IMRT 2017

FRAMELESS • End to end process over a hidden target test (radiopaque sphere, Ø 5 mm) provided by BrainLAB to evaluate the accuracy of IGRT positioning system . • Irradiation with a conical collimator (Ø 7,5 mm) • Gantry 0º & 90º • The center to center deviations are below 0.7 ± 0.3