External beam radiotherapy with photon beams is a highly accurate treatment modality, but
requires extensive quality assurance programs to confirm that radiation therapy will be or …

The objective of this paper is to provide a comprehensive review of the advancements and
techniques in real time two-dimensional (2D) dosimetry for external radiation therapy with …

Historically, several different electronic technologies have been utilized to replace the role of
radiographic films in capturing the images, including the scanning liquid ionization chamber …

Beam output checks of a commercial high-field magnetic resonance-guided radiotherapy
machine can be performed with its on-board megavoltage imager (MVI). This is a fast and …

Abstract Background and Purpose Electronic portal imaging devices (EPIDs) can be used to
reconstruct dose inside a virtual phantom. This work aims to study the feasibility of using this …

Patient‐specific quality assurance for intensity‐modulated radiation therapy (IMRT) dose
verification is essential. The aim of this study is to provide a new method based on the …

Background Dose distributions calculated with electronic portal imaging device (EPID)‐
based in vivo dosimetry (EIVD) differ from planned dose distributions due to generic and …

A fundamental parameter to evaluate the beam delivery precision and stability on a clinical
linear accelerator (linac) is the focal spot position (FSP) measured relative to the collimator …

We characterized the on-board megavoltage imager (MVI) of a magnetic resonance-guided
radiotherapy machine for beam output checks. Linearity and repeatability of its dose …

Purpose AG eant 4 model of a novel, water-equivalent electronic portal imaging device
(EPID) prototype for radiotherapy imaging and dosimetry utilising an array of plastic …