Purpose: In advanced radiotherapy treatments such as intensity modulated radiation therapy
(IMRT) and volumetric modulated arc therapy (VMAT), verification of the performance of the …

Purpose: Electronic portal imaging devices (EPIDs) have been studied and used for
pretreatment and in‐vivo dosimetry applications for many years. The application of EPIDs for …

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

Abstract Machine Performance Check (MPC) is an automated and integrated image‐based
tool for verification of beam and geometric performance of the TrueBeam linac. The aims of …

Purpose Recently the use of linear accelerator (linac)‐based stereotactic radiosurgery
(SRS) has increased, including single‐isocenter multiple‐target SRS. The workload of …

In Winston‐Lutz (WL) tests, the isocenter of a linear accelerator (linac) is determined as the
intersection of radiation central axes (CAX) from multiple gantry, collimator, and couch …

Proper quality assurance (QA) of the radiotherapy process can be time‐consuming and
expensive. Many QA efforts, such as data export and import, are inefficient when done by …

Purpose: Gantry sag is one of the well‐known sources of mechanical imperfections that
compromise the spatial accuracy of radiation dose delivery. The objectives of this study were …

Objective: In radiotherapy treatments, it is crucial to monitor the performance of linear
accelerator (linac) components, including gantry, collimation system and electronic portal …

A virtual EPID standard phantom audit (VESPA) has been implemented for remote auditing
in support of facility credentialing for clinical trials using IMRT and VMAT. VESPA is based …