期刊
APPLIED RADIATION AND ISOTOPES
卷 71, 期 -, 页码 2-11出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2012.02.001
关键词
Radiation dosimetry; Radiotherapy; Synchrotron radiation; UV radiation; Dose enhancement; Optical fibres
Review is made of dosimetric studies of Ge-doped SiO2 telecommunication fibre as a 1-D thermoluminescence (TL) system for therapeutic applications. To-date, the response of these fibres has been investigated for UV sources, superficial X-ray beam therapy facilities, a synchrotron microbeam facility, electron linear accelerators, protons, neutrons and alpha particles, covering the energy range from a few eV to several MeV. Dosimetric characteristics include, reproducibility, fading, dose response, reciprocity between TL yield and dose-rate and energy dependence. The fibres produce a flat response to fixed photon and electron doses to within better than 3% of the mean TL distribution. Irradiated Ge-doped SiO2 optical fibres show limited signal fading, with an average loss of TL signal of similar to 0.4% per day. In terms of dose response, Ge-doped SiO2 optical fibres have been shown to provide linearity to x and electron doses, from a fraction of 1 Gy up to 2 kGy. The dosimeters have also been used in measuring photoelectron generation from iodinated contrast media; TL yields being some 60% greater in the presence of iodine than in its absence. The review is accompanied by previously unpublished data. (c) 2012 Elsevier Ltd. All rights reserved.
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