医用放射性活度计性能测试及分析  

The test and analysis for performance of medical radioactivity meter

作　　者：刘辉[1] 范振芳[1] 李璟瑜 宋颖[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》2017年第3期28-31,共4页China Medical Equipment

摘　　要：目的:对医用放射性活度计进行性能测试,探讨其性能测试结果和意义。方法:依据国家标准(GB/T10256-2013)"放射性活度计",利用标准活度计及标准放射源,检测放射性活度计的重复性、不稳定性及相对固有误差等性能指标。结果:检测70台放射性活度计,其重复性平均值为(0.50±0.44)%,最大值为1.94%,最小值为0.09%。不稳定性平均值为(0.91±0.47)%,最大值为2.65%,最小值为0.33%。相对固有误差:1^(60)Co平均值为(0.57±1.33)%,最大值为3.50%,最小值为-3.65%;2^(137)Cs平均值为(0.74±0.89)%,最大值为4.00%,最小值为-3.92%;3^(241)Am平均值为(-1.01±2.60)%,最大值为5.60%,最小值为-4.77%。结论:放射性活度计对低能核素的^(241)Am测量时性能稍差。通过定期检测,加强放射性活度计的质量控制,是保障临床诊断及治疗对放射性核素活度测量性能要求的必要措施。Objective： To test the performances for radioactivity meters and discuss their test results and values. Methods： According to the national standard of radioactivity meter（GB/T10256-2013）, a series of performance parameters for radioactivity meter, such as repeatability, instability and relative intrinsic error, were obtained by using standard radioactivity meter and standard radionuclide. Results： 70 radioactivity meters were tested, the mean of repeatability was（0.50±0.44）%, and the highest and the lowest data were 1.94% and 0.09%, respectively; the mean of instability was（0.91±0.47）%, and the highest and lowest data were 2.65% and 0.33%, respectively. The relative intrinsic errors： the mean of 60Co was（0.57±1.33）%, and the highest and the lowest data were 3.50% and-3.65%, respectively; the mean of ^（137）Cs was（0.74±0.89）%, the highest and the lowest data were 4.00% and-3.92%, respectively; the mean of 241Am was（-1.01±2.60）%, the highest and the lowest data were 5.60% and-4.77%, respectively. Conclusion： It is necessary to strengthen quality control for radioactivity meter, so that the devices come to the demands for testing activity of radionuclide in clinical practice.

关 键 词：放射性活度计 性能测试 重复性 相对固有误差 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]