摘要
目的在北京地区三级甲等医院中,用TLD完成非参考条件下放射治疗剂量比对。方法TLD系统用60Coγ线束校准。TLD读数经能量响应及TLD支架减弱等校正因子的修正。结果高能光子束DEAG/DUSER的平均比值是1.001;高能电子束DEAG/DUSER的平均比值是1.000。结论按照IAEA的要求,医院的TLD剂量比对扩展不确定度（k=2）不大于5%。比对结果表明,参加比对的这些医院的高能光子束的合格率是98%,高能电子束的合格率是100%。
Objective To carry out TLD comparisons for radiotherapy dosimetry in non-reference conditions in some advanced hospitals in Beijing. Methods The TLD measuring system was calibrated in Co-60 γ-ray beam. The readings were corrected by energy response and TLD holder attenuation correction factors. Results For high energy photon beams, the mean ratio of EAG＇ s dose to user＇ s dose （ DEAC/DusER ） is 1.001 ; For high energy electron beams, the mean ratio of DEAC DUSER is 1.000. Conclusions According to IAEA requirement, TLD dose comparison error for hospital, the expanded uncertainty （k = 2） shall not be more than 5%. The results indicate that the qualified rates are 98% for high energy photon beams and 100% for high energy electron beams in the participating hospitals.
出处
《中华放射医学与防护杂志》
CAS
CSCD
北大核心
2007年第3期285-287,共3页
Chinese Journal of Radiological Medicine and Protection
基金
国际原子能机构基金资助项目（11916/R0）
志谢 此次比对得到了中国医学科学院肿瘤医院、北京医院、北京协和医院、解放军总医院、中日友好医院物理师们的大力支持,在此一并表示感谢
关键词
TLD
非参考条件
光子束
电子束
Thermoluminescence dosimetry
beam Non-reference condition
Photon beam
Electron
