Evaluation of MLC Thickness and Composite Effects on Collimation Parameters using EGSnrc and IAEA Phase Space Data

Hadad, Alipour, K Hadad
Introduction M LCs have become important tools in LINAC collimation systems. The main concern in the use of MLCs for stationary fields is the conformity between planed boundary as well as reduction in setup and treatment times [1]. MLCs are considered as an essential tool for intensity modulated radiation therapy (IMRT) which is becoming the standard of care in radiation oncology facilities. All linear accelerator makers have provided some kinds of MLC for conformal and IMRT treatments. The MLC
more » ... treatments. The MLC characteristics for each manufacturer have been studied by many researchers [2], and comparative physical characteristics are reported in AAPM report [3]. Dosimetric parameters, affected when using MLC in IMRT, have been Original ABSTRACT Background: Recently, multileaf collimators (MLC) have become an important