2015—2017年云南省部分放射工作人员职业外照射个人剂量监测结果分析

目的 了解并分析2015-2017年云南省医学应用类放射工作人员职业性外照射个人剂量水平，为本省职业性放射性疾病的预防与控制提供科学指导。方法 按照《职业性外照射个人监测规范》（GBZ 128-2016）的方法，应用热释光个人剂量仪检测放射工作人员外照射的受照剂量，对监测结果进行统计和分析。结果 2015-2017年共监测医学应用类放射工作人员8 776人，人均年有效剂量为0.313 mSv/a，其中人均年有效剂量最高的职业类别是核医学（2C），为0.346 mSv/a；人均年有效剂量最高的年份是2017年，为0.388 mSv/a。利用SPSS进行组间比较，差异有统计学意义（P<0.001）。结论 云南省医学应用类放射工作人员受照剂量在国家规定的剂量限值内。建议将核医学（2C）工作人员的个人剂量监测作为重点，保护其职业健康。

Results and analysis on individual dose level of occupational external exposure to radiation for medical radiation workers in Yunnan in 2015-2017

Objective To understand and analyze the individual dose level of occupational external exposure of medical radiation workers in Yunnan province from 2015 to 2017 and to provide the data and scientific basis for the prevention and control of occupational radioactive disease in this province.Methods According to the methods of the Specifications for Individual Monitoring of Occupational External Exposure (GBZ 128-2016), the Thermoluminescent Dosimeter(TLD) System was used to detect the external exposure dose of medical radiation workers, and the individual dose monitoring results were collected and analyzed statistically.Results 8,776 radiological works were monitored from 2015 to 2017. The average annual individual effective dose was 0.313 mSv/a, among which the occupational category with the highest annual effective dose was nuclear medicine (2C) and the highest value 0.388 mSv/a was found in 2017. SPSS was used for comparison between groups, and the difference was statistically significant (P<0.001).Conclusion The average annual individual effective dose of radiation workers in medical system in Yunnan is within the dose limit of the national standards. To protect their occupational health, it is recommended that the individual monitoring of external exposure for nuclear medicine(2C) staff be given priority.