IMRT 2017

The graph provides the information of penumbra ranges in water across a collimating edge for different beam energies, specified by their quality index TPR20/10, and serves to set the dimensions of when small field conditions apply based on overlapping electron distribution zones from different field edges . (Nyholm et al . 2006) IMRT CONCERNS ON SMALL FIELD DOSIMETRY AND BEAM MODELLING

( Das et al ., Med Phys. 2008 )