Results 1 to 10 of about 7,705 (226)

Development of an Electronic Portal Imaging Device Dosimetry Method [PDF]

Diagnostics, 2021
Support arm backscatter and off-axis effects of an electronic portal imaging device (EPID) are challenging for radiotherapy quality assurance. Aiming at the issue, we proposed a simple yet effective method with correction matrices to rectify backscatter ...
Jun Zhang, Ziting Fan, Xile Zhang, Ruijie Yang, Junhai Wen   +4 more
doaj   +7 more sources

Setup in a clinical workflow and impact on radiotherapy routine of an in vivo dosimetry procedure with an electronic portal imaging device. [PDF]

PLoS ONE, 2018
High conformal techniques such as intensity-modulated radiation therapy and volumetric-modulated arc therapy are widely used in overloaded radiotherapy departments.
Jie Li, Angelo Piermattei, Pei Wang, Shengwei Kang, Mingyong Xiao, Bin Tang, Xiongfei Liao, Xin Xin, Mattia Grusio, Lucia Clara Orlandini   +9 more
doaj   +4 more sources

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, Nikhil Rastogi, K J Maria Das, S A Yoganathan, D Udayakumar, Shaleen Kumar   +5 more
doaj   +4 more sources

The fast calibration model for dosimetry with an electronic portal imaging device. [PDF]

J Appl Clin Med Phys, 2022
AbstractPurposeThe aim of this study was to develop an algorithm that corrects the image of an electronic portal imaging device (EPID) of a linear accelerator so that it can be used for dosimetric purposes, such as in vivo dosimetry or quality assurance for photon radiotherapy.
Schade S, Engenhart-Cabillic R, Zink K, Czarnecki D.   +3 more
europepmc   +3 more sources

Clinical Efficacy of an Electronic Portal Imaging Device versus a Physical Phantom Tool for Patient-Specific Quality Assurance [PDF]

Life, 2022
Pre-treatment patient-specific quality assurance (QA) is critical to prevent radiation accidents. The electronic portal imaging device (EPID) is a dose measurement tool with good resolution and a low volume-averaging effect.
Seung-Hyeop Baek, Sang-Hyoun Choi, Moo-Jae Han, Gyu-Seok Cho, Wonil Jang, Jin-Sung Kim, Kum-Bae Kim   +6 more
doaj   +2 more sources

A method for in vivo treatment verification of IMRT and VMAT based on electronic portal imaging device [PDF]

Radiation Oncology, 2021
Background Intensity-modulated radiation therapy (IMRT) and volume-modulated arc therapy (VMAT) are rather complex treatment techniques and require patient-specific quality assurance procedures.
Jun Zhang, Xiuqing Li, Miaomiao Lu, Qilin Zhang, Xile Zhang, Ruijie Yang, Maria F. Chan, Junhai Wen   +7 more
doaj   +2 more sources

Improving patient treatment accuracy using transit dosimetry with Electronic Portal Imaging Device images and deep learning [PDF]

Physics and Imaging in Radiation Oncology
Background and Purpose:: Electronic portal imaging devices (EPID) can be utilized for transit in vivo dosimetry (IVD). A major limitation of standard amorphous Silicon EPID detectors for usage IVD is their non-linear detector response to water equivalent
Lorenzo Marini, Carlotta Mozzi, Michele Avanzo, Francesca Lizzi, Icro Meattini, Giovanni Pirrone, Alessandra Retico, Emmanuel Uwitonze, Aafke Christine Kraan, Cinzia Talamonti   +9 more
doaj   +2 more sources

Evaluation of Perkin Elmer Amorphous Silicon Electronic Portal Imaging Device for Small Photon Field Dosimetry [PDF]

Journal of Biomedical Physics and Engineering
Background: Electronic portal imaging devices (EPIDs) are applied to measure the dose and verify patients’ position.Objective: The present study aims to evaluate the performance of EPID for measuring dosimetric parameters in small photon fields.Material ...
Mohammad Haghparast, Wrya Parwaie, Mohsen Bakhshandeh, Nina Tuncel, Seied Rabi Mahdavi   +4 more
doaj   +2 more sources

Evaluation of Dose Distribution at the Level of Electronic Portal Imaging Device using Treatment Planning System [PDF]

Journal of Biomedical Physics and Engineering
Background: Treatment Planning Systems (TPS) are designed to calculate dose distributions within the CT imaging field of view. However, the Electronic Portal Imaging Device (EPID) is positioned outside this area, making it challenging to use standard TPS
Amene Bagheri, Mehdi Momennezhad, Shahrokh Nasseri, Azam Eskandari, Erfan Saatchian, Maryam Naji, Mohammad Yasin Mohammadi   +6 more
doaj   +2 more sources

Assessment of using electronic portal imaging device for analysing bolus material utilised in radiation therapy

Open Chemistry, 2022
In this study, the feasibility of using electronic portal imaging device (EPID) as an analysing equipment for bolus material was evaluated in terms of its dosimetric parameters.
Özseven Alper
doaj   +2 more sources