摘要
目的掌握医院放射工作人员外照射个人剂量水平,为职业辐射防护提供参考依据。方法以2014年1月～2017年12月医院放射工作人员外照射个人剂量值为分析对象,按照《电离辐射防护与辐射源安全基本标准》中的个人剂量限制为标准,依据《职业性外照射个人监测规范》的要求采用热释光方法,在工作时间连续监测全体放射工作人员外照射剂量,对不同工作场所的人员以工作地点为单位进行分组,比较外照射计量水平。结果放射工作人员4年集体剂量当量为179.12人·mSv,人均年有效剂量为0.44 mSv/年,低于5 mSv/年,其中98.27%的放射工作人员年有效剂量低于1 mSv/年;18类不同工作场所的放射工作人员中,4年人均年有效剂量最高的是CT室的工作人员,为0.48 mSv/年,其次是1号服务台的工作人员0.36 mSv/年,不同工作场所的工作人员年有效剂量存在较大差异。结论浙江省某医院医疗放射工作人员的放射防护条件良好,但放射工作人员的防护仍应值得重视,同时应加强放射工作人员的自我保护意识。
Objective To grasp the personal dose level of external radiation of hospital radiation workers, and provide reference for occupational radiation protection.Methods The personal doses of external radiation of hospital radiation workers from January 2014 to December 2017 were analyzed. According to the personal dose limit in "Basic Standards for Protection of Ionizing Radiation and Safety of Radiation Sources", according to "Occupational External Irradiation" The requirements of the Personal Monitoring Regulations adopt the thermoluminescence method to continuously monitor the external exposure dose of all radiation workers during working hours, and group the personnel in different workplaces according to the work place, and compare the external irradiation measurement levels.Results The 4-year collective dose equivalent of radiation workers was 179.12 personomSv, and the annual effective dose per capita was 0.44 mSv/year, which was lower than 5 mSv/year, of which 98.27% of the radiation workers had an annual effective dose of less than 1 mSv/year;Among the radiation workers in 18 different workplaces, the highest annual effective dose per capita for 4 years is the staff of the CT room, which is 0.48 mSv/year, followed by the staff of the No. 1 service desk, 0.36 mSv/year, at different workplaces. There is a large difference in the annual effective dose of the staff.Conclusion The radiation protection conditions of medical radiation workers in a hospital in Zhejiang Province are good, but the protection of radiation workers should still be worthy of attention. At the same time, the awareness of self-protection of radiation workers should be strengthened.
作者
苏锋
单国平
SU Feng;SHAN Guo-ping(Department of Radiotherapy Physics,Zhejiang Cancer Hospital,Hangzhou 310022,Zhejiang,China)
出处
《医学信息》
2019年第7期140-142,共3页
Journal of Medical Information
关键词
外照射
个人剂量
热释光
放射防护
有效剂量
放射工作人员
External exposure
Personal dose
Thermoluminescence
Radiation protection
Effective dose
Radiation workers
