Results 31 to 40 of about 4,830 (200)
An Empirical Transmitted EPID Dosimetry Method using a Back-Projection Algorithm [PDF]
Journal of Biomedical Physics and Engineering, 2019 Background: The present study aimed to introduce a rapid transmission dosimetry through an electronic portal-imaging device (EPID) to achieve two-dimensional (2D) dose distribution for homogenous environments. Material and Methods: In this Phantom study,
S M Hashemi +8 more
doaj +1 more source
Portal Dosimetry as a patient specific Quality Assurance tool for Volumetric Arc Radiotherapy [PDF]
, 2021 Introduction: Volumetric Arc Radiotherapy (VMAT) is an advanced technique. Calculations of VMAT plans are not so accurate even with State-of-Art dose calculation algorithms due to their complexity.
Dr. M. Kerketta +9 more
core +2 more sources
Evaluation of electronic imaging device portal \"Portal Dosimetry\" in quality control in intensity modulated radiotherapy [PDF]
, 2010 No presente trabalho serão apresentados testes de comissionamento e de avaliação da utilização do portal dosimetry, da Varian, no controle de qualidade dos planejamentos de radioterapia de intensidade modulada.
Érika Yumi Watanabe +1 more
core +1 more source
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
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
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