Verification of dose parameters under reference and non-reference conditions for radiotherapy in Liaoning province

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.