TLD-based quality audit for radiotherapy dosimetry under reference and non-reference condition in Henan province
10.3760/cma.j.issn.0254-5098.2014.06.013
- VernacularTitle:河南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:
Xiaojun CHENG
;
Chuanpeng HU
;
Hongbing QIAO
;
Kunjie WEI
;
Suming LUO
;
Zhijian HE
- Publication Type:Journal Article
- Keywords:
TLD;
Reference and non-reference conditions;
Finger ionization chamber;
Plane parallel ionization chamber;
Photon beam;
Electron beam
- From:
Chinese Journal of Radiological Medicine and Protection
2014;34(6):446-450
- CountryChina
- Language:Chinese
-
Abstract:
Objective To verify the reliability of radiotherapy dosimetric parameters in reference and non-reference conditions using thermoluminescent dosimeters (TLDs).Methods Using the established TLD method,the dose variations with different radiation field sizes and 45 ° wedge plate were verified for 10 photon beams of 6 MV,together with dosimetric parameters at the point of maximum axial dose for 4 electron beams of 9 MeV under reference and non-reference conditions.Comparisons were made between TLD results and finger ionization chamber results.Results The average relative deviation,for 6 MV photon beams,between TLD results and finger ionization chamber measurements was 4.7％,within ± 7％ as required by the IAEA.The average relative deviation,for 9 MeV electron beam,between TLD results and plane parallel ionization chamber measurements was 2.4 ％,not beyond ± 5％ permitted by IAEA.Conclusions Using TLD method to verify the radiotherapy dosimetric parameters in reference and non-reference conditions was reliable,simple and feasible.
