Physics Bucharest 2017

6/3/2017

IMRT fields = 2D modulation

Could (potentially) consider each leaf pair separately

Preferable to consider 2D matrix and group leaves – maximise segment area – minimise number of segments

ESTRO physics course 2017

73

IMRT delivery methods

Dynamic  More versatile - more intensity levels

 Faster overall treatment time - beam stays on  Smooth transition - but depends on leaf speed  MU efficiency lower  Gantry rotation

 VMAT/ RapidArc

ESTRO physics course 2017

74