Results 31 to 40 of about 7,410 (208)

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

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

Contrast enhancement of EPID images via difference imaging : a feasibility study

, 2010
In this study, the feasibility of difference imaging for improving the contrast of electronic portal imaging device (EPID) images is investigated. The difference imaging technique consists of the acquisition of two EPID images (with and without the ...
Khoei, Shadi, Fielding, Andrew L., T Kairn, J V Trapp, Markwell, Tim, S Khoei, Trapp, Jamie, A L Fielding, T S Markwell, Kairn, Tanya   +9 more
core   +1 more source

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

A method for determining the performance of formulas for calculating the crack width and spacing in reinforced concrete elements

Structural Concrete, EarlyView.
Abstract Numerous studies have been conducted to determine the performance of formulas for calculating crack width and spacing in reinforced concrete structures. Generally, these studies pay limited attention to the application areas of those formulas and how to compare different representations of the crack width and spacing.
Anton van der Esch, Rob Wolfs, Simon Wijte   +2 more
wiley   +1 more source

Four-Dimensional In Vivo Dosimetry By Dose Reconstruction Using Continuous Epid Images And Phase Sorting Method

, 2023
In vivo dosimetry is widely used for patient specific dose evaluation and treatment verification in external beam radiation therapy (EBRT). There is a growing interest in using an electronic portal imaging device (EPID) for in vivo dosimetry, by ...
NC DOCKS at East Carolina University, Yoon, JiHyung   +1 more
core  

A Review of the Australian MRI Linac Program: From Pie in the Sky to Research Milestone

Journal of Medical Imaging and Radiation Oncology, EarlyView.
ABSTRACT The Australian Magnetic Resonance Imaging (MRI) Linear Accelerator program (MRI linac) was a major research project that aimed to build and test a unique MRI linac prototype for cancer treatment. It aimed to improve radiotherapy anatomical targeting and explore physiological targeting. The purpose of this report is to summarise the development
Michael Bernard Barton, Geoffrey Paul Delaney, Peter Greer, Lois Holloway, Peter Metcalfe, Robba Rai, Trang Pham, William S. Price, David Waddington, Stuart Crozier, Paul Keall   +10 more
wiley   +1 more source