Characterization of EPID software for VMAT transit dosimetry.Dosimetry check (DC) is a commercial software that allows reconstruction of 3D dose distributions using transit electronic portal imaging device (EPID) images. 
EPID
In this work, we evaluated the suitability of DC software for volumetric modulated arc therapy (VMAT) transit dosimetry. 
DC software
The volumetric gamma agreement index 3%/3 mm between twenty VMAT dose distributions reconstructed by DC and calculated with treatment planning system (TPS) were compared to those obtained using PTW OCTAVIUS®4D to assess DC accuracy in VMAT quality assurance (QA). 
PTW OCTAVIUS