| 孔淑颖,周强,拓飞,等.放射性核素γ能谱检测实验室间比对能力评定统计量的比较分析[J].中华放射医学与防护杂志,2025,45(6):573-578.Kong Shuying,Zhou Qiang,Tuo Fei,et al.Comparative analysis of statistical measures to assess the capability of the γ-ray spectroscopy of radionuclides for interlaboratory comparison[J].Chin J Radiol Med Prot,2025,45(6):573-578 |
| 放射性核素γ能谱检测实验室间比对能力评定统计量的比较分析 |
| Comparative analysis of statistical measures to assess the capability of the γ-ray spectroscopy of radionuclides for interlaboratory comparison |
| 投稿时间：2024-10-17 |
| DOI：10.3760/cma.j.cn112271-20241017-00402 |
| 中文关键词: 实验室比对 γ能谱 能力验证 评定统计量 |
| 英文关键词:Interlaboratory comparison γ-ray spectrum Capability verification Statistical measure for assessment |
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| 中文摘要: |
| 目的 通过对2020至2023年全国放射卫生技术机构的比对数据进行分析,探讨Z值、Z'值、Zeta(ζ)值和En值这几种关键统计量在比对能力评定中的适用性,为进一步完善全国放射性核素γ能谱能力验证比对评定方法提供参考。方法 基于中国疾病预防控制中心辐射防护与核安全医学所每年开展的全国范围内的放射性核素γ能谱测量分析比对工作,使用Z值、Z'值、Zeta(ζ)值、En值统计量衡量实验室γ能谱测量结果与指定值的偏差情况,对考核机构测量结果的合格率进行了评定分析。结果 结果显示,Z值的合格率在85%以上,但因其没有考虑不确定度的局限性,可能在某些情形下不够准确。Z'值由于考虑了指定值不确定度,结果更具科学性和代表性,其对不同实验室间比对评定合格率均在95%以上。在测量结果的不确定度较低时,Zeta(ζ)或En值的敏感性较高,合格率相对较低,表明其可能不能够全面地反映实验室间的比对结果。结论 能力评定统计量Z值、Z'值、Zeta值、En值在放射性核素γ能谱测量能力评定中各有优势和局限性。对于全国放射性核素γ能谱能力验证等涉及多个实验室和复杂测量条件的比对项目,可考虑将Z'值和Zeta或En值结合使用,以Z'值作为实验室检测能力"合格"结果的判定,以Zeta或En值作为检测能力为"优秀"结果的判定,以全面评定我国放射卫生技术机构γ能谱实验室的测量和分析能力。 |
| 英文摘要: |
| Objective To explore the applicability of critical statistical measures Z, Z', Zeta (ζ), and En value in comparative capability assessments by analyzing the data from nationwide radiological health technology institutions from 2020 to 2023, aiming to provide a reference for further improving China's comparative assessment method for verifying the γ-ray spectroscopy capability of radionuclides. Methods Based on the nationwide analysis and comparison of γ-ray spectroscopy of radionuclides conducted annually by the National Institute for Radiological Protection, China CDC, the deviations between laboratory result and reference values were determined using the above-mentioned four statistical measures. Finally, the qualification rates of the γ-ray spectroscopy result from relevant institutions were assessed and analyzed. Results The result indicate that the qualification rates of the Z value exceeded 85%, which might be inaccurate in some cases since it ignored the limitation of uncertainty. In contrast, the Z' value yielded more scientific and representative result because it considered the uncertainty of reference values, and the inter-laboratory comparison qualification rate is above 95%. In the case of low uncertainty of the γ-ray spectroscopy result, the Zeta (ζ) or En ratio exhibited relatively high sensitivity and, accordingly, relatively low qualification rates, indicating that this ratio may not comprehensively reflect the interlaboratory comparison result. Conclusions The Z, Z', Zeta (ζ), and En values demonstrate their own advantages and limitations in assessing the capability of the γ-ray spectroscopy of radionuclides. For comparison projects involving multiple laboratories and complex measurement conditions, such as the nationwide verification of the capabilities of the γ-ray spectroscopy of radionuclides, it is feasible to combine the Z' value with the Zeta (ζ) or En ratio, with the former and the latter used to determine the qualified and excellent capability result, respectively. This enables the comprehensive assessment of the measurement and analysis capabilities of the γ-ray spectroscopy laboratories of radiological health technology institutions in China. |
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