Results 31 to 40 of about 8,606 (195)

The influence of acquisition mode on the dosimetric performance of an amorphous silicon electronic portal imaging device

Journal of Medical Physics, 2017
Aims: This study investigates the impact of cine acquisition mode on the dosimetric characteristics of a Varian aS500 amorphous silicon electronic portal imaging device (a-Si EPID).
Omemh Bawazeer, Sisira Herath, Siva Sarasanandarajah, Tomas Kron, Pradip Deb   +4 more
doaj   +1 more source

EPID‐based dosimetry to verify IMRT planar dose distribution for the aS1200 EPID and FFF beams [PDF]

Journal of Applied Clinical Medical Physics, 2016
We proposed to perform a basic dosimetry commissioning on a new imager system, the Varian aS1200 electronic portal imaging device (EPID) and TrueBeam 2.0 linear accelerator for flattened (FF) and flattening filter‐free (FFF) beams, then to develop an image‐based quality assurance (QA) model for verification of the system delivery accuracy for intensity‐
Miri, Narges, Keller, Peter, Zwan, Benjamin J., Greer, Peter   +3 more
openaire   +2 more sources

Use of Amorphous Silicon (ASi) Electronic Portal Imaging Devices for Other applications for Linear Accelerator Quality Assurance [PDF]

Iranian Journal of Medical Physics, 2021
Introduction: The success of radiation therapy depends critically on the accuracy of patient alignment in treatment position day after day. The primary use for Electronic portal imaging devices (EPIDs) is to monitor patient position during daily ...
Gena Mohamed, Khaled M. El-Shahat, Mahmoud Salem, Atef El-Taher   +3 more
doaj   +1 more source

Evaluation of relative transmitted dose for a step and shoot head and neck intensity modulated radiation therapy using a scanning liquid ionization chamber electronic portal imaging device

Journal of Medical Physics, 2012
The dose delivery verification for a head and neck static intensity modulated radiation therapy (IMRT) case using a scanning liquid ionization chamber electronic portal imaging device (SLIC-EPID) was investigated.
Mohammad Mohammadi, Eva Bezak
doaj   +1 more source

Investigating the effectiveness of monitoring relevant variations during IMRT and VMAT treatments by EPID-based 3D in vivo verification performed using planning CTs.

PLoS ONE, 2019
PURPOSE:The goal of this study was to investigate the effectiveness of monitoring relevant variations during treatments for electronic portal imaging device (EPID)-based 3D in vivo verification performed using planning CTs.
Yinghui Li, Jinhan Zhu, Jinping Shi, Lixin Chen, Xiaowei Liu   +4 more
doaj   +1 more source

Perbandingan Verifikasi Akurasi Posisi Pasien Radioterapi Secara Manual dan Semiotomatis Berbasis Citra DRR/EPID

Indonesian Journal of Cancer, 2016
Radiotherapy is one of common treatment modality for Nasopharyngeal Cancer. The development of intensity modulated radiotherapy (IMRT technique) gives satisfactory results in the nasopharyngeal cancer treatment, both clinically and dosimetry.
SUSI NOFRIDIANITA
doaj   +1 more source

Comparison of electronic portal imaging device-based Winston–Lutz analysis software

South African Journal of Oncology
Background: Stereotactic radiosurgery (SRS) with a linear accelerator requires submillimetre geometric accuracy. The Winston–Lutz (WL) test verifies coincidence among radiation, mechanical, and imaging isocentres.
Hein Fourie, Carolien de Ridder, Sakhele Shiba   +2 more
doaj   +1 more source

EPID-Based Setup Error Correction in Head and Neck Radiotherapy [PDF]

Iranian Journal of Medical Physics
Introduction: This study introduces and evaluates a novel optimized averaging method for Electronic Portal Imaging Device (EPID)-based setup corrections, comparing it with conventional approaches.
Mohamad Pursamimi, Mahdi Ghorbani, Mehdi Khosravi, Seyed Mohammad Hosseini, Ahmad Shakeri, Sibusiso Mdletshe   +5 more
doaj   +1 more source

Dose calibration of EPIDs for segmented IMRT dosimetry [PDF]

Journal of Applied Clinical Medical Physics, 2014
The purpose of this study was to investigate the dose response of amorphous silicon (a‐Si) electronic portal imaging devices (EPIDs) under different acquisition settings for both open jaw defined fields and segmented intensity‐modulated radiation therapy (IMRT) fields. Four different EPIDs were used.
Deshpande, S, Xing, A, Holloway, L, Metcalfe, P, Vial, P   +4 more
openaire   +3 more sources

Dosimetric properties of an amorphous silicon EPID for verification of modulated electron radiotherapy

, 2013
Purpose: To investigate the dosimetric properties of an electronic portal imaging device (EPID) for electron beam detection and to evaluate its potential for quality assurance (QA) of modulated electron radiotherapy (MERT).
Henzen, Dominik, Favre, Pascal, Stefan Scheib, Daniel Vetterli, Dominik Henzen, Morf, Daniel, Fix, Michael K., Daniel Morf, Pascal Favre, Michael K. Fix, Scheib, Stefan, Vetterli, Daniel, Manser, Peter, Peter Manser, Chatelain, Cécile, Cécile Chatelain   +15 more
core   +1 more source