JustVision_Knobology

8/13/2019 JustVision_Knobology

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Knobology Instructions

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This document describes controls on the Keyboard and Function panel of the JustVision

Ultrasound Console. Diagrams with number codes are included on pages 1-2.

For nomenclature of this document, K will refer to Keyboard controls, and F will referto Function Panel controls.

4 Steps to Begin Scanning

1. Turn on power by moving the GREEN power switch to the up position. (2 switches onthe JV400).

2. Press New Patient Control .3. Press Program Preset. Choose exam type by pressing the corresponding number

on the keyboard.4. The cursor will default to the Patient ID Field. Using the alphanumeric characters on

the keyboard, enter the patients name.

Begin scanning

Image Optimization (During Exam)

TGC Time Gain Compensation

Time Gain Compensation (TGC) allows for amplification of the returning sound waves. The

further a sound wave travels, the more its returning echo diminishes in strength. For this reason,

the sound waves returning from greater depths must be boosted. TGC allows for more finiteand accurate adjustments of the returning echos from specific depths by allowing you to boost or

reduce them independently. As an analogy, TGC functions much like an equalizer on a stereo

system. Rather than adjusting the volume of the entire sound spectrum (Gain), you can adjustindividual bands.

To adjust TGC:

Slide the pods to the right to increase gain, to the left to decrease gain. Keep pods adjusted for uniform tissue echogenicity. A lower setting in the near field is optimal for resolution and near-field distinction.

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IP The IP knob is multi-functional.

It controls the Operating Frequencywhen pushed.

The JustVision Ultrasound can operate at 3 distinct center frequencies. This center frequencylies in the middle of the Broad Band Imaging spectrum. By use of Dynamic Echo Tracking, the

JustVision transmits sound waves in the frequency ranges above and below the center frequency.

As a reminder, the relationship between frequency, resolution and depth is as follows:

As Frequency increasesresolution increases, penetrable depth decreases. As Frequency decreasesresolution decreases, penetrable depth increases.

Pushing the IP Knob will change the Center Frequency. The screen indicator for the Center

operating frequency is in the upper right hand corner of the monitor. The unit must be in real

time to change the Center Frequency (NOT in freeze mode discussed later).

Center Frequency .Broadband Spectrum...

C60 5.0MHz (High end at 7.0 MHz, low end at 3.5 MHz)

C60 6.0MHz (High end at 8.0 MHz, low end at 4.0 MHz)C60 7.0MHz (High end at 9.0 MHz, low end at 5.0 MHz)

IP The IP knob is multi-functional.

It controls Image Processingwhen turned.

Image processing controls the contrast and grayscale parameters of the screen image. IP ismeasured on a scale from 1 to 8. The unit must be in real time to change the IP (NOT in freeze

mode discussed later).

The screen indicator for IP value is in the lower right hand corner of the monitor. It is the first of

two numbers (the second number refers to the Gain setting, discussed later):

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Settings 1-4have more contrast and edge enhancement (1 or 2 is ideal for cardiac imaging).

Settings 5-8produce smoother images with more grayscale (5 or 6 is ideal for abdominal).

Depth

The Depth setting adjusts the field of view that is displayed on the screen. This setting does

NOT adjust the depth that the sound waves actually travel. The depth of actual sound wave

travel can only be controlled by changing the center frequency (discussed above). The screenindicator for depth is in the lower right corner of monitor (in centimeters).

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To adjust the field of view depth:

Dial left to increase depth (increase field of view). Dial right to decrease depth (decrease field of view).

Gain The Gain control adjusts the amplification of all RETURNING echos across the entire imagingspectrum. This setting does not increase the strength or amount of sound waves being

transmitted those values are inherent to the transducer being used and cannot be adjusted.

Gain is measured on a scale of 60-100. The Gain screen indicator is in the lower right corner of

the monitor (displayed with the IP setting discussed above).

5 / 80 (Default setting = 80)

To adjust the Gain:

Turn the Gain knob clockwise to increase amplification. Turn the Gain knob counter-clockwise to decrease amplification.

FREEZE & PLAYBACK OF IMAGES

FreezePressing the Freeze button will freeze the current image on the monitor.

CINE-loop IP The IP knob is multi-functional.

It controls CINE-Loopwhen FREEZE mode is engaged.

CINE-Loop is the capture of a clip of images. The JustVision series is constantly maintaining

a 1-2 second memory of images (while in B-Mode). Pressing the Freeze button, as above, will

display the most recent image (frame).

The IP button controls CINE-Loop once Freeze has been engaged. (Remember, this same button

controls depth and frequency when Freeze is NOT engaged).

To control CINE-Loop Playback:

Press once to replay the memory loop at full speed. Press again to replay the loop at half speed, and a third time to replay at quarter speed. Turn the IP knob to replay the loop frame by frame. A CINE-loop may contain anywhere

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from 32-96 separate frames. The Frame indicator is located in the upper right corner of

the monitor screen and displays the frame number. Also, RT = first frame, LT = last

frame.

Pressing Freeze will return the system to live scanning, and the IP knob will resume prior

controls.

Annotations ABC

Annotations can be added to any image currently displayed on the screen (live or frozen).

Pressing the ABC button on the Keyboard will display the annotation cursor. The trackball isused to move the cursor to the location at which you want to make the annotation.

After pressing the ABC button, annotations can be added in the following ways:

Dial the multi-functional dial to scroll through pre-programmed labels. Enter labels by typing with the keyboard. Press the MENUkey. Scroll with trackball to highlight the desired label, or press

NEXT to view additional label selections. Press SET to select label.

To add multiple annotations to the same image, press the ABC button again and repeatthe steps above.

To delete screen annotations, press the Delete key on the keyboard.

PrintPressing the Print button will print the current screen image (provided the printer is installed).FREEZE mode must be engaged for this feature to work. Return to live scanning by pressing

Freeze.

MEASUREMENTS: B-MODEMEAS 1 The first measurement tool is used to determine lengths and distances.

Press the MEAS 1 key. A cross-hair caliper appears. Using the trackball, position the caliper and press SET. A second caliper appears, position the trackball at the other end point and press SET.

The measurement value appears on the lower portion of the monitor.

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A second distance measurement can be acquired.

Push NEXTto display a second set of calipers, and repeat the steps as above.

MEAS 2 The second measurement tool is used to determine area and perimeter measurements (trace).

Press the MEAS 2key. A cross-hair caliper appears. Using the trackball, position the caliper and press SET. Move the caliper to an adjacent area on the perimeter of the structure being measured and

press set. Continue until the structure being measured is surrounded. (The number of

markers required will depend on the shape and curvature of the area being measured.

Push NEXT a final time, and the system will draw a line connecting the markers.Area Aand Length Lmeasurements will appear on the lower portion of the screen.

MEASUREMENTS: M-MODE

Acquiring the Best Image for M-Mode Measuring:

Press M/B to split the screen. On the B-Mode image, position the dotted cursor with the trackball to dissect the area

to be measured. The corresponding M-Mode image will be displayed.

Adjust the TGC and Gain to sharpen the wall margin definition in the m-mode image. Usethe Sweep Speed (User Function F4 controls) to adjust the M-Mode speed.

(Slower for Bradycardia, faster for Tachycardia).

When the desired image is obtained, press Freeze.

MEAS 1 The first measurement tool is used to determine Left Ventricular Function (wall thickness,fractional shortening, etc.)

Press the MEAS 1 key. A cross-hair caliper appears. Using the trackball, position the caliper to the IVS during

Diastole. Press SET. Move the cursor and repeat for LV and Posterior wall positions in Diastole. After these 3 measurements have been SET, press NEXT. Repeat the same three measurements during Systole. (See the basic manual for an

example).

The various measurements are calculated and displayed on the screen.

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The JustVision Report Package allows you to take an averageof up to three separate

measurements. Obtain the first set of measurements as above. To enter them into the Report

Package:

Push User Function F1. This enters the measurements into the cardiac reportpackage.

To acquire a second (and third) set of measurements:

Turn off MEAS 1, resume scanning,and capture another M-Mode image. Press MEAS 1and the previous measurements will be displayed. Press the NEXTbutton until the diastolic measurements are highlighted. Press SET.

The previous measurements will be deleted from the screen (but kept in the Report

Package memory).

Repeat as above for the second set of measurements. Press User Function F1to enter into package. (Accessing the Report Package is

described below).

Repeat process for a third set of measurements if desired.

MEAS 2 The second measurement tool is used to calculate Left Atrium/Aortic Ratio.

With MEAS 2highlighted, move and set the cursor as described previously to measure the left

atrium and aorta. Measurements are displayed on the monitor and can be entered into the ReportPackage for averaging as above.

REPORT PACKAGE

Press MENU .

Use the trackball to scroll to REPORT and press SET. The report will be displayed.

(Note that the last 3 measurements will always be maintained. For this reason it is

important to create a New Patient for each case to clear the memory.)

To print a copy of the report press PRINT while the report is displayed on the monitor.To exit the report press MENU , scroll to return, press SET.

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ADDITIONAL KNOBOLOGY

Dual Screen

This feature splits the screen for two real-time B-mode images.

Press Dual to activate the left screen. Obtain the desired image. Press Dualagain to freeze the left image. The right screen will activate. When the desired image is obtained on the right side, press the Freezebutton. Press Freezeagain to unfreeze the image.

(To unfreeze a particular side, press the Dualkey until the indicator dot on the bottom of the

screen indicates which side is activated.)

Press the B Single key to return to a single image screen.

Body MarkThis feature provides anatomical icons for documenting and annotating scanning planes.It is not commonly used in veterinary medicine.

Pan/Expand This feature expands and magnifies the screen image. It will expand the image from a point in

the center of the screen. This feature does not work in Freeze mode.

To control Pan/Expand:

Press Pan/Expand ,then turn the multifunction dial . Turn clockwise to expand, counterclockwise to shrink. Use the trackball to pan the image vertically to visualize the far or near field views.

USER FUNCTION KEYS

The User Function Keys have been pre-programmed by Sound Technologies.

F1 Average (Enters cardiac measurements into cardiac package to average)

F2 Turn characters on/off on the monitor (image remains) F3 Turn image on/off (characters remain) F4 M-Mode sweep speed adjustment F5 High Frames Per Second (HFPS). Doubles the frame rate by reducing chevron F6 EPSS measurement (Measurement 3)

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