2017—2023年天津市某综合性三甲医院放射工作人员职业性外照射个人剂量监测结果分析

Analysis of individual dose monitoring results of occupational external exposure for radiation workers in a certain comprehensive tertiary hospital in Tianjin from 2017 to 2023

    摘要
  • 摘要:
    目的  分析2017—2023年天津市某综合性三甲医院放射工作人员职业性外照射个人剂量监测结果，确保其低于国家规定的限值，并且尽可能地将其控制在较低水平。
    方法  收集并分析2017—2023年天津市某综合性三甲医院放射工作人员职业性外照射的个人剂量监测数据，按照职业类别将监测的放射工作人员分为放射诊断学、核医学、放射治疗和介入放射学4类，评价不同年份、不同职业类别放射工作人员职业性外照射个人剂量监测结果。采用秩变换方差分析进行多组间总体上的比较，两两比较采用SNK检验。
    结果 2017—2023年该综合性三甲医院共监测2243人次，人均年有效剂量0.16（0.18） mSv低于国家标准限值（20 mSv）。2017—2023年各年人均年有效剂量间的差异有统计学意义（F=40.368，P<0.05），其中2020年最高0.24（0.13） mSv，2019年最低0.11（0.10） mSv。不同职业类别放射工作人员人均年有效剂量的差异有统计学意义（F=63.564，P<0.05），其中核医学放射工作人员最高0.35（0.61） mSv、介入放射学放射工作人员最低0.11（0.13） mSv。
    结论 天津市该综合性三甲医院放射工作人员的人均年有效剂量处于较低水平，未超国家规定的限值，应继续强化对放射工作人员个人剂量计和防护用品使用的常规检查。

     

    Abstract:
    Objective  To analyze the individual dose monitoring results of occupational external exposure for radiation workers in a certain comprehensive tertiary hospital in Tianjin from 2017 to 2023, ensuring that the dose is below the national limit and controlled at a lower level as much as possible.
    Methods  The individual dose monitoring data of occupational external exposure for radiation workers in a certain comprehensive tertiary hospital in Tianjin from 2017 to 2023 were collected and analyzed. The monitored radiation workers were divided into four groups in accordance with their occupational categories: diagnostic radiology, nuclear medicine, radiotherapy, and interventional radiology. The individual dose monitoring results of occupational external exposure for radiation workers in different years and occupational categories were evaluated. Rank transform analysis of variance was used for overall comparison among multiple groups, and SNK test was used for pairwise comparison.
    Results  A total of 2243 people were monitored in this comprehensive tertiary hospital in Tianjin from 2017 to 2023, and the average annual effective dose (0.16 (0.18) mSv) was lower than the national standard limit (20 mSv). A statistically significant difference was observed in the average annual effective dose from 2017 to 2023 (F=40.368, P<0.05), with the highest dose (0.24 (0.13) mSv) in 2020 and the lowest (0.11 (0.10) mSv) in 2019. A statistically significant difference was found in the average annual effective dose among radiation workers in different occupational categories (F=63.564, P<0.05), with nuclear medicine radiation workers having the highest (0.35 (0.61) mSv) and interventional radiology radiation workers having the lowest (0.11 (0.13) mSv).
    Conclusions  The average annual effective dose of radiation workers in this comprehensive tertiary hospital in Tianjin is at a relatively low level, and it does not exceed the national limit. Routine checks on the use of personal dosimeters and protective equipment by radiation workers should continue to be strengthened.

     

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