4D in Motion - Radiation Protection Solutions · PTW-Asia Pacific Ltd. Unit 2203, 22/F The...
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Turnkey Solution for 4D IMRT QA IMRT QA 4D in Motion
Transcript of 4D in Motion - Radiation Protection Solutions · PTW-Asia Pacific Ltd. Unit 2203, 22/F The...
Turnkey Solution for 4D IMRT QA
i M r t Q a
4D in Motion
OCTAVIUS® 4D Highlights
}Thousands of measurement points over the entire volume The OCTAVIUS detector rotates synchronously with the gantry,
measuring a dose plane for each gantry angle. Unlike other
systems, OCTAVIUS 4D makes it possible to verify the dose inside
the entire phantom volume, including the clinically relevant
target volume around the isocenter (Fig. 1).
}Isotropic geometry The unique rotating OCTAVIUS 4D phantom always aligns the
detector perpendicular to the beam, thus eliminating any angular
dependence of the detector response (Fig. 2).
}True independence OCTAVIUS 4D is the only 4D dosimetry system that verifies the
dose based on truly independent measurements. It does not
need a connection to the LINAC or TPS, but uses ion chamber
measurements and PDD curves as a basis for 3D dose calculation.
}Cutting-edge detector technology OCTAVIUS 4D uses Gold Standard ionization chambers which
are not subject to radiation damage and achieve a significantly
higher field coverage than diodes.
}3D volume analysis and CT overlay VeriSoft is the most comprehensive software for IMRT patient
plan verification, offering advanced tools for visual and quanti-
tative dose comparison, including 3D volume analysis and
patient CT overlay.
}Suitable for other PTW arrays OCTAVIUS 4D supports other PTW detector arrays, including
the widely used 2D-ARRAY seven29 and the new OCTAVIUS
Detector 1000SRS * for SRS/SBRT patient plan QA, which can
be conveniently upgraded to 4D dosimetry.
* upgrade available mid-2012
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Following the rotation of the gantry, OCTAVIUS® 4D acquires thousands
of measurement points over the entire phantom volume, including the
clinically relevant target volume around the isocenter.
When form follows function in IMRT treatment plan verification.
OCTAVIUS 4D is a new 4D dosimetry system designed to support
you in precisely verifying IMRT and IMAT treatment plans based on
truly independent measurements.
Dose measurements are performed with a high-resolution OCTAVIUS
ionization chamber array, which is inserted into a motorized cylin-
drical phantom. The unique OCTAVIUS 4D phantom is controlled
by an inclinometer attached to the gantry. Reading the inclinometer’s
output, it rotates the OCTAVIUS detector synchronously with the
gantry, allowing you to collect thousands of measurements points,
thus covering the entire phantom volume.
As the OCTAVIUS detector is always aligned perpendicular to the
beam, OCTAVIUS 4D requires no angular corrections or detector-to-
detector dose calibrations, making it your perfect choice for rota-
tional IMRT delivery techniques and easy-to-use in clinical routine.
The intuitive, workflow-oriented VeriSoft software helps you to
compare your measurements efficiently against TPS calculations in
transverse, coronal and sagittal planes, to analyze the entire volume
and evaluate the results superimposed on the patient’s CT scan.
With OCTAVIUS® 4D, IMRT treatment plan verification is moving into a new dimension.
Fig. 1: Measurements inside the entire phantom volumeSimplified illustration showing measurement positions (blue) obtained with OCTAVIUS 4D
(right) compared to other dosimetry systems which measure either outside the target
volume in the low dose area (left) or far fewer measurement planes (center).
Fig. 2: Detector always perpendicular to the beamUnlike other dosimetry systems where inclined beam vectors result in a varying
angular response of the diodes (left, center), the OCTAVIUS detector always remains
perpendicular to the beam, providing truly isotropic, angle-independent dose
measurements.
OCTAVIUS® 4D: Thousands
of measurement points as
a basis for independent 4D
patient plan verification
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Four simple steps is all it takes.
See how it works.Watch the OCTAVIUS® 4D video on YouTube.
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Calculated DICOM RT dose cube from TPS is imported into VeriSoft.
Sets of transverse, sagittal and coronal planes are extracted for direct comparison to the calculated TPS dose planes in VeriSoft. Measurement results can be superimposed on the patient’s CT image for an improved estimate of the dose delivered to critical structures and organs at risk.
EvaluationQA Device Setup Measurement Calculation
Measurement is started in VeriSoft.
Reading the inclinometer’s output, the motorized OCTAVIUS 4D phantom rotates synchronously with the gantry. The OCTAVIUS detector, which remains aligned perpendicular to the incident beam, measures a dose plane for each gantry angle.
OCTAVIUS 4D system is set up and aligned on patient couch.Inclinometer is attached to vertical part of gantry.
The measured dose plane for each gantry angle is used to determine the dose values along the source-detector rays. To calculate these values, OCTAVIUS 4D applies a proprietary algorithm developed by the DKFZ Heidelberg which is based on PDD curves measured for four different field sizes for the accelerator and energy in use. All dose points measured are then added up, finally obtaining a 3D dose volume with a user-selectable resolution of typically 2 mm.
measured dose plane calculated values along the source-detector rays
Does it agree or not?Discover the powerful dose comparison tools of VeriSoft®.
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Composite or Control Point Analysis
Load the complete measurement for dose comparison or
select gantry angle segments (“control points”) to analyze details.
Slice-by-Slice Analysis
Scroll through the slices to compare the dose at relevant phantom
depths in all three planes (transverse, coronal or sagittal).
NEW
CT Overlay
Failed points, measured isodoses, contours of the CTV, PTV and
organs at risk can be overlaid onto the patient’s CT image to
support you in your evaluation of the accuracy of dose delivery.
3D Volume Analysis
Gain more confidence in the accuracy of your results. The new
3D volume analysis compares the dose measured inside the entire
volume, using multiple parameters and automatically calculating
all slices of the dose cube.
3D Gamma Index Analysis
Using all three spatial dimensions for data comparison, a 3D Gamma
Index analysis may reduce the number of failed points in high dose
gradients. If this method is applied in combination with the local
dose chosen as reference value, it allows you to detect overdosage
in low dose regions which may be overseen when using the maxi-
mum dose level as reference value.
Standard and Advanced Dose Comparison Tools
Select from a wide range of tools – from basic visual comparison
to detailed quantitative evaluation:
}Profile and dose distribution overlays
}Dose-difference distributions
}“Traffic light” display
}Results summary
}Gamma histograms
}Distance-to-agreement calculations
}2D and 3D Gamma index analysis with multiple options
}3D volume analysis
NEW NEW
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Advanced Options
Points selected. Plan verified. Closing the Gap in IMRT QA. When small things matter. 4D in Motion.
Secondary check softwarefor independent dose or MU verification
Key Features
} Clinically established solution for independent verification of
point dose or MU calculations
} Dose comparisons at one or multiple points (field-by-field,
composite)
} Advanced calculation capabilities, e.g., wedge support, correc-
tions of “flash” in breast treatments, fluence/dose mapping
} No LINAC time required for verification
} Multiple treatment techniques supported, including IMRT,
RapidArc®, VMAT
DIAMOND™ DAVID®
In vivo verification of dose delivery during patient treatment
Key Features
}Independent verification and documentation of dose delivery
and MLC accuracy during each patient treatment
}Immediate detection of errors or malfunctions
(e.g., lost MLC positions)
}In vivo measurements not limited to single points
}Wireless operation and data transfer
}Supports conformal, dynamic and rotational IMRT delivery
techniques (RapidArc®, VMAT, IMAT)
Filmless SRS/SBRT patient plan verification
Key Features
}Precise 2D dose verification of small stereotactic fields
up to 10 cm x 10 cm
}Unique flat-panel detector array based on new microLion
detector technology
}977 liquid-filled ionization chambers on a 10 cm x 10 cm field
}Very small detector size (2.3 mm x 2.3 mm x 0.5 mm) with
high spatial resolution (2.5 mm)
}Upgrade to OCTAVIUS 4D (optional)*
OCTAVIUS® 1000 SRS OCTAVIUS® 4D Upgrade
The easiest way to 4D IMRT dosimetry
Key Features
} Budget-friendly solution for users of PTW flat-panel detector
arrays who wish to upgrade to 4D dosimetry
} Package includes: OCTAVIUS 4D phantom, inclinometer,
electronics, VeriSoft upgrade with MEPHYSTO Navigator
} Supported detector arrays: 2D-ARRAY seven29,
OCTAVIUS® Detector 729, OCTAVIUS® Detector 1000SRS *
*available mid-2012
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NEW
OCTAVIUS® Detector 729Detector type: Vented ionization chambers
Detector design: cubic
Number of detectors: 729
Detector size: 0.5 cm x 0.5 cm x 0.5 cm (0.125 cm³)
Detector spacing: 10 mm center-to-center, 5 mm edge-to-edge
Max. field size: 27 cm x 27 cm
Reproducibility: ≤± 0.5%
Dead time: zero
Repetition rate: 200 ms
Measured quantities: absorbed dose to water (Gy), absorbed dose rate to water (Gy/min)
Resolution: 1 mGy or 1 mGy/min
Measurement range: (0.5 ... 45) Gy/min
Reference point: 7.5 mm below the surface of the array
Housing material: GPR
Dimensions: 30 cm x 42 cm x 2.2 cm (W x D x H)
Weight: 5.7 kg
Power supply: (90 ... 265) VAC; (50 ... 60) Hz
PC connection: RS232, Ethernet
Extent of supply: OCTAVIUS® Detector 729, detector interface
OCTAVIUS® 4D Phantom Design: Motorized, cylindrical phantom
Dimensions: diameter 320 mm, length 343 mm
Weight: 29 kg
Angle range: ± 360°
Rotation reproducibility: ± 1°
Material: Polystyrene
Density: 1.05 g/cm³
Extent of supply: Rotation unit with inclinometer, control unit
Technical Specifications
VeriSoft® 5.0 or higherOperating system: Microsoft® Windows® (XP Professional, Vista® Business x32/x64, Windows 7 Professional x32/x64)
Processor: Multi-core processor
Memory (RAM): 2 GB (4 GB recommended)
Hard disk: min. 500 MB of free space for application software and min. 600 MB of free space for .NET Framework 4.0+
Screen resolution: 1280 x 1024 or greater
Interfaces: Network interface
Other: Windows® Internet Explorer® 8.0 or higher, Adobe® Reader® 7.0 or higher
Extent of supply: VeriSoft® software, MEPHYSTO Navigator
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Description 4D dosimetry system for IMRT and IMAT QA
How it works Rotates with the gantry and measures the dose in the entire phantom volume as a function of time or gantry angle
Use Verification of static and dynamic IMRT and IMAT treatment plans
Supported Detectors 2D-ARRAY seven29; OCTAVIUS® Detector 729; OCTAVIUS® Detector 1000SRS 2
Supported ApplicationsPre-treatment – field-by-field nPre-treatment – composite plan nIn vivo
Supported IMRT TechniquesConformal 2D/3D nStep & Shoot nSliding Window nArc IMRT/IMAT (RapidArc®, VMAT) nHelical TomoTherapy® – 1
CyberKnife® – 1
Options DIAMOND™ Secondary Check Software S070020 DAVID® Dose Delivery QA System L981390 OCTAVIUS® Detector 1000SRS L981381 2
OCTAVIUS® 4D Upgrade Package L981324
AccessoriesOCTAVIUS® 4D Trolley T40057 Phantom Chamber Plate Semiflex 0.125 cm³ T40056.1.002 3
Phantom Chamber Plate Farmer T40056.1.003 3
Order No. L981387
n supported optional – currently not supported1 recommended system OCTAVIUS II 2 upgrade available mid-2012 3 Insert plate for cross calibration of detector array against single ionization chamber
Quick Overview
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H e a lt H p H ys i c s n u c l e a r m e d i c i n e d i a g n o s t i c r a d i o l o g y r a d i at i o n t h e r a p y
Dosimetry Pioneers since 1922.
It all started with a brilliant invention – the revolutionary Hammer dosemeter in 1922. Ingenuity coupled with German engineering
know-how shaped the company’s history, leading to innovative dosimetry products that later became an industry standard. Over the
years, PTW has maintained its pioneering spirit, growing into a global market leader of dosimetry applications well known for its
product excellence and innovative strength. Today, PTW dosimetry is one of the first choices for healthcare professionals in radiation
therapy, diagnostic radiology, nuclear medicine and health physics.
For more information on OCTAVIUS IMRT QA Systems and other PTW products, visit www.ptw.de
or contact your local PTW representative:
©PTW. All Rights Reserved. Due to continuous innovation, product specifications are subject to change without prior notice. Printing errors and omissions excepted. OCTAVIUS, DAVID, DIAMOND, and VeriSoft are either registered trademarks or trademarks of PTW or an affiliated company of PTW. All other trademarks mentioned in this document are the property of their respective owners. D 913.139.01/00 2012-03
