Purpose Electronic portal imaging devices (EPIDs) have been widely utilized for patient‐
specific quality assurance (PSQA) and their use for transit dosimetry applications is …

Purpose: This study (1) examines a variety of real‐world cases where systematic errors were
not detected by widely accepted methods for IMRT/VMAT dosimetric accuracy evaluation …

Purpose: Electronic Portal Imaging Devices (EPIDs) have been widely utilized for Patient-
Specific QA (PSQA) and their use for transit dosimetry applications is emerging. Yet there …

Purpose: Radiation treatments are trending toward delivering higher doses per fraction
under stereotactic radiosurgery and hypofractionated treatment regimens. There is a need …

Background Intra-fraction motion represents a crucial issue in the era of precise
radiotherapy in several settings, including breast irradiation. To date, only few data exist on …

The dosimetric consequences of errors in patient setup or beam delivery and anatomical
changes are not readily known. A new product, Per FRACTION (Sun Nuclear Corporation) …

Although much literature has been devoted to portal dosimetry with the Varian amorphous
silicon (aSi) portal imager, the majority of the described methods are not routinely adopted …

In this project, we investigated the use of an electronic portal imaging device (EPID),
together with the treatment planning system (TPS) and MLC log files, to determine the …

Background In modern radiotherapy, it is crucial to monitor the performance of all linac
components including gantry, collimation system and electronic portal imaging device …

Purpose: Pretreatment verification of volumetric modulated arc therapy (VMAT) dose
delivery with electronic portal imaging device (EPID) uses images integrated over the entire …