Novel high resolution I brachytherapy source dosimetry using Ge-doped optical fibres
Issa, F, Nisbet, A, Bradley, DA and Hugtenburg, RP (2013) Novel high resolution I brachytherapy source dosimetry using Ge-doped optical fibres Radiation Physics and Chemistry, 92. pp. 48-53.
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Abstract
The steep dose gradients close to brachytherapy sources limit the ability to obtain accurate measurements of dose. Here we use a novel high spatial resolution dosimeter to measure dose around a I source and compare against simulations. Ge-doped optical fibres, used as thermoluminescent dosimeters, offer sub-mm spatial resolution, linear response from 10cGy to >1kGy and dose-rate independence. For a I brachytherapy seed in a PMMA phantom, doses were obtained for source-dosimeter separations from 0.1cm up to several cm, supported by EGSnrc/DOSRZznrc Monte Carlo simulations and treatment planning system data. The measurements agree with simulations to within 2.3%±0.3% along the transverse and perpendicular axes and within 3.0%±0.5% for measurements investigating anisotropy in angular dose distribution. Measured and Veriseed™ brachytherapy treatment planning system (TPS) values agreed to within 2.7%±0.5%.Ge-doped optical fibre dosimeters allow detailed dose mapping around brachytherapy sources, not least in situations of high dose gradient. © 2013 Elsevier Ltd.
Item Type: | Article |
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Divisions : | Surrey research (other units) |
Authors : | Issa, F, Nisbet, A, Bradley, DA and Hugtenburg, RP |
Date : | November 2013 |
DOI : | 10.1016/j.radphyschem.2013.06.005 |
Depositing User : | Symplectic Elements |
Date Deposited : | 28 Mar 2017 13:23 |
Last Modified : | 24 Jan 2020 12:12 |
URI: | http://epubs.surrey.ac.uk/id/eprint/804004 |
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