Quality assurance of complex radiotherapy treatments using high-resolution 2D dosimeters

The study investigates various components of the quality assurance (QA) processes for complex modern day radiotherapy treatments with a focus on the use of high resolution 2D dosimeters. Pre-treatment QA using a rotating 2D array on an O-ring linac, the use of radiochromic film for in-vivo dosimetry, a novel smartphone dosimetry system, a novel technique to increase fiducial visualisation during MV based intra-fraction monitoring, and use of Varian Portal Dosimetry to detect inter-fraction anatomical changes were all investigated and are discussed.