Verification of dose parameters under reference and non-reference conditions for radiotherapy in Liaoning province
10.3760/cma.j.issn.0254-5098.2014.06.015
- VernacularTitle:辽宁省核查放射治疗参考与非参考条件下剂量学参数方法验证
- Author:
Yong CUI
;
Baochen LIU
;
Zhongxing CHEN
;
Junqiao GUO
;
Suming LUO
;
Zhijian HE
;
Jilong YUAN
- Publication Type:Journal Article
- Keywords:
TLD;
Reference and non-reference conditions;
Finger ionization chamber;
Plane parallel ionization chambers;
Photon beams;
Electron beams
- From:
Chinese Journal of Radiological Medicine and Protection
2014;34(6):456-460
- CountryChina
- Language:Chinese
-
Abstract:
Objective To verify the reliability of dose parameters of radiotherapy under reference and non-reference conditions by using TLD.Methods Dose parameters were verified by using TLDs under reference and non-reference conditions,including the maximum dose in axel of 5 electron beams with energy of 9 MeV and the variations of dose by depth,source-skin distance,exposure field and 45° wedge for 10 photon beams with energy of 6 MV in 5 hospitals.Results The average relative deviation of 6 MV photon beam measured between TLDs and finger ionization chambers were 4.45%,within ± 7% as required by IAEA.The average relative deviation of 9 MeV electron beam measured between TLDs and plane parallel chambers were 2.45%,within ± 5% was required by IAEA.Conclusions Measuring dosimetric parameters by using TLDs under reference and non-reference conditions was reliable and feasible.