Results 21 to 30 of about 3,312 (171)
Investigating the electronic portal imaging device for small radiation field measurements
Journal of Medical Physics, 2017 Purpose: With the advent of state-of-the-art treatment technologies, the use of small fields has increased, and dosimetry in small fields is highly challenging.
Arpita Agarwal +5 more
doaj +1 more source
Planar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA
Life, 2021 The study’s purpose was to develop and validate Electronic Portal Imaging Device (EPID)-based dosimetry for Stereotactic Radiosurgery (SRS) and Stereotactic Radiation Therapy (SRT) patient-specific Quality Assurance (QA).
Sangutid Thongsawad +3 more
doaj +1 more source
Radiation Oncology, 2018 Background The demand for dose verification during treatment has risen with the increasing use of intensity-modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) in modern radiation therapy.
So-Yeon Park +4 more
doaj +1 more source
A Large Area Pixelated Silicon Array Detector for Independent Transit In Vivo Dosimetry
Applied Sciences, 2022 A large area pixelated silicon array detector named “MP987” has been developed for in vivo dosimetry. The detector was developed to overcome the non-water equivalent response of EPID (Electronic Portal Imaging Device) dosimetry systems, due to the ...
Owen J. Brace +9 more
doaj +1 more source
Evaluation of Daily CT for EPID-Based Transit In Vivo Dosimetry
Frontiers in Oncology, 2021 PurposeThe difference in anatomical structure and positioning between planning and treatment may lead to bias in electronic portal image device (EPID)-based in vivo dosimetry calculations. The purpose of this study was to use daily CT instead of planning
Bin Feng +20 more
doaj +1 more source
Brazilian Journal of Radiation Sciences, 2017 The aim of this work was to implement a simple algorithm to evaluate isocenter dose in a phantom using the back-projected transmitted dose acquired using an Electronic Portal Imaging Device (EPID) available in a Varian Trilogy accelerator with two ...
Thiago Bernardino da Silveira +2 more
doaj +1 more source
Software tool for portal dosimetry research
Australasian Physics & Engineering Sciences in Medicine, 2008 This paper describes a software tool developed for research into the use of an electronic portal imaging device (EPID) to verify dose for intensity modulated radiation therapy (IMRT) beams. A portal dose image prediction (PDIP) model that predicts the EPID response to IMRT beams has been implemented into a commercially available treatment planning ...
Vial, P. +4 more
openaire +3 more sources
Physics and Imaging in Radiation Oncology, 2019 Electronic portal imaging device-based in vivo dosimetry with a commercial product was performed for 10 prostate cancer patients treated with an air-filled endorectal balloon.
Bo Sterckx +2 more
doaj +1 more source
Monte Carlo portal dosimetry [PDF]
Medical Physics, 2005 This project developed a solution for verifying external photon beam radiotherapy. The solution is based on a calibration chain for deriving portal dose maps from acquired portal images, and a calculation framework for predicting portal dose maps.
openaire +1 more source
Adaptive Radiotherapy (ART) Using In Vivo Portal Dosimetry Constancy on Halcyon LINAC for Head and Neck Cancer VMAT [PDF]
Iranian Journal of Medical PhysicsIntroduction: This study evaluated the potential of the Varian Halcyon LINAC and its associated Portal Dosimetry (PD) software, using in vivo megavoltage portal images, as a tool for in vivo portal dosimetry constancy (IVDc) in head and neck cancer (HNC)
Venugopal Sundaram +8 more
doaj +1 more source