SU‐FF‐T‐293: Modeling An ASi Portal Imager Response Using a Commercial Treatment Planning Software

Purpose: Quality assurance (QA) for intensity modulated radiation therapy (IMRT) plans is substantially more complex and time consuming than for conventional plans. Electronic portal imaging devices (EPIDs) can be employed to improve the efficiency of the QA process. The major objective of this work was to model the EPID as a machine, which is used to calculate the planar dose from an IMRT field. This planar dose can be compared directly to the …