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Radiological Imaging Technology


Machine QA MLC QA Patient QA Imaging QA

MLC QA

Varian MLC

Optimized TG-142 QA for Varian


RIT provides Varian users with a standardized patient file, pre-loaded with treatment plans, covering every TG-142 test that the RIT Family of Products can analyze. Images are automatically sorted and analyzed using a built-in Cerberus script to significantly reduce QA time and lessen the burden of performing routine QA procedures. Results can be quickly and seamlessly submitted to our built-in RITtrenddatabase for tracking, trending, and statistical analysis.


RIT Auto MLC

RIT supplies ready-made picket fence plans for both Millennium and HD MLCs, allowing for fast and accurate automated MLC QA with minimal setup. Complete your MLC QA with the RapidArc® and MLC Leaf Speed routines. Monitor your system’s behavior with powerful process control and statistical analysis tools by submitting your results to the RITtrenddatabase system.

RapidArc® MLC

  • Test 0.1: dMLC Dosimetry
  • Test 0.2: Picket Fence Test vs. Gantry Angle
  • Test 1.1: Picket Fence Test during RapidArc®
  • Test 1.2: Picket Fence Test during RapidArc® with Intentional Errors
  • Test 2: Accurate Control of Dose Rate and Gantry Speed during RapidArc® Delivery
  • Test 3: Accurate Control of Leaf Speed during RapidArc® Delivery

RapidArc® is a registered trademark of Varian Medical Systems, Inc.


Isocenter QA

3D Winston-Lutz (Isocenter Optimization)

Automatically process a set of EPID Winston-Lutz images to give a fast, accurate measurement of isocenter position. RIT’s version of this classic test allows you to use 3-12 images, not only giving you an accurate measurement of isocenter displacement, but also an error estimate determining the wobble around the isocenter and any ball setup error.

Eliminate your need for films, and increase your accuracy by using the all patented Virtual Starshot, reconstructed using a set of Winston-Lutz images!

Patents: US 9192784, JP 6009705, CA 2918045, and other international patents pending.



Imaging Tests

Catphan® 504 & 604 For Varian OBI

RIT’s Catphan® analysis has been carefully designed to provide automated CBCT QA for the Varian OBI.
Analyze all relevant slices of the Catphan® 504 or 604 in one easy step, and quickly get comprehensive reports for:

  • HU Constancy and linearity
  • Geometric Accuracy
  • Slice thickness
  • Spatial Resolution
  • Uniformity and noise

 

Catphan® is a registered trademark of The Phantom Laboratory.

Planar MV (EPID) Imaging

The RIT EPID phantom is designed to provide quality EPID image QA, performing all tests recommended in TG-142. Results are accurate and consistent, and implementation is easy. Quickly perform measurements of resolution, contrast, noise, uniformity, and geometric scaling, all in a single image. RIT software also supports the Las Vegas, QC3, and PTW EPID phantoms.

Planar kV Imaging

RIT software is designed to support vendor-supplied phantoms for planar kV imaging. Using your Leeds TOR-18 FG phantom, supplied by Varian, you can quickly and easily meet all TG-142 recommendations for planar kV imaging QA in a single exposure. Results are consistent, quantitative, and repeatable, and can easily be tracked in RITtrend™.

IGRT / kV-MV Coincidence

Perform precision IGRT daily QA with ISOCube™ phantom and RIT software. Quickly and quantitatively perform positioning-repositioning, laser alignment, field size checks, kV and MV coincidence measurements, CBCT isocenter coincidence, ODI accuracy, and the 6 Degree-of-Freedom couch test.
ISOCube™ is a trademark of IMT, Inc.


Other TG-142 Relevant Tests

Bayouth MLC Test

Analyzes MLCs that require leaf gaps between banks.

 

Radiation vs. Light Field Alignment

Perform quick easy EPID based radiation vs. light field alignment with RIT L-Rad Phantom. Fiducial markings for 5x5 cm, 10x10 cm, 15x15 cm, and 20x20 cm allow for a wide range of testing.

 

Beam Profiles

Quick and easy measurements for star shots, flatness and symmetry, FWHM, penumbras, depth-dose curves, and more.

Elekta MLC

Elekta Leaf Speed Analysis

Elekta Leaf Speed Analysis

RIT’s latest upgrade offers enhanced MLC QA for Elekta machines, allowing for fast and accurate automated analysis, with minimal setup.

 

  • The new Leaf Speed Analysis routine measures the consistency and accuracy of the MLC leaf speeds as they traverse the imager.
     
  • All measurements are made on your EPID, just like your treatment deliveries. Log files are not used, allowing for universal access.

Isocenter QA

3D Winston-Lutz (Isocenter Optimization)

The RIT Family of Products come equipped with an automated 3D Stereotactic Alignment routine, giving you a fast and accurate measurement of isocenter accuracy.  Using only a set of EPID Winston-Lutz images, the RIT system will calculate deviations between radiation and mechanical isocenter, determine ball/BB setup error and suggest couch alignment adjustments to optimize your system’s accuracy.  Additionally, this routine enables individual component (gantry, collimator, couch) characterization to better understand distinct contributions to isocenter deviation, giving insight into adjustments that can be made to improve delivery performance, if needed.

Eliminate your need for films and increase your accuracy using Virtual Star Shot* with ANY combination of angles, reconstructed using a set of Winston-Lutz images in it’s new, dedicated window!

*Patents: US 9192784, JP 6009705, CA 2918045, and other international patents pending.


Hancock Test (Leaf and Jaw Positional Accuracy)


MLC and Jaw QA

The Hancock Test makes MLC and Jaw QA simple for Elekta machines. The test follows a simple image acquisition procedure on the iViewGT™ system, with automatic processing and reporting by RIT. This test has versions specifically-formatted for the Agility™ MLC head and the MLCi2 head. The Hancock Test encompasses several mechanical tests, including MLC position accuracy, jaw position accuracy, and takes into consideration iViewGT™ imager position movement and collimator rotation isocenter walkout. The Hancock Test results can be used as input data for adjusting the MLC and jaw calibration in the Elekta TCS (Treatment Control System). The RIT Hancock Test is the only system that meets the TG-142 requirement to measure backup jaw position relative to leaf position. The RIT system easily and seamlessly supports JPEG and HIS images from iViewGT™.

Track your results in the RITtrend™ database, or export them to PDF or Excel formats.

iViewGT™ and Agility™ are trademarks of Elekta, AB.


Imaging Tests

Catphan® 503 for Elekta

RIT’s Catphan® analysis has been carefully designed to work with images from Elekta’s XVI system and to provide test results equivalent to Elekta’s Customer Acceptance Tests for:

  • Low Contrast Visibility
  • Resolution
  • Uniformity

Catphan® is a registered trademark of The Phantom Laboratory.

Planar MV (EPID) Imaging

The RIT EPID Phantom is designed to provide quality EPID image QA, performing all tests recommended in TG-142. Results are accurate and consistent, and implementation is easy. Quickly perform measurements of resolution, contrast, noise, uniformity, and geometric scaling, all in one single image. RIT software also supports the Las Vegas, QC3, and PTW EPID phantoms.

Planar kV Imaging

RIT software is designed to support vendor-supplied phantoms for planar kV imaging. Using your Leeds TOR-18 FG phantom supplied by Elekta, you can quickly and easily meet all TG-142 recommendations for planar kV imaging QA in one exposure. Results are consistent, quantitative, and repeatable, and can easily be tracked in RITtrend™.

IGRT / kV-MV Coincidence

Perform precision IGRT daily QA with the ISOCube™ phantom and RIT software. Quickly and quantitatively perform positioning-repositioning, laser alignment, field size checks, kV and MV coincidence measurements, CBCT isocenter coincidence, ODI accuracy, and the 6 Degree-of-Freedom couch test. Analysis of Penta-Guide phantom is now also supported for kV/MV/CBCT image coincidence.

ISOCube™ is a trademark of IMT, Inc.


Other TG-142 Relevant Tests

Bayouth MLC Test

  • Analyzes MLCs that require leaf gaps between banks.

 

Radiation vs. Light Field Alignment

  • Perform quick easy EPID based radiation vs. light field alignment with RIT L-Rad phantom. Fiducial markings for 5x5 cm, 10x10 cm, 15x15 cm, and 20x20 cm allow for a wide range of testing.

 

Beam Profiles

  • Quick and easy measurements for star shots, flatness and symmetry, FWHM, penumbras, depth-dose curves, and more.

Other MLC QA Options


RIT software automatically analyzes the 9 Varian dMLC test patterns to determine proper MLC operation. Quantitative results and Pass/Fail results are reported. These tests evaluate positional accuracy of the leaves, kinetic properties (including leaf speed stability), leaf acceleration, and fractional dose delivery. This method utilizes test patterns for step-and-shoot and sliding window techniques.

 

Picket Fence

  • Support for Varian 40X40 EPID for both Millenium 120 and Millenium 120 HD MLC.
  • RIT software also analyzes Leaf Transmission according to TG-50.




RIT Products For MLC QA


All of RIT’s therapy products
in one convenient and
comprehensive package


The original RIT product,
combining patient and
machine QA


All of the machine and
imaging tests for TG-142 in a
'just-what-you-need' package

A comprehensive
test suite for CyberKnife®
and all robotic radiosurgery