利用自制水模进行水吸收剂量测试  

Testing of water absorbed dose using self-made water phantom

作　　者：田璐[1] 陆逊[2] 范杰[3,4] 陈鹏 董凤华 黄平[4] TIAN Lu;LU Xun;FAN Jie;CHEN Peng;DONG Fenghua;HUANG Ping(Sichuan Academy of Medical Sciences·Sichuan Provincial People's Hospital,Chengdu 610000,China;Shanghai Institute of Measurement and Testing Technology,Shanghai 201203,China;National Institute of Measurement and Testing Technology,Chengdu 610021,China;China Testing Technology Co.,Ltd.,Chengdu 610021,China)

机构地区：[1]四川省医学科学院·四川省人民医院,四川成都610000 [2]上海市计量测试技术研究院,上海201203 [3]中国测试技术研究院,四川成都610021 [4]中测测试科技有限公司,四川成都610021

出　　处：《中国测试》2021年第S02期200-203,共4页China Measurement & Test

基　　金：四川省科技计划资助(2020YFG0019)

摘　　要：根据IAEA TRS398报告的要求,自制相应的水吸收剂量水模和防水套管。考虑到制作水模和套管材料的加工工艺、电子密度和等效原子序数等与IAEA提供的水模和套管可能存在一定的差异,从而影响最终测量结果,在该文中用两种方法验证自制水模和套管对测量结果的影响,一是采用E;值作为评判标准,结果符合较好;二是采用替代法进行验证,结果发现使用自制水模和自制套管的时候相对误差最大,为0.70%。从两种方法验证的结果可以看出,虽然自制水模和自制套管符合IAEA的要求,能够满足水吸收剂量的测量,但是由于其差异,必然会给实际测量引入一定的不确定性,这一点需要考虑在最终的测量结果中。According to the requirements of the IAEA TRS398 report,the corresponding water absorption dose water phantom and waterproof casing were self-made.Considering that the processing technology,electron density and equivalent atomic number of the water phantom and casing material may be different from the water phantom and casing provided by IAEA,which may affect the final measurement results,two methods are used in this article to verify the influence of the self-made water phantom and casing on the measurement results.one is to use the values of E;as the evaluation standard and the results are in good agreement.The other is to use the substitution method for verification,and it is found that the relative error is the largest when using the self-made water model and the self-made casing,which is 0.70%.From the verification results of the two methods,it can be seen that although the self-made water phantom and self-made casing meet the requirements of IAEA and can measure the water absorbed dose,but due to their differences,they will inevitably introduce a certain degree of uncertainty to the actual measurement which needs to be taken into account in the final measurement.

关 键 词：IAEA TRS398报告 水吸收剂量 水模 防水套 

分 类 号：R812[医药卫生—放射医学]