 1 to 45 are equally subject to changes in technique. The system willcalculate and display up to three factors for the scans to be able to continue.Those three factors are;

– Upfront Delay (sec) :�Pre–scan delay

– mA :�Tube current used for that scan group

– Group Delay (sec) :�Delay time between scan groups

Rectifying any one of those three factors will display a message “Tubecooling is No Longer Needed” enabling the system to continue scans.

Notice: When the system estimates the cooling time to be more than 600seconds, it shows “––” in the [Upfront Delay] box.

Finally select [Optimize in Progress] highlighted in blue to exit.

Scan



Preview

Preview

This function enables you to graphically view prior to the scan the interactionbetween scan process and the combination of Breath Hold and BreatheTime.

When you click on this button after axial scan prescriptions, the followingscreen appears.

0 10 30 40

SecondsImages Type kV mA Time Thk Tilt Start

001–010 120 250 10.0 5 S80.0 S30.0S80.0 S30.0

BiopsyRx

20End

S0.0Helical

Preview Screen

011–022 120 250 12.0 5 S10.0S0.0Helical I50.0

023–027 120 250 5.0 5 I60.0S0.0Helical I85.0

S10.0 I50.0

I60.0 I85.0

Prior Next

ScrollStep

If the prescribed scan sequence is too long for a displayed time scale, useStep or Scroll button to view the entire sequence for the corresponding timescale. (Step/Scroll buttons appear on the screen only when too long scansequence is prescribed.)

When more than three groups are prescribed, use Prior or Next key to gothrough the pages. (Prior or Next key appears on the screen only when morethan three groups are prescribed.)

Scan


Dir. 2295148-100Rev. 0


Icons of the Axial/Helical Scan Prescription screen (2)

End Exam

EndExam

Select this to end the current exam.

Select New Protocol

SelectNew

Protocol

Click on this to select another protocol.

Next Series

NextSeries

Click on this to select another series within the protocol. Please refer to thelater page for the function description.

Create New Series

CreateNew

Series

Select this to open the following menu and create a new series that does notexist in a protocol.


OK Cancel

Scout Axial

ATTENTION: This will remove all unscanned groups.

Scan



Repeat Series

RepeatSeries

Select this to repeat the current series. Please refer to the later page for thefunction description.

Priority Recon

PriorityRecon

Select this to give the priority to a certain image to be reconstructed earlierthan other images. Refer to the later page for the details.

One More

OneMore

Select this to repeat the last one scan. Please refer to the later page for thefunction description.

Confirm

Confirm

Select this icon to proceed to X–ray radiation after confirming all scanprescriptions. This icon will change to the [Pause] icon shown below duringthe scan.

Scan


Dir. 2295148-100Rev. 0


Pause

Pause

Select this icon to temporarily halt the scan. Scans pause after completingthe current one scan. This icon will change to the [Resume] icon shownbelow. (Note : It is best to use the Stop Scan button on the key board to stopthe scan immediately. The use of the Pause icon may not stop the scanimmediately due to the signal transmission timelag.)

Resume

Resume

Select this icon to resume the scan.

Intravenous contrast icon

��

Select this icon when you use intravenous contrast agent.

Gastrointestinal contrast icon

��

Select this icon when you use gastrointestinal contrast agent.

Scan


Axial/Helical Scan Prescription 19Show Localizer

Function : Show Localizer allows you to graphically show the prescribedscan lines on the Scout image.

1.�Click on [Show Localizer] located on the upper left corner of theView/Edit screen.

Name : ID :

Anatomical

Series Description

Reference

Protocol :


ShowLocalizer

AutoStore

ShowLocalizer

View/Edit screen

Exam: Series:

ReconArea

AutomA OFF

SmartReconOFF

2.�The Scout image appears with lines that show prescribed scan locations.

3.�In order to adjust the slice location, click and hold on the “X” mark inblue, then drag the entire group horizontally to the desired location.

4.�In order to adjust the DFOV center, click and hold on the “X” mark in bluewith the Shift key pressed down, then drag the entire group vertically tothe desired location.

Scan


Dir. 2295148-100Rev. 0

Axial/Helical Scan Prescription 20Show Localizer

5.�In order to adjust the location of only one group, first doubleclick on thegroup to select, then do the above operation. (When you select a certaingroup by doubleclicking on it, it turns blue.)

6.�In order to add or delete a slice at the top of the group, click and hold onthe small blue solid square and move the mouse to the desireddirection.

If you wish to add or delete a slice at the bottom of the group, click andhold on the small blue hollow square and move the mouse to thedesired direction.

7.�In order to adjust the size of DFOV, click and hold on the small diamond,then extend it or contract it.

8.�In order to adjust the gantry tilt, click and hold on the small circle, then tiltit to the desired angle.

Note : Blue lines on the axial images show the mechanical center (thepair of two slices) of the detector, not the slice.

Note : When the gantry tilt is applied on the Localizer, the last image ineach scan group will be automatically removed. This is because with the matrix type detector tilting the gantry increasesslice intervals which cause the slice overlaps between groups as thesystem keeps the original start locations for each scan group. To avoidthe slice overlaps the system automatically removes the slice(s)depending on the scan mode and the tilt angle.

Scan


Axial/Helical Scan Prescription 21Auto mA

Function : The Auto mA feature enables the system to reduce mA andpatient dose with negligible effect on image quality. The system varies mAaccording to patient shape and a predetermined algorithm for scan location.

Principle : The Auto mA feature requires one Scout scan, either AP or LATin the diagram below, to obtain necessary information on X–ray attenuation.

��

�� !��"#�$

%!&�

%!&�

'�� !��"(#%$

The system automatically increases mA at the scan locations where X–rayattenuation is relatively high and decreases mA at the scan locations whereX–ray attenuation is relatively low. In the example below, the mA is set low atthe start scan location (lung area), then the mA will increase at the locationof liver area, then it will decline at the location of abdomen area.

�

)#

��

��

��

CTDIW : CTDIW is displayed by using pre–programmed loading factors thatdetermine the maximum possible CTDIW. If you need to know CTDIW for eachAxial scan group, first confirm the mA in “mA Table” for Auto mA Clipping,then calculate CTDIW according to the way mentioned at the CTDIW sectionin Chapter 6.

Scan


Dir. 2295148-100Rev. 0


Prescribe Auto mA

One Scout data is necessary to prescribe the Auto mA.(Note : When more than one Scout scan is available like AP and LAT, theAuto mA feature uses the last Scout scan as the necessary data.)

1.�Click on the [AutomA OFF] located on the upper left corner of theView/Edit screen. (Default setting is “OFF“.)

Name : ID :

Anatomical

Series Description

Reference

Protocol :


ShowLocalizer

AutoStore

AutomA OFF

View/Edit screen

Exam: Series:

ReconArea

AutomA OFF

SmartReconOFF

2.�The following [Select AutomA Mode] menu appears.

LowDoseNormalIQOff MaxmA Cancel

Select AutomA Mode

Select one of the four modes, IQ, Normal, LowDose or MaxmA. The menu disappears upon the selection.

– [IQ] : Select this mode when high image quality is needed. The possible highest mA of this mode is the highest among IQ,Normal and LowDose modes.[AutomA OFF] will change to [AutomA IQ].

– [Normal] : This mode is most commonly recommended.[AutomA OFF] will change to [AutomA Normal].

Scan



– [LowDose] : Select this mode when the lowest patient dose isrequired. The possible highest mA of this mode is the lowest amongIQ, Normal and LowDose modes.[AutomA OFF] will change to [AutomA LOWDOSE].

– [MaxmA] : Select this mode to define your own desired maximum mAother than IQ, Normal or LowDose mode.

– [Off] : Select this when you wish to end any of AutomA modes afterusing it.

– [Cancel] : Select this to cancel the AutomA mode.

Automatic mA Range Selection

In case of [IQ], [Normal] or [LowDose] mode:

The system calculates proper Auto mA values and draws a chart like thebelow one (The chart is not displayed on the screen.). Based on this chart,the system automatically applies either one of the two mA ranges (10–190mA / 100–maximum mA ) to each scan group.

Auto mA Calculation (example)mA

100

10scan location

200

The two ranges do not alternate with each other within a single scan group.In some cases this causes the system–calculated mA to be clipped(cut) for acertain slice. The following are examples.

Example 1 : With the [10–190mA] range selected, even if 210mA iscalculated for a certain slice, only 190mA will be applied to the slice. In other words, mA values more than 190mA are clipped.

Example 2 : With the [100–max.mA] range selected, even if 80mA iscalculated for a certain slice, 100mA will be applied to the slice. In other words, mA values less than 100mA are clipped.

Scan


Dir. 2295148-100Rev. 0


Auto mA Clipping

The CT operator can intentionally set the upper limit of mA in the modes ofIQ, Normal and LowDose. This feature is useful for tube cooling wait.Enter the desired mA value into the [mA] field. The following charts show the example of Clipping by Operator at 200mA.

mA

100

50

150

200

250

300

Slice 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Without Clipping (example)

Clipping by Operator @200mA (example)

mA

100

50

150

200

250

300

Slice 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Automatic Max mA Range Selection

In case of [MaxmA] mode:

Based on the mA value prescribed at [MaxmA] mode, the systemautomatically selects either one of the two mA ranges as the below chartshows.

mA input

10–190 10–190

Automatically selected range

200–max. 100–max.

Scan



The status of ON/OFF or mode of the AutomA feature is shown onthe bottom of the Preview screen.

3.�The following menu appears upon the selection of [mA] on the View/Editscreen.

)#�%�&�*��+,�+��,��*��-�.� ��

��/��)#

When [AutomA OFF] is posted, the [mA Table] key looks dimindicating it is not functional.

Select or enter the desired maximum mA.

When any one of four modes (IQ, Normal, LowDose, MaxmA) isselected, all mA choice boxes look dim, whereas the [mA Table] keylooks solid. Click on the [mA Table] key to open the following mATable Information menu.

)#

�

+

*

0

,

.

1

-

'

��

��

�2

�,�

�,�

�,�

�0�

�0�

�*�

��

��

��

��

��

)#�%�&��3 �)��

��4

"��)5�$

The above menu shows the expected mA at each scan location.Click on [OK] to close the menu.

Scan


Dir. 2295148-100Rev. 0

Axial/Helical Scan Prescription 26SmartRecon (Option)

Function : The SmartRecon feature can be used along with Helical or Cinescans to generate real–time reconstructed images at the rate of six imagesper second with 256x256 matrix.

Notice : Images taken with the SmartRecon feature are not recommendedfor diagnosis since 256x256 matrix is used.

Conditions :

� 512x512 matrix is not available for SmartRecon.

� SmartRecon can not be used for ordinary axial scans.

� SmartRecon is always succeeded by ordinary prospective reconstruction.(SmartRecon can not be prescribed alone.)

� SmartRecon is prescribed by series.

� The available scan time for SmartRecon is 0.8 or 1.0 second.

� While performing SmartRecon, the system halts all network and archivingtasks, also all image analyses like 3D, Reformat, etc. are suspended.

� During SmartRecon all the function buttons on the desktop except for[Shut Down] are not usable.

� Images generated by SmartRecon will not be stored into the system diskbut into the memory buffer.

� The AutomA feature can be applied to SmartRecon.

� The [Priority Recon] button can not be applied to SmartRecon.

Scan


Axial/Helical Scan Prescription 27SmartRecon (Option)

1.�Click on [SmartRecon OFF] located on the upper left corner of theView/Edit screen. (Default setting is “OFF“.)

Name : ID :

Anatomical

Series Description

Reference

Protocol :


ShowLocalizer

AutoStore

View/Edit screen

Exam: Series:

ReconArea

AutomA OFF

SmartReconOFF

SmartReconOFF

[SmartRecon OFF] turns to [SmartRecon ON].

2.�As the Helical or Cine scans proceed, the system reconstructs anddisplays images at the rate of six images/second.

3.�Upon the completion of the SmartRecon the operator may return to theView/Edit screen to start the prospective reconstruction.

Scan


Dir. 2295148-100Rev. 0

Axial/Helical Scan in Progress

1.�Click on the [Confirm] icon after confirming all prescribed scanparameters.

Select Next Create RepeatNewProtocol

NewSeries

End

Confirm

One Priority

Confirm��67��

Series SeriesExam ReconMore

2.�Press the [Move to Scan] button when lit, then, press the [Start Scan]button to start a scan.

3.�The system automatically proceeds to the Scan Progress screen.

Scan Progress

RepeatSeries

OneMore

RepeatLast

Group

Pause

0 10 30 40



S80.0 S30.0

BiopsyRx

20End

EndExam

NextSeries

PriorityRecon

Exam:285 Series:2

001–010 120 250 10.0 5 S80.0 S30.0S0.0Helical

011–022 120 250 12.0 5 S10.0S0.0Helical I50.0

023–027 120 250 5.0 5 I60.0S0.0Helical I85.0

S10.0 I50.0

I60.0 I85.0

Note : A warning message will appear in the Patient Handling box if thethe scanning object is off center.

Note : A scan will be automatically aborted unless you press [StartScan] within 30 seconds after it is lit.

4.�The system automatically performs the prescribed axial or helical scan.You can monitor the progress of the scan on the above Scan Progressscreen.

Scan


Axial/Helical Scan End

Upon the completion of the scan, the message “All scans completed” willappear in the Scanning box of Scan Progress screen. If you wish to end thecurrent exam here, take the following steps.

1.�After the scan, click on [End Exam] located on the lower left corner ofthe Scan Progress screen.

Scan Progress

EndExam

RepeatSeries

OneMore

PriorityRecon

RepeatLast

Group


BiopsyRx

End Exam

All scans completed.

NextSeries

Exam:285 Series:20 10 30 40


20End

023–027 120 250 5.0 5 I60.0S0.0Helical I85.0I60.0 I85.0

2.�Or, you may select “Return to View/Edit screen” icon located on the rightside of Scan Progress screen to return to the View/Edit screen.�

�� Return to View/Edit screen

3.�Select [End Exam] on the lower left corner of the View/Edit screen toend the current exam. The screen automatically returns to Top Levelscreen.

Scan


Dir. 2295148-100Rev. 0

Priority Recon

Function : Priority Recon allows you to designate and reconstruct an imageearlier than any other image in the reconstruction queue. Upon the selectionof this function, the system will start to reconstruct the designated image justafter reconstructing the current image.

1.�In the scan process, if you wish to reconstruct a certain image earlierthan any other image, select [Priority Recon] located on the bottom rightof Scan Progress screen.

Scan Progress


BiopsyRx

Priority Recon

EndExam

RepeatSeries

OneMore

PriorityRecon

RepeatLast

Group

NextSeries

Exam:285 Series:20 10 30 40


20End

023–027 120 250 5.0 5 I60.0S0.0Helical I85.0I60.0 I85.0

Pause

The system starts to reconstruct the designated image just aftercompletion of the current reconstruction.

2.�After completion of the whole scan, if you wish to give the reconstructionpriority to the lastly scanned image, select [Priority Recon] on thebottom right of the View/Edit screen.

SelectNext Create RepeatNew

ProtocolNew

Series

End

Confirm

OneMore

Priority

Priority Recon��67��

Series SeriesExam Recon

Scan


Next Series

Function : Next Series allows you to directly proceed to a scan prescriptionscreen if the next axial or helical series is included in the protocol.

1.�Click on [Next Series] on the following scan end screen.

Scan Progress


BiopsyRx

Next Series


EndExam

RepeatSeries

OneMore

PriorityRecon

RepeatLast

Group

NextSeries

Exam:285 Series:20 10 30 40


20End

023–027 120 250 5.0 5 I60.0S0.0Helical I85.0I60.0 I85.0

2.�The system automatically proceeds to the View/Edit screen that showsthe parameters of the series in the protocol. You may modifyparameters.

NewNext Create

Split

Repeat��

End

��

One

AddGroup Current

Group

DeleteSelectedGroup

Images ScanType

StartLoc.

EndLoc.

No. ofImages

Thick(mm)


TiltSFOV kV mA


Select

Series Series More

Preview

Optimize

Exam Protocol

PriorityRecon

Rx

BiopsyRx

CTDIw(mGy)

��67��

3.�After confirming the parameters, select [Confirm] to start scan.

Scan


Dir. 2295148-100Rev. 0

Repeat Series 1

Function : Repeat Series allows you to select any one of the previouslyscanned series within the same exam.

1.�Click on [Repeat Series] on the following scan end screen.

Scan Progress


BiopsyRx

Repeat Series


EndExam

RepeatSeries

OneMore

PriorityRecon

RepeatLast

Group

NextSeries

Exam:285 Series:2

0 10 30 40


20End

023–027 120 250 5.0 5 I60.0S0.0Helical I85.0I60.0 I85.0

2.�There appears the following Select Previous Series menu which lists allthe previously scanned series that have the same Patient Position/Orientation (supine/prone, head first/feet first) as the most recentlyscanned one. The most recently scanned series tops the list and getshighlighted.

Select Previous Series

OK Cancel

Series 8

Series 7

Series 6

Series 5

Series 4

Series 3

Description of Series 8






Highlighted

The list can show up to ten series on one screen. When it containsmore than ten series, there appear(s) Prior and/or Next button on thescreen.

Scan


Repeat Series 2

After selecting and highlighting any one of the series, select [OK] toconfirm the selection. To cancel this step, click on [Cancel].

3.�After the selection of [OK], the system automatically proceeds to theView/Edit screen that shows the parameters of the series chosen in theSelect Previous Series menu. You may modify parameters here.

NewNext Create

Split

Repeat��

End

��

One

AddGroup Current

Group

DeleteSelectedGroup

Images ScanType

StartLoc.

EndLoc.

No. ofImages

Thick(mm)


TiltSFOV kV mA


Select

Series Series More

Preview

Optimize

Exam Protocol

PriorityRecon

Rx

BiopsyRx

CTDIw(mGy)

��67��

4.�After confirming the parameters, select [Confirm] to start scan.

Scan


Dir. 2295148-100Rev. 0

One More

Function : One More allows you to scan one more slice that will haveexactly the same parameters as the most recently scanned image.

1.�Click on [One More] on the following scan end screen.

Scan Progress


BiopsyRx

One More


EndExam

RepeatSeries

OneMore

PriorityRecon

RepeatLast

Group

NextSeries

Exam:285 Series:20 10 30 40


20End

023–027 120 250 5.0 5 I60.0S0.0Helical I85.0I60.0 I85.0

2.�Press [Move to Scan] button when lit.

3.�Then, press [Start Scan] button when lit to start a scan.

Scan


Repeat Last Group

Function : Repeat Last Group allows you to scan the most recently scannedgroup again with the same condition.

1.�Click on [Repeat Last Group] on the following scan end screen.

Scan Progress


BiopsyRx

Repeat Last Group


EndExam

RepeatSeries

OneMore

PriorityRecon

RepeatLast

Group

NextSeries

Exam:285 Series:20 10 30 40


20End

023–027 120 250 5.0 5 I60.0S0.0Helical I85.0I60.0 I85.0

2.�Press [Move to Scan] button when lit.

3.�Then, press [Start Scan] button when lit to start a scan.

Note : Newly scanned series will have the same series number as theprevious one.

Scan


Dir. 2295148-100Rev. 0

Biopsy Scan 1

Function : The Biopsy Rx feature allows you to easily repeat the scanlocation during the biopsy procedures.

Biopsy Rx prescription

1.�Biopsy Rx can be accessed through the [Biopsy Rx] icon on the rightside of Axial/Helical Prescription screen.

Repeat One

Thick(mm)


TiltSFOV kV mA

CTDIw


Series More

Preview

Optimize

PriorityRecon

Rx

BiopsyRx

��

(mGy)

SmartPrep

BiopsyRx

2.�The following screen appears upon the selection of [Biopsy Rx].

Biopsy Rx

Biopsy Reference Superior Centered Inferior

Biopsy Location Get AlignmentLight Location Internal External

Number of Images Gantry Tilt

Thickness

Helical Pitch Image Interval

ConfirmBiopsy Rx Cancel

Scan


Biopsy Scan 2

3.�In order to determine the reference centering location in a biopsy scan,select [Superior], [Centered] or [Inferior] at Biopsy Reference field.

[Superior] means scanning from the landmark toward patient’s head.

[Centered] means scanning around the landmark.

[Inferior] means scanning from the landmark toward patient’s feet.

4.�At Biopsy Location field, enter the location of the biopsy scan to beperformed.

Or

5.�When the internal light is used, select [Internal], or, when the externallight is used, select [External] at Get Alignment Light Location field.

6.�Enter the following parameters.

– Number of Images :

– Gantry Tilt :

– Thickness :

– Helical Pitch :

– Image Interval :

7.�Click on the [Confirm Biopsy Rx] button.

8.�Press [Move to Scan] button when it lights up. Then, press [Start Scan]to start the biopsy scans.

Scan


Dir. 2295148-100Rev. 0

Smart Prep (Option) 1

Function : The Smart Prep feature allows you to monitor contrastenhancement change during injection, to assure the acquisition of axial orhelical scans while optimum levels of contrast are present.

Three phases of Smart Prep

Smart Prep consists of three phases, which are a Baseline, Monitor andScan Phase.

� Baseline phase

This phase requires one unenhanced scan through a particular area ofanatomy that will be the point of interest to monitor.

� Monitor phase

This phase requires the operator to take up to 20 scans at one location whilethe IV (introvenous) contrast is being administered. You will be able to watchthese scans on the CRT as the scans are proceeding.

� Scan phase

This phase performs your scan prescription that will be started by theoperator when the optimum level of contrast enhancement is reached, eitherby visual evaluation or by a preset threshold selection.

Parameters of Smart Prep

Some of the parameters used during the Smart Prep prescription are presetand unchangeable. They are 256 matrix, Soft Tissue algorithm and 0.6–secscan time.

Note : Because monitoring scans will not be used for diagnostic purposes,these techniques are used to make sure that the patient receive the minimaldose.

Autovoice

During the Smart Prep the Autovoice function will only be available after thescan phase is initiated. So, the operator may have to give oral breathinginstructions through the intercom during Baseline and Monitor phase and atthe beginning of Scan phase.

Scout and scan prescription

When you perform Smart Prep, the Prep Delay can be excluded fromparameters. Even if you use it, Smart Prep will override it by putting “SP” inplace of the number.

Scan


Smart Prep 3

Smart Prep prescription

1.�Smart Prep can be accessed through the [Smart Prep] icon on theAxial/Helical Prescription screen.

Repeat One

Thick(mm)


TiltSFOV kV mA

CTDIw


Series More

Preview

Optimize

PriorityRecon

Rx

BiopsyRx

��

(mGy)

SmartPrep

SmartPrep

2.�When the Smart Prep is not incorporated in the protocol, toggle the [Off]button to [On] on the Smart Prep screen.

To [On]Smart Prep screen

Smart Prep

Off

MonitorLocation mA

MonitoringDelay

MonitoringISD

EnhancementThreshold

Scan PhaseDelay

ShowLocalizer

Accept Cancel

Each parameter is described on the following page.

Scan


Dir. 2295148-100Rev. 0

Smart Prep 4

3.�Enter the following parameters for the Smart Prep prescription.

– Monitor Location : Location of monitoring scan

– mA : Tube current for Base Line and all Monitoring scans(40–100mA�by 5 mA�

– Monitoring Delay : The delay before the Monitoring scan begins(0–90 seconds, by 0.1 sec.�This delay works in conjunction with theadministration of IV contrast.

– Monitoring ISD : The delay between each monitoring scan(3–90 seconds�by 0.1 sec.)

– Enhancement Threshold : The difference in CT value between theBaseline ROI and the one at which you wish to start the Scan Phase.( For example: If you want to start the scan phase when the CT valueof the area of interst reaches 70, then assuming the Baseline ROI is30, the Enhancement Threshold will be 40.)

– Scan Phase Delay : The delay between the time you press [StartScan] button and the time the actual scan begins (3–90 seconds, by0.1 sec.)

Note : The slice selection at Scan Phase may affect Scan Phasedelay. The selection of 7/10mm with Helical or 7/10mm x 2i will affectthe delay. This is because the selection of only up to 5mm x 2 is usedat Monitoring Scan.

– Show Localizer : Select this to display the Scout image with a line onit. With this line, you will be setting the location of the Baseline andsubsequent Monitoring scans.

Note : If there is the difference between Monitoring location and Scan Phasestart location, the Scan Phase will be delayed due to the cradle travel. Forexample, it takes some four seconds for the cradle to travel 300mm.

Scan


Smart Prep 5

4.�After completing all the entries, select [Accept]. The system will return tothe View/Edit screen.

5.�Click on [Confirm] and press [Start Scan] when lit to initiate the Baselinescan.

Scan Progress screen shows the Baseline group, Monitor group and scanprescription.

Scan Progress


BiopsyRx

EndExam

Monitor Scan PriorityRecon

RepeatLast

Group

NextSeries

Exam:285 Series:2

Pause

Phase Phase

0 10 30 4020Images Type kV mA Time Thk Tilt Start End

001–001 120 040 0.6 10 S0.0 S0.0S0.0

S0.0Axial

002–021 120 040 12.0 10 S0.0S0.0Axial S0.0

001–002 120 080 5.0 10 S0.0S0.0 Axial I10.0

50 60

S0.0

S0.0

Seconds

Note : When you select [Accept] on the Smart Prep prescription screen, thefollowing Timing menu shows “SP” in the Prep Group (delay) field, meaningthe Smart Prep Monitoring delay has been set.

PrepGroup

ISD(sec)

BreathHold(sec)

BreatheTime

AutoVoiceNo.


(sec)

SP

SP

Scan


Dir. 2295148-100Rev. 0

Smart Prep 6

6.�After the Baseline scan, its image will be displayed. Also, six displayfunctions for Smart Prep will be presented.

Smart Prep Display

ZoomDisplayNormal

Ellipse

Hide Erase Explicit

Baseline image

ROI

MagGraphics

Refer to the Chapter 3 [Display] for the each display function.

7.�You can calculate up to three ROIs by selecting [Ellipse ROI].

8.�After calculating ROIs, click on [Monitor Phase] and injectsimultaneously the IV contrast.

9.�After you press the [Start Scan] button, the system will automaticallyproceed to the Monitoring scans through the Monitoring delay.

� The Display desktop screen will now look similar to the following one.

Baseline image

Graph

Time

Most recently

reconstructed image

� In the lower right quadrant the Baseline image with ROIs is displayed.

� The lower left quadrant will be displaying in real time the time when eachmonitoring scan is acquired, based on the onset of the monitoring delay.It also displays each of the ROI values of that scan.

� The upper right quadrant will be displaying in real time the most recentlyreconstructed image.

� The upper left quadrant will be displaying in real time the enhancementthreshold graph, comparing the ROI of each monitoring scan with the timefrom the start of the monitoring delay. If you did not take any ROI on theBaseline image, this quadrant will be blank.

Scan


Smart Prep 7

� The Scan desktop screen will now look similar to the following one.

Graph Most recently�� !��)��

��8��6

10.�As the monitoring scans are being acquired, you can watch the linesclimbing toward the enhancement threshold on the graph in the upperleft quadrant.

+� 0� .�

�0�

TT: Threshold

Upper left quadrant

11.�When the line depicting the ROI gets close to or at the thresholdenhancement, select [Scan Phase] on the Scan Progress screen toinitiate the Scan Phase.

Note : If the scan location of Monitoring Phase does not match the startlocation of Scan Phase, the scan start will be delayed by the time the cradletakes to move. For example, it takes some four seconds for the cradle tomove 300 mm. It is highly recommended that the scan location of MonitoringPhase match the start location of Scan Phase.

Note : When the system initiates the Scan Phase, the real time calculation ofthe Smart Prep quadrant will be stopped. A screen save will be used forlater inspection.

Scan


Dir. 2295148-100Rev. 0

Smart Addition (Option) 1

Function

The Smart Addition feature allows you to prospectively add two or moreAxial/Helical images into one image. This is beneficial for brain studies sincethe added images will generate much less artifact particularly aroundposterior fossa area.

Conditions/Restrictions

The following conditions/restrictions must be met to use the Smart Additionoption.

� Scan Type : Axial or Helical (360–degree data)

� Segment and Helical Plus incompatible with this option

� Available Helical pitch : 1.0 – 3.0

� This option can be applied to group by group.

� Only contiguous images (Interval = Thickness) to be added

� Possible thickness of added image : 2, 3, 4, 5, 6, 7, 10 mm

� Possible number of images to be added : 2, 3, 4, 5, 6, 7, 10

� When Smart Addition is prescribed for [Recon 1], both [Recon 2] and[Recon 3] will be automatically designated for Smart Addition. Also, when Smart Addition is not prescribed for [Recon 1], Smart Additioncan not be prescribed for [Recon 2] nor [Recon3].

Procedure

1.�Click on the [ Thick (mm)] key in the Scan Tab menu. The Image Thickness selection menu opens (See next page).

Thick(mm)


TiltSFOV kV mA

CTDIw


(mGy)

Thick

Scan


Smart Addition 2

Smart Addition

Cancel1 2 3 5 7 10

Select the desired Thickness (mm)

Fig.1 Image Thickness selection menu

Note : The Smart Addition key is not available unless your CT systemhas Smart Addition option installed. Also, even if your CT system hasthe Smart Addition option installed, the Smart Addition key remains dim(inactive) unless the right Scan Type is selected.

2.�In order to activate the Smart Addition option, click on the [SmartAddition] key. Then, the Fig.2 Smart Addition Image Thicknessselection menu opens.

Smart Addition

2 3 5 6 7

Image Thickness (mm)

4 10

1 2 53

Beam Thickness (mm) Multiplication Factor

�5

OK Cancel

Fig.2 Smart Addition Image Thickness selection menu

Select the desired Thickness (mm)

On this menu select Beam Thickness (original image thickness) andImage Thickness (thickness of added images), then the MultiplicationFactor (number of images to be added) is automatically determined.

Since the Multiplication Factor is an integer, there are restrictions on thecombination of Beam Thickness and Image Thickness. For example,when 2mm is selected as Beam Thickness, Image Thickness of 3, 5,and 7 are unavailable.

The example of Fig.2 shows 1mm and 5mm are selected as BeamThickness and Image Thickness, respectively. So, the MultiplicationFactor is automatically set to 5.

Scan


Dir. 2295148-100Rev. 0

Smart Addition 3

3.�Click on [OK] to accept the selection. Then, the Fig.2 menu disappearsand the selected thickness is posted in the [ Thickness] field on theView/Edit screen like the example below.

51x5

Example

The example shows that Beam Thickness is 1mm, Multiplication Factor5 and Image Thickness 5mm.

Click on [Smart Addition] if you need to return to Fig.1 menu.

Click on [Cancel] to remove the Fig.2 menu and return to the View/Editscreen.

4.�Prescribe all the other parameters as well.

[Interval] in Smart Addition means the interval between “added” images.The possible maximum value is the image thickness of added imageand the possible minimum value is Beam Thickness.

In the example below, 1mm silces are added by three images. When the possible maximum value of 3mm is set at [Interval], addedimages are combined like image numbers of [1, 2, 3], [4, 5, 6], [7, 8, 9]and [10, 11, 12]. In case of the possible minimum value of 1mm, addedimages are combined like [1, 2, 3], [2, 3, 4], [3, 4, 5] and [4, 5, 6].

Beam Thickness : 1mm

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Interval : 3mm

Smart Addition Example : 1mm x 3

Image number

5.�Proceed to the scan after entering all the necessary parameters.

Added images have the image annotations of ADDx (x: MultiplicationFactor) next to the slice thickness annotation.

Scan


Smart Addition Retro Recon (Option) 1

Function

With Smart Addition option images can be retrospectively added from theraw data obtained from the usual scans.

Conditions/Restrictions

� Data obtained with 7mm or 10mm slice thickness can not be used.

� Recon Mode : Full

� Contiguous image data ( no overlap, no gap)

� Available Helical pitch : 1.0 – 3.0

� Two or more images data

When the above conditions/restrictions are not completely observed, thekeys under [ Thick (mm)] field in the Image tab are dimly displayed indicatingSmart Addition retro recon is unavailable.

RetroScanType

Y

Y

ScanStart

Location

ScanEnd

LocationRetroStart

RetroEnd

No. ofImages

ImageInterval

GantryTilt

SFOV

QuitList

Exams Confirm

Images Recon

Thick(mm)

Thick key

Scan


Dir. 2295148-100Rev. 0

Smart Addition Retro Recon 2

1.�After confirming the [Thick] key is boldly displayed (active), click on the[Thick] key to open the following Fig.1 Image Thickness selection menu.

Select the desired Image Thickness

Cancel1 2 103 4 5 6 7

Fig.1 Image Thickness selection menu

Since the number of images to be added is an integer, the slicethickness of the added image depends on the beam thickness(thickness of original image). The chart below shows beam thicknessand valid/invalid added image thickness.

1 mm 1, 2, 3, 4, 5, 6, 7, 10 mm

2 mm 2, 4, 6, 10 mm 1, 3, 5, 7 mm

3 mm 3, 6 mm 1, 2, 3, 5, 7, 10 mm

5 mm 5, 10 mm 1, 2, 3, 4, 6, 7 mm

Beam Thickness Valid Thickness Invalid Thickness

On the real menu of Fig.1 the valid thickness numbers are displayedboldly whereas the invalid thickness numbers are displayed dimlydepending on the beam thickness.

2.�Select the desired image thickness from the Fig.1 menu or click on[Cancel].

3.�After entering all necessary parameters click on [Confirm] to startretrospective reconstruction of added images.

Added images have the image annotations of ADDx (x: MultiplicationFactor) next to the slice thickness annotation.

Scan


Cardiac Gating (Option) 1

Introduction

A primary cause of heart problems is the buildup of plaque inside thecoronary arteries. At present there is no established noninvasive means ofdetecting and measuring these deposits. Recent research has focused onthe calcium which accumulates in some of these plaque deposits. Although calcium may not be present in all plaque deposits, a significantcorrelation between volume and clinical risk seems to exist.

Unlike the plaque itself the calcification can be seen in X–ray images. With a CT scan of the entire heart, volume/density calcifications on the areasof calcification may be used to quantitatively assess the patient’s level ofcoronary risk.

A difficult aspect of calcification scoring from CT images is the motion of theheart. The images need to be acquired during a portion of the heart cyclewhen the heart is as still as possible to minimize blurring and othermotion–induced artifacts.

Theory

Cardiac Gating images are retrospectively created from the scan raw dataobtained during the R to R interval. The R to R interval is the time betweenmaximum patient heart contractions (R–wave peaks). Each R to R intervalrepresents the length of one cardiac cycle.

R–R IntervalR R

QS

QS

R–wave is used for triggering because of its strong electrical signal andcorrelation of the muscle activity of the heart.

Scan


Dir. 2295148-100Rev. 0

Cardiac Gating 2

Basic Steps

Cardiac Gating scans and subsequent CACS (Coronary Artery CalcificationScoring) analysis are implemented through the following steps.

1.�Heart Rate Display Setup

2.�ECG Setup

3.�Patient Preparation

4.�Scan Prescription and Initiation

5.�Retrospective Reconstruction for Cardiac Gating

6.�Data transfer to Advantage Workstation (AW)

7.�CACS analysis on AW (Refer to the [SmartScore] manual.)

Heart Rate Display Setup

bpm

Heart Rate Display

GE Medical Systems

Front

Dimmer

Cord

CAUTION

Do not use this display asa patient monitor to preventmisdiagnosis.

Rear

Heart Rate Display can be placed on or near the OC. This device calculatesand displays the patient’s heart rate by R–pulse from the ECG, thus thedisplayed heart rate is not the same as the ECG shows, though it is stillaccurate enough to determine a suitable scan pitch.

The heart rate is displayed in 2 or 3–digit number ranging from 15 bpm to200 bpm. When the actual heart rate is less than 15 or more than 200, itshows “0 bpm” or “blinking 200 bpm”, respectively.

After turning on the switch, there is no user operation.

Scan


Cardiac Gating 3ECG Setup

Before initiating scans for Cardiac Gating, make sure an ECG monitor setupis complete for the system to receive trigger signals synchronized with Rpulses.

The diagram below shows the connection box and cable that connect the CTsystem and the ECG. (Refer to the ECG manual for its use.)

Connection Box

Cable BoxTo ECG

Cable

Bottom of Gantry right side (from front)

Note : If the system detects no signal from the ECG monitor for threeseconds during the scan, the system will automatically abort the scan andpost a message to inform you that you should check the connection betweenthe system and the ECG monitor.

Patient Preparation

Refer to the SmartScore manual on how to place ECG leads on the patient.Note : The patient must have the ability to hold his/her breath for 30 to 40seconds (typically), although it may be necessary to hold longer than 40seconds.

Scan


Dir. 2295148-100Rev. 0

Cardiac Gating 4

Scan Prescription and Initiation

1.�Scout scan should be done as a prerequisite for Cardiac Gating.Obtain AP and lateral scout to localize the heart.

2.�In order to activate Cardiac Gating function, first select [Create NewSeries] button at the bottom of View/Edit screen.

Name : ID :

Anatomical

Prior Next

Series Description

New Next Create

Split

Repeat��

End

��

One

Reference

Protocol :


ShowLocalizer

AutoStore

AddGroup Current

Group

DeleteSelectedGroup

Images ScanType

StartLoc.

EndLoc.

No. ofImages

Thick(mm)


Tilt SFOV kV mA CTDIw


Select

Series Series More

Preview

Optimize

Exam Protocol

PriorityRecon

Rx

��

Exam: Series:

ReconArea

(mGy)

SmartRecon

AutomA OFF

OFF

View/Edit Screen

[Create New Series]

Scan


Cardiac Gating 5

3.�The following menu opens to provide access to [Cardiac Gating]. (Note : [Cardiac Gating] button will not be available unless your CTsystem has Cardiac Gating option installed.)

Scout Axial


ATTENTION : This will remove all unscanned groups.

OK Cancel

CardiacGating

Optional

Click on [Cardiac Gating] button, then [OK] to proceed. Or, click on [Cancel] to exit.

4.�Upon selection of [Cardiac Gating], [Scan Type] at the View/Edit screenwill automatically post [Cardiac Full 1.5sec], which indicates [Helical Full1.5sec]. Then, the scan time should be changed from 1.5sec to thefastest scan time available on the system such as 0.7sec or 0.8secdepending on your system. (Note: The system does not automatically choose the fastest scan timeas default.)

Images ScanType

StartLoc.

EndLoc.

No. ofImages

Thick(mm)


TiltSFOV kV mA


CTDIw(mGy)

CardiacFull

0.8sec

CardiacFull

0.8 sec

ScanType

Scan


Dir. 2295148-100Rev. 0

Cardiac Gating 6

5.�Prescribe the other scan parameters as well.

Be sure to scan from base of heart to apex in one breath–hold.Scanning from superior to inferior acquires images of the base of theheart earlier in the breath–hold, increasing the likelihood of minimizingmotion effects.

The use of the following parameters is highly recommended togenerate enough images to produce one image per cardiac cycleacross the entire heart volume.

� 0.7 ( or 0.8) seconds scan time, single–breath Helical full scan

� 120 kV, 200 mA

� 3 mm slice thickness

� Large SFOV

� 25 cm DFOV

� 0.7 :1 pitch for heart rate of 60 BMP(beats per min.) Increase pitch as heart rate increases. Refer to the table/formula onthe appendix page of this manual to calculate or select pitch.

� The default kernel should be STND. An error has been made in theprotocol which selects the STND+ kernel. Be sure to change thekernel in the protocol to STND before performing Calcium Scoringexams.

Note : The image S/N ratio tends to deteriorate for big patients. This may make the scoring less accurate.

6.�Initiate the scanning.

Note : When the system does not receive signals from the ECG for 3seconds or longer, the system will automatically abort the scan anddisplay the message of “SCAN ABORTED BY NO GATING SIGNAL” atthe status area. Check the connection between the system and theECG monitor, then try to scan again.

Note : Cardiac Gating scans prospectively generate ordinary Helicalimages. However, special retrospective reconstructions must be doneto create images for CACS (Coronary Artery Calcification Scoring)purpose. Refer to the following pages for those retrospectivereconstruction procedures.

Scan


Cardiac Gating 7

Retrospective Reconstruction for Cardiac Gating

You can prospectively obtain ordinary Helical images through Cardiac Gatingscans. However, special retrospective reconstructions must be done tocreate images for CACS (Coronary Artery Calcification Scoring) purpose.

1.�After performing Cardiac scans, proceed to Retro Recon session toobtain the necessary images.

Retro Recon

2.�At the Retro Recon parameter screen, you will see three newparameters for Cardiac Gating. They are [ Trigger Delay (%)], [ImagesPer R to R] and [ Time Between Images].

Retro ScanType

Y

ScanStart

Location

ScanEnd

LocationRetroStart

RetroEnd

No. ofImages

GantryTilt

SFOV

Images Recon

TriggerDelay

ImagesPer

R to R

TimeBetweenImages

ImagesPer

R to R

TimeBetweenImages

TriggerDelay

(%)

(%)

Scan


Dir. 2295148-100Rev. 0

Cardiac Gating 8

3.�Each of [ Trigger Delay(%)], [ Images Per R to R] and [ Time BetweenImages] has its own default figure, but you can also have choices. To select or enter other figures than default figures, click on the eachcolumn head.

� [ Trigger Delay(%)]

The [ Trigger Delay(%)] defines, in a percentage, where in the cycle themiddle image is acquired (which should be in the diastolic phase tominimize the cardiac motion.) The default is 70%. For example, if youhave requested 3 images, if the [R to R Interval] is 900 ms, and if youuse the default trigger delay of 70 %, the image 2 will be acquired at630 ms. The valid range for trigger delay is 0 to 99%. To specify thedelay, click the box and type in the percentage value (without “%”mark).

Enter the desired Trigger Delay(%).

Cancel

� [Images Per R to R]

[Images per R to R] specifies the number of images created with eachheartbeat. The default is 3, but choices are 1, 3, or 5 images. To makea selection, click the button. A box will open. In the box, click the buttonfor 1, 3, or 5. Click [Cancel] to close the box without making a selection.

Select the desired Images per R to R Interval.

Cancel1 3 5

Scan


Cardiac Gating 9

[ Time Between Images (ms)] spaces the images in the [R to RInterval]. The default is 50 ms, but options are 50 and 100 ms. To continue the previous example, if you have specified 3 images with atrigger delay of 70% for the [R to R Interval] of 900 ms, and if youspecify 100 ms as the [ Time Between Images], the images will bereconstructed at 530 ms, 630 ms, and 730 ms.

Select the desired Time Between Images (ms).

50 100 Cancel

To make your selection, click the button. A box will open. In the box,click the button for 50 or 100. Click [Cancel] to close the box withoutmaking selections.

4.�After retrospectively reconstructing images, you need to transfer thoseimages to Advantage Workstation for CACS (Coronary ArteryCalcification Scoring) analysis. Refer to the SmartScore manual for theCACS analysis.

Scan


Dir. 2295148-100Rev. 0

Cardiac Gating 10

Appendix : Pitch Selections for Cardiac Gating

Without Overlap

Pitch = ST × bpm ÷ 60 = bpm ÷ 75

( ST : rotational scan time, bpm : beats per minute)

Table : Pitch Selection for various Heart Rate (with 2 mm slice thickness & scan time of 0.7 or 0.8 sec)

HeartRate

R–to–R Interval

Pitch

(bpm) (ms)

50

55

60

65

70

75

80

85

90

1200

1090

1000

923

857

800

750

705

666

0.6

0.6

0.7

0.8

0.8

0.9

0.9

1.0

1.0

(with 0.7sec)

0.6

0.7

0.8

0.8

0.9

1.0

1.0

1.1

1.2

(with 0.8sec)Pitch

Chapter 5


FILMING

AutoFilm 1Function : AutoFilm provides a wide variety of options so you can tailor thefilming to a specific need for your scan protocol or edit the existing filmingparameters as needed.

There are two pieces to the AutoFilm setup. One is setting the parametersfor the film, which can be accessed through [AutoFilm Setup] button on theView/Edit screen. The other piece is setting the parameters for the image,which can be accessed through the [Film] tab card.

Name : ID :

Anatomical

Series Description

Reference

Protocol:


ShowLocalizer

AutoStore

AutoFilm Setup

View/Edit screen

Exam: Series:

ReconArea


AutoFilm

FrameFormat


Level1

MagFactor

Rotate UserAnno.

GSE

Recon 1Film Set

1

Recon 1Film Set

2

Recon 2Film Set

1

Recon 2Film Set

2

Recon 3Film Set

1

Recon 3Film Set

2

Film tab card

Filming


Dir. 2295148-100Rev. 0

AutoFilm 2

1. �To open the Autofilm Setup page, select the [AutoFilm Setup] icon atthe top of the scan monitor while in the Axial/Helical series. Theseparameters will be set up per series or temporarily edited while in theprotocol.

Laser Camera

OK

Autofilm Setup

Destination

Format Size

Normal Slide

Copies

�

Film Direction

Top to Bottom

Auto Start Auto Print

Yes Yes

Exam Page Series Page

Yes Yes

Scout XRef–Scout

Auto Film Composer

e/s/i

Show Grayscale

Yes

Cancel

Note: Once a scan has been acquired, you can not go back to the AutofilmSetup page, unless you select a new series or a new protocol.

Description of each function is as follows;

� Format

There are 12 options for film format. Click on one of them.

� Film Direction

You can have the images filmed Top–to–Bottom or Bottom–to–Top. Click onthe blue highlighted arrow to toggle.

Filming


AutoFilm 3

� Destination

This determines what type of printer the images will be filmed on. Click on��buttons to select the destination (printer). The current destination isdisplayed in the message area.

� Size

You can choose to film either in the normal setting or slide setting.

� Copies

You can choose how many copies you want the camera to print. Select thenumber you want by either clicking in the box and typing in the number orclicking on ��arrows to increase or decrease the number. The validrange is from 1 to 99.

� Exam Page/Series Page

This allows you to film the Exam Page and/or Series Page. Toggle betweenYes and No. These pages will be filmed at the end of the film and will not beadded to the film until a new series or [End Exam] is selected.

� Scout

This allows you to autofilm a Scout image. Select Scout icon to open thefollowing menu.

Film Scout

Scout Series Number

Scout Number

Magnification Factor

Yes No

Window Width

Window Level

Accept

In order to autofilm a Scout image, select [Yes] first, then enter otherparameters. Lastly select [Accept].

Note: The valid range for Magnification Factor is from 0.5 to 8.0. If a Scoutimage exceeds 500mm in length, the magnification factor must be less than1.0 to view the entire Scout image.

Filming


Dir. 2295148-100Rev. 0

AutoFilm 4

� XRef–Scout

This allows you to film a Scout image with cross–reference lines that showaxial scan locations. Select [XRef–Scout] icon to open the following menu.

Film Scout With Reference

Scout Series Number

Scout Number

Magnification Factor

Yes No

Window Width

Window Level

Accept

Image Range All First/Last

At Image Range selection, select [All] for axial images and [First/Last] for thefirst and last axial image.

Note: The valid range for Magnification Factor is from 0.5 to 8.0. If a Scoutimage exceeds 500mm in length, the magnification factor must be less than1.0 to view the entire Scout image.

After entering all parameters, select [Accept].

� Show Gray Scale

This allows you to choose whether to have the gray scale displayed on thefilm. Simply toggle between Yes and No.

Note: This selection is not available if your laser camera interface is digital.

� Auto Film Composer

This selection will determine which will be captured on the AutoFilmcomposer, an image itself or numbers of exam/series/image. Select either[Image] icon or [e/s/i] icon.

Filming


AutoFilm 5

� Auto Start

If you select [Auto Start] icon to Yes, the following menu will appear. You canselect whether to have your film sets automatically start filming.

AutoFilm Setup

Film Set 1

Auto Start Film Sets

NoAuto start

Auto startNew Sheet

Auto startSame Sheet

Film Set 2

Film Set 3

NoAuto start

Auto startNew Sheet


NoAuto start

Auto startNew Sheet


Accept Cancel

If you select [No Auto start] on the above menu, the system will notautomatically start filming. In this case the operator is to decide when to startfilming.

If Autofilm is on and the Autofilm viewport is showing, once you startscanning, you can choose from one of the three options at the bottom of theAutofilm window. The following three icons are those options.

Start New Sheet

StartNew Sheet

[Start New Sheet] will start a new sheet of film with the format that has beenselected from the Autofilm Setup page.

Continue Same Sheet

ContinueSame Sheet

[Continue Same Sheet] will continue filming on the current sheet in theAutofilm composer with the same format as the Autofilm composer.

Cancel Film Series

CancelFilm Series

[Cancel Film Series] will stop Autofilm for that series.

Filming


Dir. 2295148-100Rev. 0

AutoFilm 6

If you select [No Autostart] with autofilm on but the autofilm viewport is notshown, the following message will appear.

Cancel

Exam: 4Series: 1

is ready for auto filming

Show FilmViewport

If you select [Show Film Viewport], the autofilm viewport will be displayed,then you can select [Start New Sheet], [Continue Same Sheet] or [CancelFilm Series].

Autofilm viewport

StartNew Sheet

ContinueSame Sheet

CancelFilm Series

If you select [Autostart New Sheet], the Autofilm process automatically uses[Start New Sheet] function.

If you select [Autostart Same Sheet], the Autofilm process automaticallyuses [Continue Same Sheet] function.

After making all the necessary selections, select [Accept] to continue orselect [Cancel] to cancel. In both cases, the system returns to the AutofilmSetup page.

� Auto Print

[Auto Print] is a toggle button between Yes and No. If you select Yes, thenthe last film of the exam will be automatically printed, whether the Autofilmcomposer is filled or not. If you select No, then you will need to select Printon the Autofilm composer.

2. �On the Autofilm Setup page, select [OK] to accept all entries. Or, select[Cancel] to cancel.

Filming


AutoFilm 7

The Autofilm parameters for the images can be prescribed or modified byselecting the Film Tab Card on the View/Edit screen.

1. �Click on the Film Tab Card to open the following menu for Autofilmingparameters entry. You may skip this step if you do not intend to performAutofilming.


AutoFilm

FrameFormat


Level1

MagFactor

Rotate UserAnno.

GSE

Recon 1Film Set

1

Recon 1Film Set

2

Recon 2Film Set

1

Recon 2Film Set

2

Recon 3Film Set

1

Recon 3Film Set

2

Film Tab Card

2. �Click on each button and select or type in a parameter.

� Auto Film

Select On or Off on the following menu after clicking on [Auto Film].

Auto Film

On Off Cancel

� Frame Format

Select one of the four formats in the following menu by clicking on it.

MID Format

Cancel

� Interval

Select one of the five choices as to which image to film.1= every image, 2=every other image, 3= every third image, and so on.

Filming


Dir. 2295148-100Rev. 0

AutoFilm 8

� Flip

Select one of the following options. [FTB] (Flip Top to Bottom), [FTB/FLR](Flip Top to Bottom/Flip Left to Right), [FLR] (Flip Left to Right), [None]

Flip

FTB FTB/FLR FLR None Cancel

� Width 1

The first choice for window width (1� 4096)

� Level 1

The first choice for window level (–1024� 3072)

� Mag Factor

Valid image magnification factor range is from 0.5 to 4.0

� Rotate

Right 90 degrees, left 90 degrees, or 180 degrees

Rotation

None Cancel

� User Anno(tation)

Maximum four lines

User Annotation

Accept Cancel

Filming


AutoFilm 9

� GSE (Gray Scale Enhancement)

Select one of the four choices.

Gray Scale

G1 G2 G3 Off

Cancel

G1 : lowest contrast G2 : medium contrast G3 : highest contrastOff : no effect

The name of the grayscale will be annotated just above the tick mark.

Filming


Dir. 2295148-100Rev. 0

AutoFilm Composer

Click on the [AutoFilm Composer] icon in the Display mode to display thefollowing Autofilm Composer. You do not necessarily have to display thiscomposer during autofilming.

You can move the Autofilm Composer on the screen by holding the cursoranywhere in the title bar area, then dragging the composer to the desiredlocation.

Auto Film

Clear

Print

Pause Filming

Film format reflects the one prescribed on the AutoFilm Setup page.

Each port can contain either an image or a set of exam, series and imagenumber depending on the prescription on the AutoFilm Setup page.

Click on the [AutoFilm Composer] icon again to remove the composer.

Filming


Manual Film

Function : Manual Film allows you to manually film images.

The Manual Film Composer can be initiated from several locations includingthe Exam Rx Desktop, Image Works browser, Image Works viewer andImage Works miniviewer.

[Manual FilmComposer]

Exam Rx Display menu

[Review Layouts][Autoview

Layouts]

When you perform Manual Filming, you have to use one or two viewports inthe Review Layouts, or one or two viewports in the bottom of the AutoviewLayouts.

Filming


Dir. 2295148-100Rev. 0

Manual Film Composer 1

Upon the selection of [Manual Film Composer], the following Manual FilmComposer will appear.

You can move the Manual Film Composer on the screen by holding thecursor anywhere in the title bar area, then dragging the composer to thedesired location.

Laser CameraFormats

Film Composer

Options

Clear

Print

Current status is :

close button

� Film Composer close button

In order to close the Film Composer, click on the small button at the upperright corner of the composer, or click on the [Manual Film Composer] iconagain.

� Laser Camera

The destination of printing will be changed. If you wish to have a destinationother than a laser camera, place the cursor over the word “Laser Camera”,press and hold down the left mouse button to open a pull–down menu, thenselect a desired destination.

� Formats

Click on any one of the twelve formats. It will be reflected on the composer.

Filming



If you select the [Option] icon, the following Print optionsmenu appears.

��

��

��

��

��

��

��

��

�

��

��

��

��

��

��

�� !�"�

#�� $��

Select On from the Slide format pull–down menu to employ aslide format.

Note : If the selected printing machine does not support slideformat, the Slide format button is shown in gray, indicating itis not usable.

Select On from the Grayscale pull–down menu to print agrayscale onto a film.

Note : If the selected printing machine does not supportgrayscale, the Grayscale button is shown in gray, indicating itis not usable.

Select On from the Auto Printing pull–down menu toautomatically start printing immediately after all the frames arefilled.

��

Slide format:

Off

On

Grayscale:

Off

On

Auto printing:

OffOn

Filming


Dir. 2295148-100Rev. 0


Select On from the Auto clear page pull–down menu toautomatically clear all the frames after the completion ofprinting.

Select either [E/S/I] or [Image] from the Icon labels pull–downmenu to put either Exam/Series/Image number or Image itself,resepctively, into the frame.

Click on the [�] or [�] button to increase or decreaserespectively the number of copies. Or, type in the desirednumber into the numerical entry field.

When filming function keys are being used, this selection willdetermine the order with which the images will be printed intothe frames of the composer.

Select [Done] to accept the entries and close the Printoptions window.

Auto clear page:

Off

On

Icon labels:

��

Number of copies:

� � �

Expose order:

Left/RightTop/BottomRight/LeftBottom/Top

��

Filming



If the Auto clear function is off under the Print options menu,select [Clear] on the Film Composer to clear the page ofimages to start over or start a new sheet.

The message “Clear the current page” will appear. Select [OK] to clear orclick on [Cancel] to cancel.

Note : If the Auto clear page is on, the Film Composer will automaticallydisappear after printing.

If the Auto printing function is off under the Print optionsmenu, select [Print] on the Film Composer to print the currentpage of images.

The status line at the bottom of the composer will start the message“Printing...” and the images will be sent to the printing queue. Once thequeue is filled with images, the printing will start.

As the Film Composer communicates with the camera, thestatus is posted at the bottom of the composer, for example,“print queue empty”, “printing”, “film supply low”, or “outputdevice not connected”.

Note : Messages posted in green mean everything is OK. Messages inyellow are warnings. Messages in red mean a problem exists.

Note : When there exists an arrow button in the message area, you can getthe details by clicking on it.

%��

&��

Filming


Dir. 2295148-100Rev. 0


Image removal from Film Composer

1. �If you wish to remove an image on the Film Composer window, click onthat image.

2. �There appears a message “Do you really want to delete this image'”

3. �Select [Yes] to delete, or select [No] not to delete.

Load images by drag and drop

1. �In order to load an image onto the Film Composer, click and hold thecursor on the image, then drag it to an image frame, then release thecursor to deposit the image.

2. �Repeat the above steps as needed.

Load images by F1 function key

Another way to load images onto the Film Composer is as follows.

1. �Move the cursor onto the desired image and press the F1 key.

2. �The image will be automatically placed into the next available frame

Note : This method may be faster than the drag & drop method, however,you can not jump the frame.

Filming



Page filming by F2 function key

You can use this function to load one sheet of images onto the FilmComposer.

Note : The Film Composer must be empty beforehand. If it is not empty, usethe [Clear] button to empty the Film Composer.

1. �Move the cursor over any one of the displayed images and press the F2key.

2. �The displayed images will be loaded onto the Film Composer in order ofthe displayed images.

Note : In order to perform page filming, the formats must be the samebetween the displayed images and the Film Composer. If the formats aredifferent, the format of the Film Composer automatically turns to that of thedisplayed images as you press the F2 key.

Note : When you are using the Viewer or Mini Viewer, you can also use the[Film Page <F2>] button to perform page filming.

MID (Multiple Image Display) filming by F3 function key

You can use this function to load the multiple image display onto one filmframe.

Note : When you perform MID filming, the image resolution will decrease alittle bit compared with the page filming.

1. �Move the cursor over any one of the displayed images and press the F3key.

2. �The displayed images will be loaded onto the Film Composer in order ofthe displayed images.

Note : When you are using the Viewer or Mini Viewer, you can also use the[Film MID <F3>] button to perform MID filming.

Filming


Dir. 2295148-100Rev. 0


Series filming by F4 function key

The following menu will appear when you press the F4 key.

Format�Use Film Composer

� Viewer Format

Image Selection

1 ← → 181 18

Interval� Print all Images�

�

1/21/3

Current Print Job

No Current Job

Cancel All

Print Last Sheet No

Print Series Cancel

� Format

– Use Film Composer : Select this to use the same format as the currentFilm Composer.

– Viewer Format : Select this to change the Film Composer format tothat of Viewer Format.

� Image Selection

This determines the number of images in the series for filming.

Use the slide bar to set the number.

� Interval

Print all Images : all images

1/2 : every other image

1/3 : every three images

� Current Print Job

This area displays the list of jobs in the current queue.

You can cancel all the jobs with [Cancel All].

Filming



� Print Last Sheet

This selection determines whether the last sheet will be printed before it isfilled with images.

After completing all entries, select [Print Series] to start series filming.

Note : If you wish to cancel the filming after clicking on [Print Series], pressF4 and click on [Cancel All].

Filming


Dir. 2295148-100Rev. 0

Blank page

Chapter 6


QUALITY ASSURANCE

Overview

In order to assure consistent image quality over the lifetime of thediagnostic radiology equipment, users must establish and actively maintaina regular Quality Assurance (QA) program. These procedures ask you toscan a known material (usually a phantom) under a prescribed set ofconditions, and then compare your results with the predicted or optimumvalues. Because you repeat these tests frequently, if not daily, you noticechanges in image quality values before the problem becomes visible. Ifyou do notice a degradation in image quality or a change in QA values youcan schedule a site visit and let the service person or imaging physicist runmore sophisticated tests. Their early intervention could prevent a majorbreakdown.

User QA begins with baseline performance data obtained by performingthe QA tests as soon as the system meets operating system specifications.Take the first set of baseline performance data right after installation andupdate it any time the system undergoes an upgrade or a major repair thataffects image quality. An x–ray tube change is one example. Compareyour daily QA checks against these baselines. The Quality Assuranceprogram documents any change in image quality over time.

Although you can save baseline images to visually compare with your dailyQA checks, you don’t have to. The numerical data supplied during theactual testing provides the necessary objective data for comparison. Thissection contains a sheet titled QA DATA FORM that you can copy and useto record this numerical data.

Quality Assurance


Dir. 2295148-100Rev. 0

Phantom Description

Use the Quality Assurance and Performance Phantom provided with yourCT scanner to assess system performance and establish an ongoingQuality Assurance program. The phantom’s design provides maximumperformance information with minimum effort. This phantom measures sixaspects of image quality. It contains three sections, each corresponding toa single scan plane. The following illustration contains a list of the sectionsand corresponding tests.

Section 1

High Contrast ResolutionContrast ScaleSlice ThicknessPositioning Light Accuracy

Section 2

Low Contrast Detectability

Section 3

Noise and Uniformity

QA Schedule

The most effective Quality Assurance program involves obtaining basicperformance data once a day, or at least 2–3 times per week. You mustobtain data frequently and on a regular basis in order to detect anychanges in system performance that might occur before it affects clinicalimage quality. At minimum, acquire a single 10mm scan of Sections 1 and3 of the Performance Phantom each day.

Select On from the Grayscale pull–down menu to print agrayscale onto a film.

Note : If the selected printing machine does not supportgrayscale, the Grayscale button is shown in gray, indicating it isnot usable.

Grayscale:

Off

On

Quality Assurance


Phantom Setup

Place the performance phantom on the phantom holder and level it. (Tapea small piece of cardboard or a washer to the phantom, if necessary toaccomplish this.) Position the phantom using the laser alignment lights asfollows:

1. Align the axial light to the circumferential line marking Section 1.

2. Align the coronal light to the horizontal lines on either side of the phantom.

3. Align the sagittal light (where it strikes the top of the phantom) to the verticalline on the face of the phantom.

4. Position the phantom and press the Internal Land button on the gantry.

The performance phantom contains three sections. When you correctlyfollow the positioning instructions listed above, Section 1 corresponds to0.0 mm table position, Section 2 (Low Contrast Detectability) to the 35.0mm location and Section 3 (Noise and Uniformity) corresponds to the 50.0mm location.

Circumferentialreference line Vertical reference line

Horizontal reference line

Horizontal reference line

Quality Assurance


Dir. 2295148-100Rev. 0

Scan the QA Phantom

Follow the normal Single Scan protocol. Scan three locations, one for eachQA phantom section. If you set up the phantom as described on theprevious page, prescribe scan location 0.0 for section 1 of the phantom,35.0 for section 2 and 50.0 for section 3. Use the scan parameterssuggested in Table 1. You can use other parameters, but the performanceresults won’t match the data in this manual.

[NEW PATIENT] kVp – 120 CAL FOV – Small[HEAD FIRST] mA – 100 Recon FOV – 25cm

Time – 3 sec centered[HEAD] Thickness – 10mm*[SINGLE SCAN] Scan Mode – Single Recon Mode – Standard

SOFTKEY PROMPT SCAN VALUE RECONSTRUCTION

TABLE 1

*Check image thickness and positioning light accuracy by acquiring anumber of images and varying the slice thickness between scans.

Test and Analysis of the Phantom Images

Begin the analysis as soon as the Section 1 image display appears. Makecopies of the form on the following page and record the QA results there.Keep previously recorded QA results and compare them to the most recentanalysis for consistency.

Quality Assurance


Contrast Scale

Section 1 of the phantom tests the contrast scale. CT assigns CTnumbers, also called (HU) Houndsfield Units, to the attenuation values ofX–Ray passing through a variety of material densities. The softwaremakes the attenuation visible by assigning shades of gray to groups ofnumbers you select with Window Width/ Level functions during imageDisplay. For test purposes, the CT values of water and acrylic in thephantom represent the standard against which you track your system’scontrast scale over time. The test for contrast scale follows:

1. Display a circle cursor (approximately 1 cm in diameter) from [Ellipse ROI] onthe image as shown in Figure 1. For consistency, use the same size cursorand location each time you perform this test.

2. Position the cursor on the Plexiglass block and click the left mouse button onceto calculate the ROI. Record the mean CT number on the QA Data Form.(Standard deviation record optional.)

3. Position the cursor over the water section and click the left mouse button onceto calculate the ROI. Record the mean CT number for water on the QA Dataform. (Standard deviation record optional.)

4. Subtract water’s CT number from Plexiglass’ CT number and record thedifference on the QA Data form.

FIGURE 1

Position 1cm ROI over water

Position 1 cm ROI over Plexiglas

Quality Assurance


Dir. 2295148-100Rev. 0

High Contrast Spatial Resolution

Section 1 of the phantom contains six sets of bar patterns in a Plexiglassblock that you use to test high contrast spatial resolution. Each patternconsists of sets of equally sized bars and spaces, in the following sizes: 1.6mm, 1.3 mm, 1.0 mm, 0.8 mm, 0.6 mm, and 0.5 mm. Water fills the spacesand provides about 12% (120 HU) contrast. Examine the bar patterns todetermine the limiting resolution, defined here as the smallest bar pattern inwhich you see all five bars.

A more sensitive and quantitative method for assessing changes in systemresolution involves measuring the standard deviation of the pixel values ina single or multiple bar pattern. ROI standard deviation provides a goodindicator of system resolution and a sensitive method to detect changes insystem resolution. The recommended procedure follows:

1. If necessary, click on [Erase] to remove previous ROI data.

2. Display and position a box cursor from [Box ROI] over the largest (1.6 mm) barpattern. The cursor should fit within the bar pattern as shown in Figure 2.Adjust the size and position of the cursor as necessary.

3. Click the left mouse button once to calculate the ROI and record the standarddeviation on the QA data form.

4. (Optional) Repeat this procedure for the 1.3, 1.0, and 0.8 mm bar patterns.

FIGURE 2

Position box cursorover largest barpattern, and size ituntil it fits over thepattern.

Optional: repeatfor 1.3mm pat-tern



Quality Assurance


Slice Thickness

Section 1 of the phantom also tests slice thickness. Both sides of theresolution block contain a pattern of air filled holes designed todemonstrate slice thickness. (See Figure 3.)

Air filledholes

FIGURE 3

The resolution block contains holes drilled 1 mm apart and aligned in thedirection of slice thickness (perpendicular to scan plane). Each visible holein the image represents 1 mm of beam thickness. The software assignsless negative CT numbers to partial hole images or holes located on theedge of the slice profile. To determine slice thickness, display theimage at the recommended window level and width, and count thevisible holes. Black holes in the image represent a full millimeter of slicethickness. Gray holes count as fractions of a millimeter; two equally grayholes count as a single 1 mm slice thickness.

Recommended window width: 300. Recommended window level:–100 for 3.0 mm slices, 0 for 5.0 mm, and +50 for 10.0 mm slices. Yourimage may show less detail than this example.

FIGURE 4

Adjust the window width and level, then count thelines, which represent theair filled holes.

Each black line represents one milli-meter of slice thickness. Gray linesrepresent fractions of a millimeter

Quality Assurance


Dir. 2295148-100Rev. 0

Positioning Light Accuracy (optional)

Refer to Figure 3 on the previous page: notice how the center hole in thehole patterns on both sides of the resolution block appear longer than theothers. The manufacturers drilled the center holes deeper to help youidentify them in the image. The center hole position corresponds preciselyto the black line scribed on the circumference of the phantom. When youuse an accurate Positioning light and align the phantom’s circumferentialline to the axial light, you’ll see a symmetrical hole pattern around thecenter (longer) hole in the slice thickness pattern. See Figure 5. For bestresults, use the 1.0 mm slice thickness.

FIGURE 5

Center hole positioncorresponds to black linearound circumference ofphantom

Align black line onphantom to positioninglight

Quality Assurance



Section 2 of the QA phantom tests low contrast detectability, defined hereas the smallest hole size visible for a given contrast level at a given dose.This phantom section contains a 0.75 mm thick polystyrene membranesuspended in water and pierced by a series of holes in the following sizes:10.0 mm, 7.5 mm, 5.0 mm, 3.0 mm, and 1.5 mm. The difference in CTnumbers between the water, and water plus plastic, equals the contrast inHoundsfield Units (HU). Divide the HU value by ten to obtain the contrastin percent. Measure the contrast between the plastic membrane and thesurrounding water in the following manner:


2. Display and position a box cursor from [Box ROI] over the image. Adjust thecursor to a rectangle, approximately 1/2 cm high by 5 cm long, as shown inFigure 6.

3. First position the cursor over the polystyrene membrane above the holes.Click the left mouse button once to calculate the ROI. Record the mean CTnumber in the Low Contrast resolution box on the QA Data Form.

4. Next place the cursor in the water section above the membrane and click theleft mouse button once to calculate the ROI. Record the mean CT number.

5. Subtract the CT number of the water from the CT number of the membrane andrecord the difference.

6. Click on [Erase] to remove previous ROI data.

7. Repeat steps 3, 4, and 5. This time position the cursor below the membraneholes, then move it over the water area below the membrane.

8. Count and record the number of visible holes to determine contrast.

FIGURE 6

A. Position box cur-sor over polystyrenemembrane aboveholes, and take ROI.

B. Position box cur-sor over water abovemembrane and, takeROI.

C. Position box cur-sor over polystyrenemembrane belowholes, and take ROI.

D. Position box cursorover water below mem-brane, and take ROI.

Subtract B from A

Subtract D from C

Count visible holes

Quality Assurance


Dir. 2295148-100Rev. 0


Section 3 of the phantom tests noise and uniformity. Take a water–onlyscan in Section 3 to provide a uniform image by which to assess image CTnumber noise and uniformity. Enclose a region of interest, click the leftmouse button once to calculate the ROI, and the software calculates anddisplays the standard deviation or noise of the pixels inside. The softwareoften divides the HU noise values by 1000 (representing the contrast scalebetween air and water) and multiplies by 100 to convert HU to apercentage of water attenuation.

The procedure for noise and uniformity testing follows:


2. Place a circle cursor approximately 2 cm in diameter on the center of the imageas shown in Figure 7. Adjust the size of the cursor as necessary.

3. Click the left mouse button once to calculate the ROI. Record the mean CTnumber and standard deviation on the QA Data Form.

4. (Optional) Repeat the above instructions placing the cursor at the 12 o’clockposition and once again at the 3 o’clock position.

Position circle cursor overthe center of the image,and take ROI.

Optional: Take an ROI at the12 o’clock position.

Optional: Take an ROI at the 3 o’clockposition.

FIGURE 7

Quality Assurance


Typical Results and Allowable Variations

Because people determine clinical image quality, it remains subjective anddifficult to define. GE expects the standards of allowable variation in imagequality parameters to vary with the installation and image evaluator(s). GEencourages you to establish and follow a Quality Assurance (QA) programso you can discover any degradation of image quality before it effectsclinical images. Over time, institutions use the QA procedure to establish acorrelation between acceptable clinical image quality and acceptablevariations in the image performance indices included in the program. Thispage contains suggested allowable variations; don’t mistake them forabsolutes. Compare any parameter variation to the maximum deviationspecified in the next section called, Dose and Performance. Make sureyou used the prescribed technique, then inform service when the variationsreach the specified maximum deviation.

Contrast Scale

The difference in CT numbers between the Plexiglass resolution block andwater should equal 118, with a suggested allowable variation of 10%.

High Contrast Spatial Resolution

The standard deviation for an ROI in the 1.6 mm bar pattern should equal36 HU, with a suggested allowable variation of 20%.

Nominal Slice Thickness

Slice thickness should not vary from the expected value by more than 50%for thickness of 2.0mm or less and ± 1.0mm for thickness over 2.0mm,when evaluated according to instructions.


Because this test relies upon the perceptual judgment of the personcounting visible and well–defined holes, we can’t suggest an allowablevariation. Rather, we suggest you choose a single, barely visible hole andclosely monitor that particular hole during subsequent testing fordegradation in this image parameter.


Mean should equal 0± 3Standard deviation should be less than 4.9

Quality Assurance


Dir. 2295148-100Rev. 0

Weighted CTDI100 (CTDIW) for MX165ZJ Tube

Explained below contains information that relates image quality to radiationdose, as required by the IEC standard, in compliance with theIEC60601–2–44, dated (1999–02). Please review this information.

Head 300 mAs (mGy)

80 kV

120 kV

140 kV

1 mm

28

70

94

2 mm

26

65

86

3 mm

28

68

91

5 mm

29

72

97

7 mm 10 mm

29 31

74 76

99 100

Body 195 mAs (mGy)

80 kV

120 kV

140 kV

1 mm

8

20

27

2 mm

7

19

26

3 mm

8

28

5 mm

8

21

30

7 mm 10 mm

9 9

22

30 31

20 23

With SmartBeam Filter

Head 300 mAs (mGy)

80 kV

120 kV

140 kV

1 mm

18

53

76

2 mm

16

47

67

3 mm

15

45

64

5 mm

15

45

64

7 mm 10 mm

15 15

45 46

64 65

Body 195 mAs (mGy)

80 kV

120 kV

140 kV

1 mm

4

16

24

2 mm

4

14

21

3 mm

4

20

5 mm

4

14

19

7 mm 10 mm

4 5

13

20 19

14 14

Quality Assurance


Dose and Performance 1 for MX165ZJ Tube

Explained below contains information that relates image quality to radiationdose, as required by the federal government, in compliance with FederalRegulations 21CFR 1020.33(c). The dose measurement procedure isdescribed in the Code of Federal Regulations 21CFR 1020.33. The Codeof Federal Regulations can be obtained from the U.S. government printingoffice or can be viewed from the World Wide Web.

Statement of Typical Technique

HEAD BODY 25 cm Field of View (FOV) 50 cm FOV 120 kVp 120 kVp 150 mA 130 mA 2.0 sec scan time 1.5 sec scan time 10 mm slice thickness 10 mm slice thickness

Large Focus Large Focus

CT Dose Index (CTDI) For Typical Technique At Various Positions On ThePhantom Image.

POSITION HEAD BODY A 6.9 rad 1.3 rad B 7.4 rad 2.7 rad C 7.1 rad 2.5 rad D 6.9 rad 2.0 rad

E 7.2 rad 2.5 rad CTDI has no angular maximum near the surface for 360° scanning

A

B

C

D

E

Quality Assurance


Dir. 2295148-100Rev. 0

Dose and Performance 1 for MX165ZJ Tube with SmartBeamFilter

Explained below contains information that relates image quality to radiationdose, as required by the federal government, in compliance with FederalRegulations 21CFR 1020.33(c). The dose measurement procedure isdescribed in the Code of Federal Regulations 21CFR 1020.33. The Codeof Federal Regulations can be obtained from the U.S. government printingoffice or can be viewed from the World Wide Web.




CT Dose Index (CTDI) For Typical Technique At Various Positions On ThePhantom Image.

POSITION HEAD BODY A 4.4 rad 0.9 rad B 4.3 rad 1.6 rad C 4.2 rad 1.5 rad D 4.2 rad 1.3 rad

E 4.4 rad 1.5 rad CTDI has no angular maximum near the surface for 360° scanning

A

B

C

D

E

Quality Assurance


CTDI Over A Range of Techniques

Normalized to a value of 1 for typical technique and position A. (All othertechnique settings at typical value.)

POSITION HEAD BODY10 mA A 0.06 0.07350 mA A 2.33 2.700.8 sec A 0.40 0.523.0 sec A 1.52 2.017.0 mm A 0.89 0.815.0 mm A 0.75 0.623.0 mm A 0.56 0.382.0 mm A 0.44 0.311.0 mm A 0.34 0.1680 kV A 0.38 0.30140 kV A 1.39 1.48

Explained below contains information that relates image quality to radiationdose, as required by the federal government, in compliance with FederalRegulation 21CFR 1020.33(c). Please review this information.

Helical Dose For Typical Helical Technique

HEAD BODY 25 cm Field of View (FOV) 50 cm FOV 120 kVp 120 kVp 150 mA 130 mA 2.0 sec scan time 1.5 sec scan time 10 mm slice thickness 10 mm slice thickness 10 mm interval 10 mm interval

If the Helical mAs, Slice Count and Intvl selection equals the Axial mAs,Slice Count and Intvl selection, then Helical dose equals Axial dose.

Quality Assurance


Dir. 2295148-100Rev. 0

CTDI Over A Range of Techniques with SmartBeam Filter



Explained below contains information that relates image quality to radiationdose, as required by the federal government, in compliance with FederalRegulation 21CFR 1020.33(c). Please review this information.

Helical Dose For Typical Helical Technique

HEAD BODY 25 cm Field of View (FOV) 50 cm FOV 120 kVp 120 kVp 150 mA 130 mA 2.0 sec scan time 1.5 sec scan time 10 mm slice thickness 10 mm slice thickness 10 mm interval 10 mm interval

If the Helical mAs, Slice Count and Intvl selection equals the Axial mAs,Slice Count and Intvl selection, then Helical dose equals Axial dose.

Quality Assurance


Dose and Performance 2

Explained below contains information that relates image quality to radiationdose, as required by the IEC standard, in compliance with IEC60601–2–44(1999–02).




CTDI100 For Typical Technique At Various Positions On The Phantom Image.

POSITION HEAD BODY A 70 mGy 12 mGy B 79 mGy 28 mGy C 76 mGy 26 mGy D 73 mGy 21 mGy

E 77 mGy 26 mGy CTDI100 has no angular maximum near the surface for 360° scanning

A

B

C

D

E

Quality Assurance


Dir. 2295148-100Rev. 0

CTDI100 Over A Range of Techniques



Quality Assurance


Dose and Performance 2 with SmartBeam Filter

Explained below contains information that relates image quality to radiationdose, as required by the IEC standard, in compliance withIEC60601–2–44 (1999–02).




CTDI100 For Typical Technique At Various Positions On The Phantom Image.

POSITION HEAD BODY A 45 mGy 8,4 mGy B 46 mGy 17 mGy C 45 mGy 15 mGy D 45 mGy 13 mGy

E 47 mGy 16 mGy CTDI100 has no angular maximum near the surface for 360° scanning

A

B

C

D

E

Quality Assurance


Dir. 2295148-100Rev. 0

CTDI100 Over A Range of Techniques with SmartBeam Filter



Quality Assurance


Dose and Sensitivity Profile at Phantom Center

Position (mm)0

0.5

1.0Axial, Body, Center,120 kV, 130 mA,10 mm, 1.5 sec.

70 1400

Position (mm)0

0.5

1.0

70 1400

Position (mm)0

0.5

1.0

70 1400

Axial, Body, Center,120 kV, 130 mA, 7 mm, 1.5 sec.

Axial, Body, Center,120 kV, 130 mA,5 mm, 1.5 sec.

Dose Profile Sensitivity Profile

Quality Assurance


Dir. 2295148-100Rev. 0

Position (mm)0

0.5

1.0Axial, Body, Center,120 kV, 130 mA,3 mm, 1.5 sec.

70 1400

Position (mm)0

0.5

1.0

70 1400

Position (mm)0

0.5

1.0

70 1400

Axial, Body, Center,120 kV, 130 mA,2 mm, 1.5 sec.

Axial, Body, Center,120 kV, 130 mA,1mm, 1.5 sec.


Quality Assurance


Position (mm)0

0.5

1.0Axial, Head, Center,120 kV, 150 mA,10 mm, 2.0 sec.

70 1400

Position (mm)0

0.5

1.0

70 1400

Position (mm)0

0.5

1.0

70 1400

Axial, Head, Center,120 kV, 150 mA, 7 mm, 2.0 sec.

Axial, Head, Center,120 kV, 150 mA,5 mm, 2.0 sec.


Quality Assurance


Dir. 2295148-100Rev. 0

Position (mm)0

0.5

1.0Axial, Head, Center,120 kV, 150 mA,3 mm, 2.0 sec.

70 1400

Position (mm)0

0.5

1.0

70 1400



Position (mm)0

0.5

1.0

70 1400


Quality Assurance


Image Performance

Noise

At Typical Technique In Center Of Phantom Using Standard Algorithm

HEAD BODYσ = 0.49 % σ= 0.47 %

MTF

(same conditions as above)

100

80

60

40

20

0 2 4 6 8 10

100

80

60

40

20

0 2 4 6 8 10

HEAD BODY

Line pairs/cm Line pairs/cm

MODULATION

(%)

MODULATION

(%)

Nominal Tomographic Section Thickness HEAD BODY10.0 mm 10.0 mm

7.0 mm 7.0 mm 5.0 mm 5.0 mm 3.0 mm 3.0 mm 2.0 mm 2.0 mm 1.0 mm 1.0 mm

Sensitivity Profile

See previous pages

Quality Assurance


Dir. 2295148-100Rev. 0

Phantoms and Procedures

Dose

For best results, use the phantoms, dose profile and CTDI value calculationprocedures recommended in the CDRH final draft of “Routine ComplianceTesting for Computed Tomography X–Ray Systems” dated April 26, 1984.

Also, for best results, use the phantoms and CTDIW value calculationprocedures recommended in the IEC committee draft for vote ofIEC60601–2–44, dated August 8, 1997.

Performance

Each test uses a 25 cm water–filled acrylic phantom

Noise

Noise equals the standard deviation of an array of pixels contained in 674mm square region of interest (ROI) for Head and 2696 mm square ROI forBody. The software divides the standard deviation, expressed inHoundsfield Units, by 1000 (representing the contrast scale between airand water), then multiplies by 100 to give a value in percent.

Modulation Transfer Function (MTF)

A point spread function (PSF) image is obtained by scanning the GEperformance phantom (2100614) wire section. Software performs a twodimensional Fourier Transform on the PSF to obtain the MTF.

Slice

Use a wire ramp section of Catphan phantom, inclined 23�from the scanplane.

Sensitivity

23� from the scan plane to obtain sensitivity profiles.

Quality Assurance


Deviations

In order to come up with “the maximum deviation,” manufacturers mustimagine every possible situation, however unlikely, that might occur withinthe entire user community. Our statements of deviation include a maximumdeviation to assure compliance with the regulation, as well as a statementof expected deviations (2σ) in the large majority of our systems.

CTDI and CTDIW Typical Techniques

The anticipated “maximum deviation” for CTDI and CTDIW equals ±40%.The expected deviation equals ±20%, except for the 40 mA or less and1mm techniques, where variation increases (up to a factor of two) due tothe inherent deviation in small values.

Dose Profile

Anticipate a “maximum deviation” of ± 30% or 2.0mm, whichever is larger,relating to dose profiles (FWHM). This value includes variability inherent inthe measurement of dose profile with TLD chips.

Performance

Noise : The noise squared (σ2) in a CT image is inversely proportional tothe x–ray dose used to make the image. The maximum deviationanticipated for image noise equals ±30%. Expected deviation equals±10%.

MTF: Expect deviations within ±10% for values on the MTF curvegenerated with data gathered according protocol. Maximum deviationsmay reach ±20% for other methodologies.

Sensitivity Profile: Expect the full width slice half maximum sensitivityprofiles to vary ±20% or 1.0 mm, whichever is larger, when measured witha wire ramp section of Catphan phantom, inclined 23�from the scan plane.If you use other methodologies, the maximum deviation may reach 1.5 mmfor all slice thicknesses, because these measurement errors have thegreatest effect on thin slices.

Quality Assurance


Dir. 2295148-100Rev. 0

Blank

Chapter 7


TECHNICAL SPECIFICATIONS

Component Identification for HiSpeed

Component Model Number Location of Name Plate CDRH Certified

Gantry 2200997,2200998,2200999,2201000

Rear lower center Yes

X–Ray TubeHousing

2199077–2 Housing surface Yes

X–Ray Tube In-sert

46–309300G3 Housing surface No

Collimator 2132959 Front of collimator Yes

Detector 2187725 Front left corner No

Table 2200192,2200291,2113694,2200290

Gantry side of pillar Yes

Cradle Extender 2201803 No

Operator Con-sole

2153675 Rear lower right corner Yes

PDU 2200194 Rear lower right corner Yes

Axial Headholder 2201806 No

Coronal Head-holder

2201805 No

25cm Phantom 46–237991G1 On holding block No

35cm Phantom 46–266754G1 On holding block No

42cm Phantom 46–241707P544 On holding block No

Specifications


Dir. 2295148-100Rev. 0

Component Labels

MODEL (Note 5)SERIALMANUFACTURED CLASS IVOLTS (Note 6) V~AMPS MOMENTARY (Note 7) AAMPS CONTINUOUS (Note 8) AkVA (Note 9) HZ (Note 10)

MADE FOR GENERAL ELECTRIC CO.MILWAUKEE WISCONSIN BYGE YOKOGAWA MEDICAL SYSTEMS, LTD.7–127 ASAHIGAOKA 4–CHOMEHINO–SHI, TOKYO, JAPAN

MODEL (Note 1)SERIALMANUFACTURED CLASS ISOURCE: (Note 2) A/ (Note 3) V ~(Note 4) HZSOURCE: (Note 2) A/ (Note 3) V ~(Note 4) HZSOURCE: (Note 2) A/ (Note 3) V ~(Note 4) HZSOURCE: (Note 2) A/ (Note 3) V ~(Note 4) HZ

MADE FOR GENERAL ELECTRIC CO.MILWAUKEE WISCONSIN BYGE YOKOGAWA MEDICAL SYSTEMS, LTD. 7–127 ASAHIGAOKA 4–CHOMEHINO–SHI, TOKYO, JAPAN

COMPONENT (Note 1)MODELNUMBER

(Note 2)SUPPLY CURRENT

(Note 3)SUPPLY VOLTAGE

(Note 4)SUPPLY FREQUENCY

Gantry 2200997, 2200998,2200999, 2201000

90A30A30A

15A

380–480V3

200V~115V~

115V~

50/60Hz50/60Hz50/60Hz50/60Hz

Table 2200192, 2200291,2113694, 2200290

10A 115V~ 50/60 Hz

Operator Console 2153675 20A 115V~ 50/60Hz

(SYSTEM)* HiSpeed LX/iHiSpeed FX/iHiSpeed DX/i

100A 380/400/415/440/460/480V3~

50/60 Hz

COMPONENT (Note 5)MODELNUMBER

(Note 6)SUPPLY VOLTAGE



(Note 9)

KVA

(Note 10)SUPPLY FREQUENCY

PDU 2200194 380/400/415/440/460/480V3~

100A 20A 65 KVA 50/60 Hz

Specifications


MX165ZJ X–Ray Tube Assembly Information

MX165ZJ Tube Unit Identification

System/Tube Catalog No.

Descriptiongraphiteanode

Casing Model Number

InsertModel Number

Insert Catalog No.

MX165 ZJ X–Ray tubeassembly

2199077–2 N.A.

Insert N.A. 46–309300G3 D3110T

Improvements in the heat handling capabilities of this unit may result in newcatalog and Model number assignments

MX165ZJ Diagnostic Source Assembly

Leakage Technique Factors

Tube Assembly Model No. 2199077 140 kV, 26 mA

Minimum Inherent Filtration (Collimator model No. 2132959, 2247199)

Minimum inherent filtration of 2.7 mm aluminum equivalent at 140 kV:� Tube Unit:

Tube Insert – 0.8 mm aluminum equivalent at 140 kVTube Housing – 0.4 mm aluminum equivalent at 140 kV

� Collimator (lower plate) – 0.5 mm aluminum

� Collimator (upper plate) – 1.0 mm aluminum

Minimum Inherent Filtration (Collimator model No. 2247203, 2222390,2247019)

Minimum inherent filtration of 6.2 mm aluminum equivalent:� Tube Unit:

Tube Insert – 0.8 mm aluminum equivalent at 140 kVTube Housing – 0.4 mm aluminum equivalent at 140 kV

� Collimator (lower plate) – 0.5 mm aluminum

� Collimator (upper plate) – 4.5 mm aluminum equivalent at 70 kV

Specifications


Dir. 2295148-100Rev. 0

MX165ZJ CT Scan Ratings

These ratings apply to CT systems with computer controlled techniqueselection, scan mode, scan duration, and scan series. The software uses acooling algorithm to determine anode and tube unit temperatures andcooling delays. When necessary, the cooling algorithm delays scan initiationto avoid exceeding maximum anode or tube unit temperatures.

TARGET LOADING in Kilowatts FOR EACH SCAN TECHNIQUE

mA 80 KV 120kV 140 kV

60 4.8 7.2 8.4 80 6.4 9.6 11.2 100 8.0 12.0 14.0 130 10.4 15.6 18.2 160 12.8 19.2 22.4

200 16.0 24.0 28.0250

The following table lists cooling delay times (in seconds) used by thesoftware before each scan. These times assume maximum anode or tubeunit heat loading and include cycling the rotor for each scan.

Model No. MX165ZJ COOLING DELAY TIME at 80kV

80kV and 60mA S 132 132 80mA S 132 132100mA S 132 132130mA S 132 132160mA S 132 135200mA S 132 139250mA S 132 150

Scan Focus Anode Cooling Delays Technique Size 2.0 sec 3.0 sec

Specifications


Model No. MX165ZJ COOLING DELAY TIME at 120kV

120kV and 60mA S 132 132 80mA S 132 132100mA S 132 135130mA S 132 138160mA S 135 138200mA S 249 307


Model No. MX165ZJ COOLING DELAY TIME at 140 kV

140kV and 60mA S 131 132 80mA S 132 135100mA S 133 139130mA S 133 142160mA S 191 232


Specifications


Dir. 2295148-100Rev. 0

MX165ZJ X–Ray Tube IEC Information

X–ray Tube Housing

Type General Electric MX165 ZJ HSG

Model 2199077–2

X–ray Tube Insert Fitted

Type General Electric MX165 ZJ INSERT

Model 46–309300G3

X–ray Tube Assembly

In accordance with IEC 637/1979, the complete X–Ray tube assemblycarries two identification labels, one each for the housing and insert, markedwith the model types and numbers listed above.

X–ray Tube Insert Information

Type General Electric MX165 ZJ INSERT

Model 46–309300G3

Focal spot SE: 0.9mmW x 0.62mmL; LF: 1.2mmW x 1.2mmL

Target Material Tungsten/Rhenium Alloy Focal Track on graphite base

Target Angle 7�

Maximum Potential Difference 140 kVp

High Potential Generator : General Electric CT HiSpeed System ConstantPotential

X–Ray Tube Filament Supply: Maximum Voltage: 140kVMaximum Current : 350mA

Specifications


MX165ZJ Cathode Emission and Filament Characteristics

HiSpeed Emission Z1163 7� TargetLarge Focal Spot

��

��

��

��

Filament Current (amps)

Tube Current (mA)

80 kVp 120 kVp 140 kVp� � �

HiSpeed EmissionZ1163 7� TargetSmall Focal Spot

��

��

��

��

Filament Current (amps)

Tube Current (mA)

80 kVp 120 kVp 140 kVp� � �

Specifications


Dir. 2295148-100Rev. 0

Nominal Anode Input Power

This tube accommodates GE HiSpeed Computed Tomography Systems witha nominal anode input power of 42 kW for 3 seconds.

Maximum Anode Heat Capacity

3500kHU

Maximum Anode Heat Dissipation

820kHU/min

Specifications


Tube MX165 ZJ Anode Heating and Cooling Curves

��

��

��

��

��

��

��

� ��

TIME (SECONDS)

HiSpeed Anode Heating Curve

35kW

10kW

20kW30kW

�

��

��

��

��

��

��

��

��

��

��

��

��

��

� � ��

TIME (MINUTES)

HiSpeed Anode Cooling Curve

Cooling and heating curves reflect maximum tube performance.System software monitors and controls tube operation.

Single Load Rating

Large Focal Spot: 42 kW for 3 secondsSmall Focal Spot: 24 kW for 3 seconds(Same as the nominal anode input power)

Serial Load Ratings

Controlled by the HiSpeed CT system operating software

Rotating Anode Supply

Designed to operate on the HiSpeed CT system (See accompanying systemdocumentation.)

NOTE�

Specifications


Dir. 2295148-100Rev. 0

MX165ZJ X–Ray Tube Assembly Information

Labels : The X–Ray Tube Assembly carries two identification labels. Onelabel identifies the Model and serial numbers of components (X–Ray Tubeand Housing), and provides the date and location of assembly manufacture.The second label provides the name of the manufacturer. A third labelcertifies compliance with USA Federal regulation 21 CFR Sub chapter J, andlists the data and place of assembly manufacture.

Reference Axis: Normal to the window center.

Target Angle : 7�

Nominal Focal Spot Values : Small Focal Spot: 0.9 W x 0.62 L mm Large Focal Spot: 1.2 W x 1.2 L mm

Focal Spot Modulation Transfer Functions: MTF for X–Ray TubeAssembly Standard magnification = 1.3

��

��

��

��

��

��

��

��

��

��

��

��

MODULATION TRANSFER FUNCTIONLENGTH DIRECTION

0.9mm W x 0.62mm L FOCAL SPOTSTANDARD MAGNIFICATION 1.3

AEC 336/1982 – NEMA XR–5

SPATIAL FREQUENCY – LINE PAIRS/mm

��

��

��

��

��

��

��

��

��

��

��

��

MODULATION TRANSFER FUNCTIONLENGTH DIRECTION


AEC 336/1982 – NEMA XR–5


Specifications


��

��

��

��

��

��

��

��

��

��

��

��

MODULATION TRANSFER FUNCTIONWIDTH DIRECTION


AEC 336/1982 – NEMA XR–5


Maximum Potential Difference : 140 kVp

Inherent Filtration

1.2 mm Al at 140 kV Tube 0.8 mm AlIEC 522/1976 Housing 0.4 mm Al

Electrical Connections

See curves and diagramsEmissions CharacteristicsConnection stator, Thermal and Pressure overload switches

Principle Dimensions

Length 21.14 inches (53.7cm)Height 11.26 inches (28.6cm)Depth 29.25 inches (74.3cm)Weight 69.1 kg (± 10%)

X–Ray Tube Conditioning

The HiSpeed system software controls X–Ray tube conditioning. (Seeaccompanying system documentation.)

Maximum X–Ray Tube Assembly Heat Storage Capacity

3.5MHU

Continuous Heat Dissipation of X–Ray Tube Assembly

X–Ray Tube and Heat Exchanger 300kHU/min

Specifications


Dir. 2295148-100Rev. 0

Tube Assembly MX165ZJ Heating and Cooling Curves

�

��

��

��

��

��

� ��

MX165ZJ Housing Cooling Curve

Time (Minutes)

Sto

red

Hea

t (K

ilojo

ule

s)

�

��

��

��

��

� � ��

MX165ZJ Housing Heating CurvesTemperature Degrees Celsius

Time (Seconds)

6kW 5kW 4kW

3kW

2kW

1kW

Sto

red

Hea

t (K

ilojo

ule

s)Cooling and heating curves reflect maximum tube performance.System software monitors and controls tube operation.

Leakage Radiation – Loading Factors

Specified values of the loading factors determining measures for protectiveshielding of X–Ray Tube Assembly against leakage radiation according toIEC publication 407/1973 are 140 kVp – 26 mA

Classification

IEC publication 536 /1978 and IEC Publication 601–1 Class 1

Transportation and Storage

–20° to +70° C, up to 95% Relative Humidity (non–condensing)Commercial airlines accept X–Ray tube insert/housing shipments

Transport Packaging

Transport ONLY in packaging supplied by General Electric

NOTE�

Specifications


Generator Specifications

Main Power Supply

� Line voltage (no–load) 415 or 380 or 480 VAC

� 3–phase, 50 or 60 Hz ±0.5 Hz.

� Phase–to–phase balance within 3% of lowest phase–to–phase voltage.

� Line regulation 5% or less at maximum technique factor.

� Maximum line current demand, 100 Amps RMS (50/60 Hz) at 140 kV, 300mA.

Generator Rating and Duty Cycle

� Maximum Technique: 140 kV, 300 mA

� Maximum Output Rating: 80kVA

� Generator Duty Cycle:

Maximum Technique Factor Max. Duty Cycle

140kV and 300mA 10%

kV, mA, and Timer Accuracy

Mode Condition Accuracy

Kilovoltage:Axial 120kV ± 7% of kV settingExcluding initial 5 msec

Milliamperage: Axial 10 to 350mA ± 5 % of mA setting or± 1mA (whichever is more)

Excluding initial 100 msec

Specifications


Dir. 2295148-100Rev. 0

Scan Time: Axial

Selected Scan Time (sec) Actual Scan Time (sec)

3.0 3.0 ± 10%

2.0 2.0 ± 10%

1.5 1.5 ± 10%

1.0 1.0 ± 10%

0.7(half scan) 0.7 ± 10%

kV : Subject to an additional ± 5% accuracy of instrumentation used for calibration and measurement.

mA : Subject to an additional ± 5% accuracy of instrumentation used for calibration and measurement.

Exposure : Subject to an additional ± 3% accuracy of instrumentation used

Time : for calibration and measurement.

Accuracy subject to the following conditions: 1. Line regulation 5% or less. 2. Line voltages within this specified range: 415 or 380 or 480 VAC +6% –5% (50 or 60Hz)3. System powered for at least 30 minutes prior tomeasurements. 4. Line voltage variations caused by external loads should notexceed 1% or last longer than 0.5 second while scanning.

Measurement Basis

Tube Potential : Precision voltage divider, Model No. 46–154966G1 reduceshigh voltage generated across anode and cathode by 1000:1. TubePotential equals the average kilovoltage generated during the exposure,excluding transients at the beginning and end. See Section 2 of the X–rayAlignment procedure in the Service documentation for the completemeasurement procedure.

Tube Current : Tube current equals the average milliamperage generatedduring x–ray exposure. See Section 2 of the X–Ray Alignment procedure inthe Service documentation for the complete procedure.

Scan Time: Exposure time intervals equal the time during which thekilovoltage equals or exceeds 75% of its peak value. Measure kilovoltagewith a precision voltage divider and an oscilloscope. Use the time base ofthe oscilloscope to measure exposure duration.

NOTE�

Specifications


The Attenuation Equivalent

Standard Head Holder : 0.3 mm aluminum equivalent at 100 kV

Shallow Head Holder : 0.35 mm aluminum equivalent at 100 kV

Coronal Head Holder : 0.8 mm aluminum equivalent at 100 kV

Cradle : 0.55 mm aluminum equivalent at 100 kV

Extender : 1.5 mm aluminum equivalent at 100 kV

CAUTION

To obtain the optimum results, make sure nothing is left in the pathof X–ray beam that may have adverse effects on examinations.

Specifications


Dir. 2295148-100Rev. 0

Periodic Maintenance by Qualified Personnel

Recommended PM frequency is 2 times a year for NP+/NP series scanners.The frequency may vary due to local ordinance and the usage of the system, thesystem availability etc. If you need more PMs, order extra copies of this document orcopy the schedules.

Priority Code

Pr (Priority) – Description

1 Safety and Regulatory

2 Image Quality

3 Procedures that make the system unavailable for scanning

4 Procedures that can be performed while the customer is scanning

Frequency Code

Fr (Frequency) – Description

S Semi–Annually (every 6 months)

A Annually (every 12 months)

Safety and Regulatory

ITEM SUB– DESCRIPTION Pr FrAnnual PM Schedule

ITEM SUBSYSTEM DESCRIPTION Pr Fr

A B

PM0101 System Verify Emergency OFF buttons (Gantry /Console / PDU)

1 S � �

PM0102 System Check x–ray ON lights or buzzer/opera-tion of scan abort

1 S � �

PM0103 System Caution Label Check 1 S � �

PM0105 System Check Error Logs 1 S � �

PM0301 Gantry Check the number of Gantry revolutions 1 S � �

PM0201 O.C Verify Audio Function 1 S � �

PM0501 Table Check Head Holder 1 S � �

PM0502 Table Check Table Cover 1 S � �

PM0503 Table Check Gap sponge 1 S � �

PM0504 Table Gap between Table Cover and Cradle 1 S � �

PM0505 Table Check Cradle Rail 1 S � �

PM0506 Table Holder Stability Check 1 S � �

PM0507 Table Check Touch Sensor operation 1 S � �

PM0508 Table Verify Unlatch Function 1 S � �

PM0509 Table Check Gantry / Table interlock 1 S � �

PM0607 XG Check Parts 1 S � �

Specifications


Image Quality



A B

PM0104 System Image Check (Image Performance) 2 S � �

PM0302 Gantry Clean Mylar ring cover 2 S � �

PM0401 DAS Check/Clean Detector face 2 S � �

Subtotal 1:00 1:00

System Performance



A B

PM0106 System Perform Filter Curve Test 3 A 0:15PM0107 System Check Ground Cable Terminals 3 A 0:10PM0108 System Check DAS Count 3 A 0:15PM0109 System Image Performance 2 A 1:00PM0202 O.C Clean Air Filter 3 S 0:10 0:10PM0203 O.C Inspect FANs 3 S 0:10 0:10PM0204 O.C Verify Mouse for smooth operation 3 S 0:15 0:15PM0205 O.C Clean Display monitor/Console exterior 4 S 0:10 0:10PM0206 O.C Check Cables / Power Cable Terminals 3 S 0:10 0:10PM0303 Gantry Verify cables and hardware are tight 3 S 0:20 0:20PM0304 Gantry Gantry cover cleaning 4 S 0:10 0:10PM0305 Gantry Check Positioning lights 3 S 0:10 0:10PM0306 Gantry Check Gantry anchor / Gantry Isolation 3 A 0:05PM0307 Gantry Main bearing grease–up 3 A 0:20PM0308 Gantry Check drive belt for wear 3 A 0:05PM0309 Gantry Check RF Shoe Position 3 A 0:10 0:10PM0402 DAS Verify Detector Heater Control 3 S 0:05 0:05PM0403 DAS Inspect FANs 3 S 0:05 0:05PM0510 Table Clean Cradle tray / Table cover 4 S 0:15 0:15PM0511 Table Check for Oil Leak 3 S 0:05 0:05PM0512 Table Grease–up 3 A 0:20PM0513 Table Check Table anchors / Table isolation 3 A 0:05PM0514 Table Inspect FANs 3 S 0:10 0:10PM0515 Table Inspect Cradle Wire Tension 3 S 0:10 0:10PM0601 XG Check/Clean Radiator FAN 3 S 0:10 0:10PM0602 XG Check X–ray tube oil and HV connector 3 S 0:20 0:20PM0603 XG Check HV Tank and HV connector 3 S 0:20 0:20PM0604 XG Check Power cable connection 3 S 0:05 0:05PM0605 XG Check Tube over heat safety 3 S 0:15 0:15PM0606 XG Check KV and mA 3 A 1:00PM0701 PDU Inspect FANs 3 S 0:05 0:05PM0702 PDU Check Power Cable Terminals 3 A 0:05PM0703 PDU Check Power Line Voltage 3 A 0:05

Subtotal 4:30 6:55Total 5:30 7:55

Specifications


Dir. 2295148-100Rev. 0

Maintenance by CT Users

The following maintenance by CT users is highly recommended.

Periodically check if those items function properly.

� Emergency stop : Press the button to confirm the system stops.

� Cradle latch operation : Press the button to confirm the cradles latches.

� Clean covers

Specifications


Symbols and Classification

Symbol Publication Description

~~~

3

3N

417–5032

335–1

335–1

417–5019

348

417–5008

417–5007

Alternating Current

Three–phase alternating current

Three–phase alternating current with neutral conductor

Protective earth (ground)

Attention, consult ACCOMPANYING DOCUMENTS

OFF (Power: disconnection from the mains)

ON (Power: connection to the mains)

Dangerous voltage

Direct Current

Emergency Stop

Warning sign

RADIATION of LASERAPPARATUS

Specifications


Dir. 2295148-100Rev. 0

Symbol Publication Description

417–5339

417–5009

X–Ray source assembly Emitting

Stand by

Type B Applied Part

Abort

Start

Table Set

Intercom

(On Operator Console)

Power ON

Stand by Light OFF

Light ON

Specifications


Symbol Description

Microphone (Mic)

Contrast

Brightness

System storage prior to installation: Maintain storage temperature between –10o C and +60o

C (–14o to 140o F)

System storage prior to installation: Maintain non–condensing storage humidity below 95%

DO NOT store system longer than 90 days

System storage and shipment Maintain Air Pressure between 750 and 1060hPa

50°C

Air Pressure

700–1060hPa

Humidity 10–90%Excluding Condensation

Specifications


Dir. 2295148-100Rev. 0

Class 1 Equipment

Any permanently installed equipment containing operator or patientaccessible surfaces must provide backup protection against electric shock, incase the BASIC INSULATION fails. In addition to BASIC INSULATION,Class 1 equipment contains a direct connection to a PROTECTIVE (EARTH)CONDUCTOR which prevents shocks when a person touches a brokenpiece of equipment or touches two different equipment surfacessimultaneously.

Type B Equipment

CLASS I, II, or III EQUIPMENT or EQUIPMENT with INTERNALELECTRICAL POWER SOURCES provide an adequate degree of protectionagainst electric shock arising from (allowable) LEAKAGE CURRENTS or abreakdown in the reliability of the protective earth connection

Ordinary Equipment

Enclosed EQUIPMENT without protection against the ingress of water.

Operation Of Equipment

CONTINUOUS OPERATION WITH INTERMITTENT LOADING.

Operation in which EQUIPMENT is connected continuously to the SUPPLYMAINS. The stated permissible loading time is so short that the long termon–load operating temperature is not attained. The ensuing interval inloading is, however, not sufficiently long for cooling down to the long termno–load operating temperature.

EQUIPMENT not suitable for use in the presence of a FLAMMABLEANESTHETIC MIXTURE WITH AIR or WITH OXYGEN or NITROUS OXIDE.

Specifications


Cleaning

The CT system is not waterproof. It is not designed to protect internalcomponents against the ingress of liquid.Decontamination or cleanliness of the CT system (i.e. gantry, table, consoleand accessories) is the sole responsibility of the health care provider owningand/or operating the CT system.

Tips for Cleaning : � Use soft cloth damped with (hot) water to remove any dirt or stains. � Even blood stains can be wiped off with damp soft cloth.

Caution :Avoid chemical damage to surfaces. Some detergent or cleaning agent maydamage the surface.

Disclaimer :GEMS bears no responsibility for sterilization of system surfaces.GEMS shall not be held liable for any contagion which may have stemmedfrom contaminated stains on the system surfaces.

Specifications


Dir. 2295148-100Rev. 0

Blank page

�

��

��

��

��

��

��

��!��

��"��

��#��$��"��

��%��&'��"

�(��)��*��"�"�

+�(��"�"�

,��-��"�"�

.��/��"�"

/��'��0��"�"1

/��"�""

�(��)��.��2��"�"

��.��2��"�"

�(��)��.��"��

3!��4��"�

3/��4��"��

3��4��"��5

3#��24��"��1

��0��"� "

��"��

��$��"� �

��/(��"� 5

��"��"

��$��"� �

��+�&��"� �

6��0��"� 5

*��*(��"� �

0��"��

��"��"

7��%��"��

+�(��"� �

,��-��"� �

,��8�/(��"� �

.��"� �

.��%��&��"� 1

.��/��"� �

.��%�-��/��"� �

/��"� "

/��"� �

/��"��

��+�&.��"� �

�9�&'��8��"� ��"��

�9�&/��: :��"��

��.��"� 5�"�5

��/��;,��<��"��

��!��"��

��0��"� "

=��&)*��"��

�

��"�"1

�

��.��"

��7�),��"

*(��'��>��5

!��"

0��#��5

0��#��'��5

7-�-�%��5

7��'��>��5

.��2'�29��5

.��5

#��)6�&��"

#��/��2�?��/��2��5

�

6��.��#��@�� 1

6��.��

6��$��7��A��

6��$��'��>��

7��$��1

.��2'�29�,�),$$��1

/��'��>��1

#��)��2��/��2��

BA��,��

6��.��$�� "

��'�%�� 5

��/�� 1

+�(�).��*��9=��&�� 1

+�(�).��2�� 1

�

!7'-7+0��5��

��!��5��

��!��5�"

��.��5��

��5�5

��5��

6��5��

*(��.�2�)��.�2��5��

!��6��5�

!��5�

��5��

�9�&0��5�"

��8��5��

B/�$A��5�"

��!��5��

-��!��5��

-��!��5��

!�$��>��5��

! $��>��5��1

!�$��>��5��1

!"$��>��5��

�

0��

��.��

6��$��

6��.��

*��2��

0��$��

.��2'�29�?��9+�%��

BA��#��$��

�

7��2�6��'��

�

'��)��1

-��!��

-��

-7/,7;-��7��2�/,7<��

/��.�(��

+�&.�� 5�"�"

�

,��

��)-��

-,66��%��

��)6��-��

�

.��.��2��"��

'��>��"��

.��9��

��.��

6��

6��

*��.��

.��$��

��.�� 1

=��&-��7�$�� 1

.��)��=��&��

.��-��2��

��=��/��

.��-��2��

3!��4��

3/��4��

3��4��

3#��24��

C��'7#D��/�+�*��

6��.��$��"��1��

��29��/��

7��2�.��$�� 5

'�&��6��

+��$��

.9��6��

.9��

��9�C�.9��"

��#9��>��1

@��29��#67��

�

/��-��2�� 5

/��/��

/�%��&'��

-��7��2�6��;-76<��

/��6��

��/�$��1

6��+��"

*��/,7��5

*��

*(��.2)��.2��

*(��-�2��$��

!��)/��

0��

0�*��"

��)�9�&0��9��

'��)��5

-��6��

.��=��&��

/��)E��

��%��

��

�

��

/�&6��!��

�� "

��"��

��"�1

��$��"��

��+�&��"��

6��"�1

*��*(��"�1

+�(��"�1

,��-��"��

.��"��

/��"��

/��"��

��.��2��"��

��+�&.��"�1

��.�&��,�),$$��

�

#��

��

!��&��9��

��.��

'��9��

��>��

#��$��

�

��7��$��

��

��"

��>��"

��A��

-��

LXi.pdf

Documents

Transcript of LXi.pdf