^(99m)Tc诊断过程中辐射场特征及其源强测量  

Measurement of Radiation Field Feature and Source Strength in the Process of Diagnosis with ^(99m)Tc

作　　者：孙海 顾先宝 於国兵 李飞[2] 张敬苗[2] 谭华艳 王元[3] 

机构地区：[1]安徽省辐射环境监督站,合肥230022 [2]安徽医科大学第二附属医院,合肥230022 [3]中国科学技术大学,合肥230022

出　　处：《核电子学与探测技术》2017年第1期72-75,共4页Nuclear Electronics & Detection Technology

摘　　要：为了掌握^(99m)Tc诊断全过程中所产生辐射场特征和源强,利用HPGeγ谱仪及其无源效率刻度技术,分析了99Mo和^(99m)Tc发射的主要γ射线对辐射场的贡献。使用主动测量和被动测量相结合的方式,测量了^(99m)Tc诊断过程中各个操作环节中的辐射源强。实验结果表明:99Mo-^(99m)Tc发生器淋洗前、后主要的γ射线发射率之比变化较大;随着距离的增加,99Mo-^(99m)Tc发生器、注射器和病人表面的γ辐射空气吸收剂量率快速衰减;^(99m)Tc诊断一天,放射性药品操作人员手部剂量达到0.41 m Sv。In order to have a good knowledge of the radiation feature and source strength in the whole process of diagnosis with 99mTc, we have analyzed the variation which is caused by the primary γray of 99Mo and 99mTc u- sing HPGe γspectrometer and the technology of efficient calibration without source. And we also have measured the radiation intensity of source combing active measurement with passive measurement. The experimental suits show that the ratio of the main γ ray emissivity changes greatly before and after the elution. The absorbed dose rate of 99Mo- 99mTc generator, syringe, and the surface of patient decrease rapidly with the increase of dis- tance. The hands of operates can totally suffer 0.41mSv dose in the whole process of diagnosis with 99mTc in one day.

关 键 词：99mTc诊断 辐射场特征 辐射源强 

分 类 号：R144[医药卫生—公共卫生与预防医学]