IMRT 2017

These dosimetric challenges are, • the lack of lateral charged particle equilibrium (CPE) • the partial occlusion of the primary source due to overlapping penumbra from opposing collimating borders. • variations of electron spectrum inducing changes in stopping power ratios. IMRT CONCERNS ON SMALL FIELD DOSIMETRY AND BEAM MODELLING

( Das et al ., Med Phys. 2008 )