Purpose To characterize the stacked and staggered dual‐layer multileaf collimator (MLC) on
the Halcyon TM system. Methods The novel MLC assembly was reviewed and compared to …

The introduction of MR-guided treatment machines into the radiation oncology clinic has
provided unique challenges for the radiotherapy QA program. These MR-linac systems …

MR-Guided Radiation Therapy (MRIgRT) has been made possible only due to the ingenuity
and commitment of commercial radiation therapy system vendors. Unlike conventional linear …

Purpose Purpose of this study is to evaluate plan quality on the MRIdian (Viewray Inc.,
Oakwood Village, OH, USA) system for head and neck cancer (HNC) through comparison of …

Introduction Our institution was the first in the world to clinically implement MR-guided
adaptive radiotherapy (MRgART) in 2014. In 2021, we installed a CT-guided adaptive …

Purpose To present lessons learned from magnetic resonance imaging (MRI) quality control
(QC) tests for low‐field MRI‐guided radiation therapy (MR‐IGRT) systems. Methods MRI QC …

Objective. A comparison of percent depth dose (PDD) curves, lateral beam profiles, output
factors (OFs), multileaf collimator (MLC) leakage, and couch transmission factors was …

The first cancer patients irradiated with cobalt-60 gamma rays using external beam
radiotherapy occurred in 1951. The development of cobalt-60 machines represented a …

Purpose The purpose of this study was to evaluate the performance of a multileaf collimator
(MLC) system for the high magnetic field of the Elekta Unity magnetic resonance linear …

The first magnetic resonance (MR)-guided radiotherapy system in Japan was installed in
May 2017. Implementation of online MR-guided adaptive radiotherapy (MRgART) began in …