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.
“We suggest a careful review by the clinical physicist of routine quality assurance tolerances for angular mechanical checks when using multifocal VMAT for metastatic disease…the stricter angular tolerance may necessitate a new method of measurement.”
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
Webinars & Videos
- AAPM 2020 Presentation: Critical Components of a Stereotactic Radiosurgery/Radiotherapy Program
- Simplifying Stereotactic Treatment QA
- SRS End-to-End Testing with a High Density Diode Array and Multi-Met WL Phantom
- Simplifying Stereotactic Treatment QA: Single Isocenter Multi-Mets
- MultiMet-WL Cube Overview Video
- MoreLess
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 |
