Al2O3:C and LiF: Mg, Ti characterisations at 100–150 kV energy range for computed tomography dose measurement
Performance characterisation has been carried out of nanoDot™ OSLDs and TLD-100™, validating their use for diagnostic x-ray dose profile assessments. Investigations include optical annealing, signal depletion, signal fading, dose-response, sensitivity, and energy dependence. Both dosimeter types wer...
| Main Authors: | , , , , , , |
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| Format: | Article |
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Elsevier
2022
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| Online Access: | http://psasir.upm.edu.my/id/eprint/100161/ |
| _version_ | 1848863249696555008 |
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| author | Omar, R.S. Hashim, S. Bradley, D.A. Karim, M.K.A. Kobayashi, I. Kadir, A.B.A. Hashim, A. |
| author_facet | Omar, R.S. Hashim, S. Bradley, D.A. Karim, M.K.A. Kobayashi, I. Kadir, A.B.A. Hashim, A. |
| author_sort | Omar, R.S. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Performance characterisation has been carried out of nanoDot™ OSLDs and TLD-100™, validating their use for diagnostic x-ray dose profile assessments. Investigations include optical annealing, signal depletion, signal fading, dose-response, sensitivity, and energy dependence. Both dosimeter types were exposed using the Constant Potential Industrial X-ray (Model Philips MG 165) in Standard Radiation Qualities (RQT) procedure located in Nuclear Malaysia, Bangi. OSLD annealing using a 14 W compact fluorescent lamp showed an average signal loss of ∼93% as a result of 60 min of illumination. For dosimetric signal depletion, screened nanoDot™ OSLDs gave rise to the most favorable performance, with a mean signal loss of 1.0% per reading. In respect of signal fading, similar favorable performance was found for the screened nanoDot™ OSLDs, after a stabilisation period of 11–12 days post-irradiation, the average reading decreased by ∼1% over a further 17 days. For doses up to 500 mGy the TLD-100™ and screened nanoDot™ OSLDs both provide a highly linear response, with a regression coefficient of 0.999 in both cases. Linear energy dependence was found for RQT spectra from 100 to 150 kV. |
| first_indexed | 2025-11-15T13:29:55Z |
| format | Article |
| id | upm-100161 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:29:55Z |
| publishDate | 2022 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1001612024-07-18T07:29:15Z http://psasir.upm.edu.my/id/eprint/100161/ Al2O3:C and LiF: Mg, Ti characterisations at 100–150 kV energy range for computed tomography dose measurement Omar, R.S. Hashim, S. Bradley, D.A. Karim, M.K.A. Kobayashi, I. Kadir, A.B.A. Hashim, A. Performance characterisation has been carried out of nanoDot™ OSLDs and TLD-100™, validating their use for diagnostic x-ray dose profile assessments. Investigations include optical annealing, signal depletion, signal fading, dose-response, sensitivity, and energy dependence. Both dosimeter types were exposed using the Constant Potential Industrial X-ray (Model Philips MG 165) in Standard Radiation Qualities (RQT) procedure located in Nuclear Malaysia, Bangi. OSLD annealing using a 14 W compact fluorescent lamp showed an average signal loss of ∼93% as a result of 60 min of illumination. For dosimetric signal depletion, screened nanoDot™ OSLDs gave rise to the most favorable performance, with a mean signal loss of 1.0% per reading. In respect of signal fading, similar favorable performance was found for the screened nanoDot™ OSLDs, after a stabilisation period of 11–12 days post-irradiation, the average reading decreased by ∼1% over a further 17 days. For doses up to 500 mGy the TLD-100™ and screened nanoDot™ OSLDs both provide a highly linear response, with a regression coefficient of 0.999 in both cases. Linear energy dependence was found for RQT spectra from 100 to 150 kV. Elsevier 2022-10 Article PeerReviewed Omar, R.S. and Hashim, S. and Bradley, D.A. and Karim, M.K.A. and Kobayashi, I. and Kadir, A.B.A. and Hashim, A. (2022) Al2O3:C and LiF: Mg, Ti characterisations at 100–150 kV energy range for computed tomography dose measurement. Radiation Physics and Chemistry, 199. art. no. 110365. pp. 1-5. ISSN 0969-806X https://www.sciencedirect.com/science/article/pii/S0969806X2200408X?via%3Dihub 10.1016/j.radphyschem.2022.110365 |
| spellingShingle | Omar, R.S. Hashim, S. Bradley, D.A. Karim, M.K.A. Kobayashi, I. Kadir, A.B.A. Hashim, A. Al2O3:C and LiF: Mg, Ti characterisations at 100–150 kV energy range for computed tomography dose measurement |
| title | Al2O3:C and LiF: Mg, Ti characterisations at 100–150 kV energy range for computed tomography dose measurement |
| title_full | Al2O3:C and LiF: Mg, Ti characterisations at 100–150 kV energy range for computed tomography dose measurement |
| title_fullStr | Al2O3:C and LiF: Mg, Ti characterisations at 100–150 kV energy range for computed tomography dose measurement |
| title_full_unstemmed | Al2O3:C and LiF: Mg, Ti characterisations at 100–150 kV energy range for computed tomography dose measurement |
| title_short | Al2O3:C and LiF: Mg, Ti characterisations at 100–150 kV energy range for computed tomography dose measurement |
| title_sort | al2o3:c and lif: mg, ti characterisations at 100–150 kv energy range for computed tomography dose measurement |
| url | http://psasir.upm.edu.my/id/eprint/100161/ http://psasir.upm.edu.my/id/eprint/100161/ http://psasir.upm.edu.my/id/eprint/100161/ |