A simple yet powerful daily QA test to verify IGRT setup accuracy The QUASAR™ IsoCenter Cube is designed to implement a modified Winston-Lutz test for IGRT accuracy required for optimal treatment delivery. This system is also used for TG-142 quality assurance compliance for isocenter and laser alignment tests. End-to-end positioning accuracy from planning CT to clinical IGRT treatment setup is achieved with 0.1 mm precision and is accomplished in minutes. The test is performed by aligning the QUASAR™ IsoCenter Cube Phantom using the cross-hairs etched on each side with your IGRT system, Compatible with TG142 tests Check various beam shaping devices Analyze EPID radiation field exposures Quick and simple Winston-Lutz testing for IGRT accuracy Report left/right, superior/inferior and anterior/posterior errors at configurable gantry, collimator and table angles then capturing radiation field exposures with film or EPID. The test results are used to determine end-to-end accuracy for frameless SRS, SBRT, and IGRT treatments. The QUASAR™ IsoCenter Cube Phantom features a seamless acrylic 5 x 5 x 5 cm unibody enclosure containing one 6 mm diameter Tungsten Sphere located at the central axis of the main cross-hairs and used for measuring isocenter accuracy. Displayed on 3 faces are 3 mm offset laser alignment marks, which are used for couch position accuracy. Test end-to-end IGRT positioning accuracy for clinical treatment setups with 0.1 mm precision in less than 5 minutes. Perform test by aligning the phantom containing radiopaque sphere with IGRT system, then capturing radiation field exposures with film or EPID Use the test results to determine end-to-end accuracy for frameless SRS, SBRT, and IGRT treatments Above: The acrylic 5 x 5 x 5 cm QUASAR™ IsoCenter Cube Phantom used for measuring i

WINSTON-LUTZ ANALYSIS SOFTWARE Analyze EPID radiation field exposures with the automated Analysis Software. Check various beam shaping devices, report left/right, superior/ inferior and anterior/posterior errors at configurable gantry, collimator and table angles. Ability to test IGRT accuracy with a minimum of two gantry angle images. The user sets the warning and fail levels, and can visually see pass (green), warning (yellow), and fail (red) results. Above: Screenshot of the QUASAR™ IsoCenter Cube analysis software displaying pass (green) results Above: Screenshot of the QUASAR™ IsoCenter...