Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/92513
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: Dosimetric properties of fluoroscopic EPID for transit dosimetry
Author: Anvari, A.
Aghamiri, S.
Mahdavi, S.
Alaei, P.
Mohammadi, M.
Citation: Journal of Radiotherapy in Practice, 2015; 14(1):27-34
Publisher: Cambridge University Press
Issue Date: 2015
ISSN: 1460-3969
1467-1131
Statement of
Responsibility: 
Akbar Anvari, Seyed Mahmoud Reza Aghamiri, Seyed Rabi Mahdavi, Parham Alaei, Mohammad Mohammadi
Abstract: The aim of this work was to evaluate dose response of fluoroscopic EPID for transit dosimetry applications. Properties studied included warm up time, build-up thickness evaluation, dose history, linearity, stability, and short and long-term reproducibility of EPID response, as well as field size dependence. Pixel value matrices of electronic portal images in DICOM format were analysed in central and 8 off axis points using customised written codes in Matlab. In order to do this, nine 26×26 pixel matrices were selected as regions of interest, the regions represented by these arrays were 1×1 and 0·65×0·65 cm2 at the EPID and isocentre level, respectively. Necessary warm up time for stable operation of EPID is 30 minutes, and there is no need for extra build-up layer to increase the dose response. Linearity tests indicate charged coupled device camera of EPID saturates at 50 cGy level, and does not have linear relationship with dose. Reproducibility and stability of the measurements were excellent and the detector showed same signal with a maximum deviation of <0·3% both in short and long terms. Results of dosimetric evaluation have shown the TheraView fluoroscopic EPID can be used for transit dosimetry purposes.
Keywords: dose response; dosimetry; epid; portal imaging
Rights: © Cambridge University Press 2014
RMID: 0030028683
DOI: 10.1017/S1460396914000405
Appears in Collections:IPAS publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.