Machine QA SolutionsAs clinics move toward single-isocenter multiple-met SRS treatments, more stringent off-axis QA is needed. The MultiMet-WL Cube efficiently measures targets up to 7 cm off-axis within 0.1 mm accuracy.
Six Isocenters for MultiMet QA
The MultiMet-WL Cube uses six targets set at precise locations from isocenter to measure off-axis and rotational gantry, collimator, and couch errors.
Off-Axis WL Tests, Fast
Complete six off-axis Winston-Lutz tests in the time it would normally take to complete just one. Automated software and an optimized RT plan enable fast and clinically useful analysis of the combined W/L results.
Versatile Small-Field Tool
Use as a standalone phantom or combine with the StereoPHAN™ and SRS MapCHECK® for an end-to-end stereotactic QA program.
Learn how the MultiMet-WL Cube can advance your SRS program.
“The MultiMet Winston Lutz cube is a very useful tool in our stereotactic treatment pathway, arguably our most complex treatment technique. During commissioning on our second radiosurgery linac, it helped diagnose a genuine couch fault at an extreme angle. The MultiMet-WL gives us real confidence in our off-axis treatment deliveries. We use it without fail before every stereotactic treatment.”
Senior Clinical Scientist Clatterbridge Cancer Centre
Off-axis Winston-Lutz tests analyzed in software to determine targeting errors.
Six targets enable quantifying the margin of error up to 7 cm off-axis
Software indicates Isocenter offsets on a dimensional plane.
Software includes the RT plan, transfers the image, and analyzes for setup errors, including magnitude and source of error (gantry, couch, or collimator in 6 degrees of freedom).
Resources
Publications
- Detection of rotational errors in single-isocenter multiple-target radiosurgery: Is a routine off-axis Winston–Lutz test necessary?
- Re-examining TG-142 recommendations in light of modern techniques for linear accelerator based radiosurgery
- Development of a Phantom to Verify Targeting Accuracy of Single-Isocenter Multiple Lesion Stereotactic Radiosurgery
- Stereotactic QA: saving time, delivering outcomes
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Webinars & Videos
- MultiMet Winston-Lutz Cube: A Centre's Experience
- Critical Components of a Stereotactic Radiosurgery/Radiotherapy Program (AAPM 2020 Presentation)
- Simplifying Stereotactic Treatment QA
- SRS End-to-End Testing with a High Density Diode Array and Multi-Met WL Phantom
- MultiMet-WL Cube Overview Video
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Specifications
Dimensions: (cm3) |
8.5 x 8.5 x 12.75 |
Targets |
6 (5 mm diameter) tungsten targets in specified locations |
Target to Cross-Hair Tolerance |
± 0.1 mm |
Target Material |
Tungsten Carbide |
Quantifiable Off-Axis Accuracy Range |
Up to 7 cm |
StereoPHAN™ |
Yes |
Cone, MLC, & Jaw Deliveries |
Yes |
Varian Medical Systems® Trilogy™, TrueBeam®, and Edge® Systems |
Yes |
Elekta Versa HD™ and Synergy® Systems |
Yes |
Operating System |
Windows 10 Pro 64-bit |
Imager Minimum Required Pixel Pitch |
≤0.50 mm |
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