MultiMet-WL Cube​

Targeting Accuracy Check for MultiMet SRS

As 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.


“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.”

  • Alice Brain, MSc
  • Senior Clinical Scientist Clatterbridge Cancer Centre


Device Specifications

Dimensions: (cm3)

8.5 x 8.5 x 12.75


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

Compatibility/System Requirements



Cone, MLC, & Jaw Deliveries


Varian Medical Systems® Trilogy™, TrueBeam®, and Edge® Systems


Elekta Versa HD™ and Synergy® Systems


Operating System

Windows 10 Pro 64-bit

TechFlow ​

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