Characterization of GafchromicTM EBT4 film with clinical kV/MV photons and MeV electrons

Abstract

A newly developed GafchromicTM EBT4 film model was released recently. According to the vendor‐stated specifications, this new model maintains major features of its more recent predecessor, EBT3, but has a great improvement in the signal‐to‐noise ratio (SNR). The purpose of this study was to fully characterize the EBT4 model by testing its dose response dependence on beam energy using clinical photon and electron beams and validating its improvement in SNR.