Preliminary experimental analysis of the feasibility of quartz glass for radiotherapy dosimetry
10.13491/j.issn.1004-714X.2023.03.002
- VernacularTitle:石英玻璃用于放射治疗剂量测量可行性的初步实验分析
- Author:
Xiangjie MA
1
;
Zhijian HE
1
;
Jilong YUAN
1
;
Qinghuan JIANG
1
;
Mingsheng LI
1
;
Xiao WEI
1
;
Yuze YANG
1
;
Jinsheng CHENG
1
Author Information
1. National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088 China.
- Publication Type:OriginalArticles
- Keywords:
Quartz;
Thermoluminescence;
Radiotherapy;
Absorbed dose;
Thermoluminescence glow curve;
Dosimetry
- From:
Chinese Journal of Radiological Health
2023;32(3):230-234
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the feasibility of quartz glass for radiotherapy dosimetry through the experimental study of the thermoluminescence characteristics of synthetic quartz glass. Methods The thermoluminescence glow curves of quartz glass under different annealing conditions were analyzed, the thermoluminescence characteristics of quartz glass were studied, and the measurement parameters were optimized. Using the Co-60 reference radiation field in the National Secondary Standard Dosimetry Laboratory, the quartz glass samples under different annealing conditions were irradiated following the dose levels of radiotherapy, i.e., 0.5, 1.0, 2.0, 4.0, 6.0, 8.0, and 10.0 Gy, respectively. According to the relationship between the absorbed dose of quartz glass and the relative thermoluminescence signal intensity, the linearity and dispersion of the dose response of quartz glass were obtained, and the feasibility of quartz glass for radiotherapy dosimetry was analyzed. Results The linear correlation coefficient of dose response of quartz glass under annealing condition of 430℃ for 10 min was 0.9984, and the dose response dispersion was 0.97% at the absorbed dose of 2 Gy. The linear correlation coefficient of dose response of quartz glass under annealing condition of 600℃ for 1 h was 0.9911, and the dose response dispersion was 1.4% at the absorbed dose of 2 Gy. Conclusion Preliminary results suggest that quartz glass with annealing condition of 430℃ for 10 min has the potential to be used for radiotherapy dosimetry.
