IMRT 2018

S"IMRT'vs'VMAT'vs'Helical Tomotherapy

• S"IMRT'and'Single"arc'make'a'compromise: S"IMRT:' very%coarse sampling'of'the'gantry'angle,' but'with'a' full%intensity%modulation from'each' angle Single"arc:' all angles,'but' without or'with'a' small% modulation'at'each'angle

• HT'allows' full%intensity%modulation for' each% beam%direction .'Much'greater'flexibility'of' shaping'the'dose'distribution'in'transverse' slices