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文章介绍了该实验室标准医用放射性活度测量装置的计量特性与控制，其各项性能指标均优于国家标准级活度测量仪检定规程所限定的要求。测量总不确定度小于±4％，经检定10种常用核素活度测量总不确定度均在±3．8％以内，57Co、241Am、137Cs、60Co4种核素，参加了全国核素活度计量比对，利用该装置测量提供的数据均在标准均值的±1．0％以内。多年来对装置进行严格地质量控制，连续3年用137Cs监督源监测，并建立了长期稳定性监控图，连续6年稳定性均控制在±0．6％以内；连续近两年对3种核素标准源进行测量准确度监测，其测量准确度的复现性137Cs和60Co小于1.0％，241Am小于1.6％。
This paper introduces the measurement characteristics and control of the laboratory standard medical radioactive activity measuring device, and its various performance indexes are better than those defined by the national standard grade activity measuring instrument verification procedures. The total uncertainty of the measurement is less than ± 4%. The total uncertainty of the measurement of the 10 commonly used nuclides is within ± 3.8% and 57Co, 241Am, 137Cs and 60Co4 nuclides, and participated in the national nuclide activity Degree measurement comparison, the data provided by the device measurements are within ± 1.0% of the standard mean. Over the years the device for strict quality control, monitoring of 137Cs for three consecutive years with the source monitoring and the establishment of a long-term stability monitoring chart, the stability of 6 consecutive years were controlled within ± 0.6%; for nearly two years for 3 The radionuclide standard source was used to monitor the measurement accuracy. The reproducibility of the measurement accuracy of 137Cs and 60Co was less than 1.0% and 241Am was less than 1.6%.