Elementary properties of thermoluminescent dosimeter in dosimetry for tumor radiotherapy
10.3760/cma.j.issn.1004-4221.2016.05.016
- VernacularTitle:TLD在肿瘤放疗中剂量测量基本特性研究
- Author:
Fenfen JANG
;
Pei WANG
;
Shengwei KANG
;
Guohai QI
;
Mingyong XIAO
;
Jie LI
- Publication Type:Journal Article
- Keywords:
Thermo luminescent dosimeter;
Radiotherapy;
Dosimetry;
Fundamental characteristics;
Relative deviation
- From:
Chinese Journal of Radiation Oncology
2016;25(5):496-499
- CountryChina
- Language:Chinese
-
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.
