IMRT

Accuracy frameless system: Methods

l Frameless versus frame-based system? g Phantom study g Hidden target test: “end to end” test Ø Overall treatment accuracy Ø Phantom from CT – Treatment Planning – Irradiation Ø Target: BB

Ø 10 mm circular treatment beam @ 0 and 270° gantry Ø Center of projected image of BB with respect of treatment field

34