Characterization of Ge-doped optical fibres for MV radiotherapy dosimetry
Ge-doped optical fibres offer promising thermoluminescence (TL) properties together with small physical size and modest cost. Their use as dosimeters for postal radiotherapy dose audits of megavoltage photon beams has been investigated. Key dosimetric characteristics including reproducibility, linea...
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| Format: | Article |
| Language: | English |
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Elsevier
2014
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| Online Access: | http://psasir.upm.edu.my/id/eprint/36756/ http://psasir.upm.edu.my/id/eprint/36756/1/Characterization%20of%20Ge.pdf |
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| author | Mohd Noor, Noramaliza Hussein, Mohammad Kadni, Taiman Bradley, David A. Nisbet, Andrew |
| author_facet | Mohd Noor, Noramaliza Hussein, Mohammad Kadni, Taiman Bradley, David A. Nisbet, Andrew |
| author_sort | Mohd Noor, Noramaliza |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Ge-doped optical fibres offer promising thermoluminescence (TL) properties together with small physical size and modest cost. Their use as dosimeters for postal radiotherapy dose audits of megavoltage photon beams has been investigated. Key dosimetric characteristics including reproducibility, linearity, dose rate, temperature and angular dependence have been established. A methodology of measuring absorbed dose under reference conditions was developed. The Ge-doped optical fibres offer linearity between TL yield and dose, with a reproducibility of better than 5%, following repeated measurements (n=5) for doses from 5 cGy to 1000 cGy. The fibres also offer dose rate, angular and temperature independence, while an energy-dependent response of 7% was found over the energy range 6 MV to 15 MV (TPR20,10 of 0.660, 0.723 and 0.774 for 6, 10 and 15 MV respectively). The audit methodology has been developed with an expanded uncertainty of 4.22% at 95% confidence interval for the photon beams studied. |
| first_indexed | 2025-11-15T09:34:14Z |
| format | Article |
| id | upm-36756 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:34:14Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-367562015-10-06T03:38:09Z http://psasir.upm.edu.my/id/eprint/36756/ Characterization of Ge-doped optical fibres for MV radiotherapy dosimetry Mohd Noor, Noramaliza Hussein, Mohammad Kadni, Taiman Bradley, David A. Nisbet, Andrew Ge-doped optical fibres offer promising thermoluminescence (TL) properties together with small physical size and modest cost. Their use as dosimeters for postal radiotherapy dose audits of megavoltage photon beams has been investigated. Key dosimetric characteristics including reproducibility, linearity, dose rate, temperature and angular dependence have been established. A methodology of measuring absorbed dose under reference conditions was developed. The Ge-doped optical fibres offer linearity between TL yield and dose, with a reproducibility of better than 5%, following repeated measurements (n=5) for doses from 5 cGy to 1000 cGy. The fibres also offer dose rate, angular and temperature independence, while an energy-dependent response of 7% was found over the energy range 6 MV to 15 MV (TPR20,10 of 0.660, 0.723 and 0.774 for 6, 10 and 15 MV respectively). The audit methodology has been developed with an expanded uncertainty of 4.22% at 95% confidence interval for the photon beams studied. Elsevier 2014-05 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/36756/1/Characterization%20of%20Ge.pdf Mohd Noor, Noramaliza and Hussein, Mohammad and Kadni, Taiman and Bradley, David A. and Nisbet, Andrew (2014) Characterization of Ge-doped optical fibres for MV radiotherapy dosimetry. Radiation Physics and Chemistry, 98. pp. 33-41. ISSN 0969-806X; ESSN: 1879-0895 10.1016/j.radphyschem.2013.12.017 |
| spellingShingle | Mohd Noor, Noramaliza Hussein, Mohammad Kadni, Taiman Bradley, David A. Nisbet, Andrew Characterization of Ge-doped optical fibres for MV radiotherapy dosimetry |
| title | Characterization of Ge-doped optical fibres for MV radiotherapy dosimetry |
| title_full | Characterization of Ge-doped optical fibres for MV radiotherapy dosimetry |
| title_fullStr | Characterization of Ge-doped optical fibres for MV radiotherapy dosimetry |
| title_full_unstemmed | Characterization of Ge-doped optical fibres for MV radiotherapy dosimetry |
| title_short | Characterization of Ge-doped optical fibres for MV radiotherapy dosimetry |
| title_sort | characterization of ge-doped optical fibres for mv radiotherapy dosimetry |
| url | http://psasir.upm.edu.my/id/eprint/36756/ http://psasir.upm.edu.my/id/eprint/36756/ http://psasir.upm.edu.my/id/eprint/36756/1/Characterization%20of%20Ge.pdf |