Elementary properties of thermoluminescent dosimeter in dosimetry for tumor radiotherapy
Jiang Fenfen,Wang Pei,Kang Shengwei,Qi Guohai,Xiao Mingyong,Li Jie
Department of Radiation Oncology,Jiangxi Maternal and Child Health Hospital,Nanchang 330006,China (Jiang FF);Department of Radiation Oncology,Sichuan Tumor Hospital,Chengdu 610041,China (Wang P,Kang SHW,Qi GH,Xiao MY,Li J)
Abstract： Objective To explore the elementary properties of LiF (Mg, Cu, and P) thermoluminescent dosimeter (TLD) in dosimetry for tumor radiotherapy, and to provide a reliable basis for thermoluminescent dosimetry in clinical radiotherapy. Methods 60Coγ-ray and 6 MV X-ray were used for evaluation of the dispersion, repeatability, and dose response of LiF TLD. To meet the requirement of clinical radiotherapy, the effects of energy, dose (50-600 cGy), radiation dose rate (50-600 MU/min), and the angle of incidence for accelerator gantry (0°-±90°) on TLD were determined and the respective correction factors were calculated. Results The errors of repeatability and dispersion of TLD were less than ±3%. There was a linear relationship between readout and irradiation dose within a certain range of irradiation dose. The minimal relative deviation of 0.3% was obtained when 6 MV X-ray was used with a dose rate of 300 MU/min and an angle of incidence of 0°. Conclusions LiF TLD shows excellent repeatability, low dispersion, high stability, and strong linear correlation. It meets the international criteria and can be used for dose measurement in tumor radiotherapy.
Jiang Fenfen,Wang Pei,Kang Shengwei et al. Elementary properties of thermoluminescent dosimeter in dosimetry for tumor radiotherapy[J]. Chinese Journal of Radiation Oncology, 2016, 25(5): 496-499.
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2016, Vol. 25 
