IMRT 2018

VMAT Machine Quality Control

• Three tests have been proposed • Picket Fence test (also used for IMRT) • Secure correct MLC position • Dose rate versus gantry speed: DRGS • • Dose rate versus MLC leaf speed: DRMLC • Secure correct MLC speed • Measurement: • Film or EPID Secure correct gantry speed and doserate

Ling IJBOP 72,2008 Commissioning and quality assurance of rapidarc radiotherapy delivery system