کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1885679 1043440 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimum parameters of TLD100 powder used for radiotherapy beams calibration check
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
Optimum parameters of TLD100 powder used for radiotherapy beams calibration check
چکیده انگلیسی
External audit of the absorbed dose determination from radiotherapy machines is performed using Lithium fluoride (LiF) TLD-100. Optimal parameters needed to obtain highly accurate dosage from LiF powder was investigated, including the setup of the Harshaw 4000 reader. A linear correspondence between the thermoluminescent signal and the mass of the powder was observed, demonstrating that the dose can be evaluated with small samples of powder. The reproducibility of the thermoluminescence dosimeter (TLD) readings obtained with up to 10 samples from 1 capsule containing 160 mg of powder was around 1.5% (1 standard deviation [SD]). The time required for the manual evaluation of TLDs can be improved by 3 readings without loss of accuracy. Better reproducibility is achieved if the capsules are evaluated 7 days after irradiation using a nitrogen flow of 300 cc/min.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Medical Dosimetry - Volume 31, Issue 3, Autumn 2006, Pages 184-189
نویسندگان
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