Results 21 to 30 of about 7,215 (155)

Presentation of a New Averaging Method for Improvement of Systematic and Random Errors in Radiotherapy of Chest and Abdomen Cancer Using Electronic Portal Imaging Device [PDF]

Journal of Medical Signals and Sensors
Background: This study aims to introduce and evaluate a new averaging method to decrease systematic and random errors using an electronic portal imaging device (EPID) in radiotherapy of chest and abdomen cancers.
Mohammad Reza Asgari, Mahdi Ghorbani, Mehdi Khosravi, Ahmad Shakeri, Mohamad Pursamimi, Meysam Tavakoli   +5 more
doaj   +2 more sources

In-vivo dosimetry using electronic portal imaging in online-adaptive radiotherapy for rectal cancer [PDF]

Physics and Imaging in Radiation Oncology
Background and purpose: Electronic portal imaging device (EPID)-based in-vivo dosimetry (IVD) is widely used to verify radiotherapy dose delivery and detect deviations from anatomical changes, setup uncertainties, or machine-related errors. However, cone-
Gary Razinskas, Robert Schindhelm, Anne Richter, Johannes Kraft, Marcus Zimmermann, Jörg Tamihardja, Andrea Wittig-Sauerwein, Sonja Wegener   +7 more
doaj   +2 more sources

Investigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device [PDF]

Medical Devices: Evidence and Research, 2015
Pejman Rowshanfarzad,1 Peter Häring,2 Hans L Riis,3 Sune J Zimmermann,3 Martin A Ebert1,4 1School of Physics, The University of Western Australia, Crawley, WA, Australia; 2German Cancer Research Center (DKFZ), Medical Physics in Radiation Oncology ...
Rowshanfarzad P, Häring P, Riis HL, Zimmermann SJ, Ebert MA   +4 more
doaj   +2 more sources

Evaluation of EPID-Based Transmission and DLG Correction Methods for Dosimetric Verification in HyperArc Single-Isocenter Multiple Target Radiosurgery [PDF]

Diagnostics
Background/Objectives: Accurate verification of single-isocenter multiple-target (SIMT) stereotactic radiosurgery is challenging owing to the complexity of multi-lesion delivery and the sensitivity of stereotactic dose gradients. We aimed to evaluate the
Se An Oh, Sung Yeop Kim, Jae Won Park, Ji Woon Yea, Jaehyeon Park, Yoon Young Jo   +5 more
doaj   +2 more sources

Clinical performance of FractionLab in patient-specific quality assurance for intensity-modulated radiotherapy: a retrospective study [PDF]

Journal of Yeungnam Medical Science, 2022
Background This study was aimed at comparing and analyzing the results of FractionLab (Varian/Mobius Medical System) with those of portal dosimetry that uses an electronic portal imaging device.
Se An Oh, Sung Yeop Kim, Jaehyeon Park, Jae Won Park, Ji Woon Yea   +4 more
doaj   +1 more source

Development of Artificial Intelligence as a Conversion Tool for Cine Electronic Portal Imaging Device Images to Radiotherapy Dosimetry: Preliminary Study [PDF]

Iranian Journal of Medical Physics, 2022
Introduction: This research is a preliminary study of the development of Artificial Intelligence (AI) as a conversion tool from the pixel value of Cine a-Si 1000 Electronic Portal Imaging Device (EPID) images to dose.
Muhammad Ramadhan, Wahyu Wibowo, Supriyanto Pawiro   +2 more
doaj   +1 more source

Twin machines validation for VMAT treatments using electronic portal-imaging device: a multicenter study. [PDF]

Radiat Oncol, 2016
Fenoglietto P, Khodri M, Nguyen D, Josserand-Pietri F, Aillères N.   +4 more
europepmc   +2 more sources

Evaluation of Patient Set Up Errors in Head and Neck Three-Dimensional (3D) Conformal and Intensity-Modulated Radiotherapy Using Electronic Portal Imaging Device [PDF]

Iranian Journal of Medical Physics, 2022
Introduction: Interfractional set-up variations may cause deviation of the delivered dose from the planned dose distribution. This study aimed at calculating random and systematic set-up errors using an electronic portal imaging device (EPID) to set the ...
Alireza Farajollahi, narjes mohammadzadeh, Mehdi Momennezhad, shahrokh naseri, shokoufeh mohebbi, Fateme Shahedi, shadi mohebbi   +6 more
doaj   +1 more source

A remote EPID-based dosimetric TPS-planned audit of centers for clinical trials: outcomes and analysis of contributing factors

Radiation Oncology, 2018
Background A novel remote method for external dosimetric TPS-planned auditing of intensity modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT) for clinical trials using electronic portal imaging device (EPID) has been developed. The
Narges Miri, Kimberley Legge, Kim Colyvas, Joerg Lehmann, Philip Vial, Alisha Moore, Monica Harris, Peter B. Greer   +7 more
doaj   +1 more source

Simple electronic portal imager-based pretreatment quality assurance using Acuros XB: A feasibility study

Journal of Medical Physics, 2019
Objective: This study demonstrates a novel electronic portal imaging device (EPID)-based forward dosimetry approach for pretreatment quality assurance aided by a treatment planning system (TPS).
Arjunan Manikandan, Sureka Chandra Sekaran, Biplab Sarkar, Sujatha Manikandan   +3 more
doaj   +1 more source