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Radiotherapy dosimetry using a commercial OSL system
Author(s) -
Viamonte A.,
da Rosa L. A. R.,
Buckley L. A.,
Cherpak A.,
Cygler J. E.
Publication year - 2008
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2841940
Subject(s) - optically stimulated luminescence , dosimetry , dosimeter , ionization chamber , materials science , radiation , dose profile , optics , radiation therapy , detector , particle detector , nuclear medicine , ionization , physics , medicine , radiology , ion , quantum mechanics
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 2 O 3 : C , as a radiation detector material. Using this OSL system, a percent depth dose curve forC60 o 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 theAl 2 O 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.