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Title: Radiotherapy dosimetry using a commercial OSL system

Abstract

A commercial optically stimulated luminescence (OSL) system developed for radiation protection dosimetry by Landauer, Inc., the InLight microStar reader, was tested for dosimetry procedures in radiotherapy. The system uses carbon-doped aluminum oxide, Al{sub 2}O{sub 3}:C, as a radiation detector material. Using this OSL system, a percent depth dose curve for {sup 60}Co gamma radiation was measured in solid water. Field size and SSD dependences of the detector response were also evaluated. The dose response relationship was investigated between 25 and 400 cGy. The decay of the response with time following irradiation and the energy dependence of the Al{sub 2}O{sub 3}:C OSL detectors were also measured. The results obtained using OSL dosimeters show good agreement with ionization chamber and diode measurements carried out under the same conditions. Reproducibility studies show that the response of the OSL system to repeated exposures is 2.5% (1sd), indicating a real possibility of applying the Landauer OSL commercial system for radiotherapy dosimetric procedures.

Authors:
; ; ; ;  [1];  [2];  [3];  [4]
  1. Programa de Qualidade em Radioterapia, Instituto Nacional de Cancer (INCA/MS), Rua do Resende 128 3 Andar. Centro. Rio de Janeiro, CEP: 20231-092, Rio de Janeiro (Brazil) and Nuclear Instrumentation Laboratory, COPPE/UFRJ, P.O. Box: 68509, 21941-972, Rio de Janeiro (Brazil)
  2. (IRD/CNEN), Av. Salvador Allende s/n, Rio de Janeiro, CEP: 22780-160, Rio de Janeiro (Brazil)
  3. (Canada)
  4. (Canada) and Physics Department, Carleton University, 1125 Colonel By Dr., Ottawa, Ontario K1S 5B6 (Canada)
Publication Date:
OSTI Identifier:
21120634
Resource Type:
Journal Article
Resource Relation:
Journal Name: Medical Physics; Journal Volume: 35; Journal Issue: 4; Other Information: DOI: 10.1118/1.2841940; (c) 2008 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; ALUMINIUM OXIDES; COBALT 60; DEPTH DOSE DISTRIBUTIONS; DOPED MATERIALS; DOSE-RESPONSE RELATIONSHIPS; DOSEMETERS; DOSIMETRY; ENERGY DEPENDENCE; GAMMA RADIATION; IONIZATION CHAMBERS; LUMINESCENCE; RADIATION PROTECTION; RADIOTHERAPY

Citation Formats

Viamonte, A., Rosa, L. A. R. da, Buckley, L. A., Cherpak, A., Cygler, J. E., Instituto de Radioprotecao e Dosimetria, Department of Medical Physics, Ottawa Hospital Regional Cancer Centre, 503 Smyth Rd., Ottawa, Ontario K1H 1C4, and Department of Medical Physics, Ottawa Hospital Regional Cancer Centre, 503 Smyth Rd. Ottawa, Ontario K1H 1C4. Radiotherapy dosimetry using a commercial OSL system. United States: N. p., 2008. Web. doi:10.1118/1.2841940.
Viamonte, A., Rosa, L. A. R. da, Buckley, L. A., Cherpak, A., Cygler, J. E., Instituto de Radioprotecao e Dosimetria, Department of Medical Physics, Ottawa Hospital Regional Cancer Centre, 503 Smyth Rd., Ottawa, Ontario K1H 1C4, & Department of Medical Physics, Ottawa Hospital Regional Cancer Centre, 503 Smyth Rd. Ottawa, Ontario K1H 1C4. Radiotherapy dosimetry using a commercial OSL system. United States. doi:10.1118/1.2841940.
Viamonte, A., Rosa, L. A. R. da, Buckley, L. A., Cherpak, A., Cygler, J. E., Instituto de Radioprotecao e Dosimetria, Department of Medical Physics, Ottawa Hospital Regional Cancer Centre, 503 Smyth Rd., Ottawa, Ontario K1H 1C4, and Department of Medical Physics, Ottawa Hospital Regional Cancer Centre, 503 Smyth Rd. Ottawa, Ontario K1H 1C4. Tue . "Radiotherapy dosimetry using a commercial OSL system". United States. doi:10.1118/1.2841940.
@article{osti_21120634,
title = {Radiotherapy dosimetry using a commercial OSL system},
author = {Viamonte, A. and Rosa, L. A. R. da and Buckley, L. A. and Cherpak, A. and Cygler, J. E. and Instituto de Radioprotecao e Dosimetria and Department of Medical Physics, Ottawa Hospital Regional Cancer Centre, 503 Smyth Rd., Ottawa, Ontario K1H 1C4 and Department of Medical Physics, Ottawa Hospital Regional Cancer Centre, 503 Smyth Rd. Ottawa, Ontario K1H 1C4},
abstractNote = {A commercial optically stimulated luminescence (OSL) system developed for radiation protection dosimetry by Landauer, Inc., the InLight microStar reader, was tested for dosimetry procedures in radiotherapy. The system uses carbon-doped aluminum oxide, Al{sub 2}O{sub 3}:C, as a radiation detector material. Using this OSL system, a percent depth dose curve for {sup 60}Co gamma radiation was measured in solid water. Field size and SSD dependences of the detector response were also evaluated. The dose response relationship was investigated between 25 and 400 cGy. The decay of the response with time following irradiation and the energy dependence of the Al{sub 2}O{sub 3}:C OSL detectors were also measured. The results obtained using OSL dosimeters show good agreement with ionization chamber and diode measurements carried out under the same conditions. Reproducibility studies show that the response of the OSL system to repeated exposures is 2.5% (1sd), indicating a real possibility of applying the Landauer OSL commercial system for radiotherapy dosimetric procedures.},
doi = {10.1118/1.2841940},
journal = {Medical Physics},
number = 4,
volume = 35,
place = {United States},
year = {Tue Apr 15 00:00:00 EDT 2008},
month = {Tue Apr 15 00:00:00 EDT 2008}
}