Abdullah, N;
Bradley, DA;
Nisbet, A;
Kamarul Zaman, Z;
Deraman, SS;
Mohd Noor, N;
(2022)
Dosimetric characteristics of fabricated germanium doped optical fibres for a postal audit of therapy electron beams.
Radiation Physics and Chemistry
, 200
, Article 110346. 10.1016/j.radphyschem.2022.110346.
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Abstract
The dosimetric characteristics of germanium (Ge) doped optical fibres are investigated as a potential dosimetric alternative for electron beam therapy postal audits. The dosimetric characteristics of 6 mol% Ge-doped optical fibres fabricated as cylindrical fibres (CF) and flat fibres (FF) are established in terms of signal fading, linearity of dose-response, beam energy- and dose rate dependence. Pilot electron beam therapy audit study irradiations are made with a linear accelerator located at the Royal Surrey County Hospital, applying International Atomic Energy Agency (IAEA) standard irradiation procedures for reference and non-reference conditions. Results for the CF and FF show fading of 26% and 20% respectively at 120 days post-irradiation. For a 6 MeV electron beam the dose-response is observed to be linear over the dose range 1–3 Gy, the least determination coefficient, R2, being 0.985. The results of the electron beam therapy audit are within the tolerance limit of 5% recommended by the International Commission on Radiation Units and Measurements (ICRU) Report No. 24, with a maximum deviation of 4% for FF at a 6 MeV electron beam under non-reference conditions. In conclusion, the fabricated Ge-doped optical fibres are seen to offer suitability for use as an alternative dosimeter to TLD-100 in electron beam therapy postal audit.
| Type: | Article |
|---|---|
| Title: | Dosimetric characteristics of fabricated germanium doped optical fibres for a postal audit of therapy electron beams |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.radphyschem.2022.110346 |
| Publisher version: | https://doi.org/10.1016/j.radphyschem.2022.110346 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Fabricated Ge-Doped optical fibres, Electron beam therapy audit, Reference and non-reference conditions |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10152688 |
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