Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/90867
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Type: Journal article
Title: Peripheral photon and neutron doses from prostate cancer external beam irradiation
Author: Bezak, E.
Takam, R.
Marcu, L.
Citation: Radiation Protection Dosimetry, 2015; 167(4):591-601
Publisher: Oxford University Press (OUP)
Issue Date: 2015
ISSN: 0144-8420
1742-3406
Statement of
Responsibility: 
Eva Bezak, Rundgham Takam and Loredana G. Marcu
Abstract: Peripheral photon and neutron doses from external beam radiotherapy (EBRT) are associated with increased risk of carcinogenesis in the out-of-field organs; thus, dose estimations of secondary radiation are imperative. Peripheral photon and neutron doses from EBRT of prostate carcinoma were measured in Rando phantom. (6)LiF:Mg,Cu,P and (7)LiF:Mg,Cu,P glass-rod thermoluminescence dosemeters (TLDs) were inserted in slices of a Rando phantom followed by exposure to 80 Gy with 18-MV photon four-field 3D-CRT technique. The TLDs were calibrated using 6- and 18-MV X-ray beam. Neutron dose equivalents measured with CR-39 etch-track detectors were used to derive readout-to-neutron dose conversion factor for (6)LiF:Mg,Cu,P TLDs. Average neutron dose equivalents per 1 Gy of isocentre dose were 3.8±0.9 mSv Gy(-1) for thyroid and 7.0±5.4 mSv Gy(-1) for colon. For photons, the average dose equivalents per 1 Gy of isocentre dose were 0.2±0.1 mSv Gy(-1) for thyroid and 8.1±9.7 mSv Gy(-1) for colon. Paired (6)LiF:Mg,Cu,P and (7)LiF:Mg,Cu,P TLDs can be used to measure photon and neutron doses simultaneously. Organs in close proximity to target received larger doses from photons than those from neutrons whereas distally located organs received higher neutron versus photon dose.
Keywords: Humans; Prostatic Neoplasms; Radiation Dosage; Thermoluminescent Dosimetry; Phantoms, Imaging; Neutrons; Photons; Particle Accelerators; Male; Organs at Risk
Description: First published online: January 5, 2015
Rights: © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com
RMID: 0030019529
DOI: 10.1093/rpd/ncu362
Appears in Collections:Physics publications

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