高能电子线TLD剂量质量核查  

Research on TLD dose quality audit for radiotherapy dosimetry in higy energy electron beams

作　　者：何志坚[1] 罗素明[1] 袁继龙[1] 李开宝[1] 

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室,北京100088

出　　处：《中国医学装备》2014年第2期13-17,共5页China Medical Equipment

基　　金：卫生行业科研专项(201002009)"辐射危害控制与核辐射卫生应急处置关键技术及其研究"

摘　　要：目的:基于国家专项经费的支持,开展江苏、河南和湖北3省常用临床治疗条件高能电子线水中吸收剂量的核查工作。方法:采用平行板电离室和指型电离室完成高能电子线水中吸收剂量的测量,剂量核查使用的热释光剂量计(TLD)在电子线下照射。TLD系统使用60Coγ射线校准。结果:DEAG/DUSER的平均比值为1.012,最大值为1.056,最小值为0.961。结论:按照国际原子能机构(IAEA)的要求,TLD扩展不确定度(k=2)≤5%。核查结果表明,参加此次核查的医院高能电子线合格率为94.2%。Objective：To carry out absorbed dose to water quality audit in high energy electron beam commonly used in clinical treatment conditions in the three provinces of Jiangsu, Henan, Hubei under the special funds to support. Methods： Measure the absorbed dose to water with a plane parallel ionization chamber and refers to the type of ionization chamber in high energy electron beams, then irradiate TLDs used for dose qulity audit. TLD reader system was calibrated in 60Coγbeam. Results：DEAG/DUSER＆#39;s average ratio is 1.012, the maximum value of 1.056, the minimum value of 0.961. Conclusion： According to the requirements of the IAEA, TLD expanded uncertainty （k=2） is not greater than 5%. The result shows that the qualified rate of the participating hospitals is 94.2%for high energy electron beams.

关 键 词：电子线 剂量 核查 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]