摘要
目的了解滦南县放射工作人员外照射个人剂量水平及放射诊疗设备现状,为评价放射工作场所防护现状提供依据。方法按照《职业性外照射个人监测规范》(GBZ 128-2016)的要求,采用热释光剂量法对滦南县所有医疗卫生机构放射工作人员外照射进行监测。结果滦南县共有放射诊疗单位30家,放射工作人员146人,实际监测人员131人,监测率89. 73%。131人的集体年剂量当量为51. 97 m Sv人,人均年剂量当量为0. 40 m Sv。其中128人年剂量当量低于2 m Sv,3人年剂量当量在2～5 m Sv之间,占2. 29%,年剂量当量值均无超过5 m Sv。县级医院人均年剂量当量为0. 36 m Sv,乡镇级医院人均年剂量当量为0. 44 m Sv,牙科门诊人均年剂量当量为0. 34 m Sv,个体诊所人均年剂量当量为0. 31 m Sv。放射工作人员中以普通放射工作人员为主,共计97人,占74. 05%,人均年剂量当量0. 38 m Sv;从事CT人员19人,人均年剂量当量0. 50 m Sv;从事介入人员9人,人均年剂量当量0. 24 m Sv;专职牙科人员4人,人均年剂量当量0. 34 m Sv;放射治疗2人,人均年剂量当量1. 04 m Sv。经比较,放射治疗与其他放射工种的人均年剂量当量差异有统计学意义(P <0. 05)。结论全县放射工作人员人均年有效剂量均远远低于国家标准限值,表明放射职业环境相对安全。
Objective To investigate the individual external radiation dose level of radiation staff and the status of radiological diagnosis and treatment equipment in Luannan County,andto provide basis evidence for evaluating the current radiation protection situation in workplace. Methods According to the requirements of the "Specifications for individual monitoring of occupational external exposure"( GBZ 128-2016),dose level of occupational external exposure of all medical and health institutions in Luannan county were measured by thermoluminescence dose method. Results There are 30 radiological diagnosis and treatment units and 146 radiological staff in luannan county. 131 people among the staff were monitored and the monitoring rate was 89. 73%. The collective annual dose equivalent was 51. 97 m Sv,and the average annual dose equivalent was0. 40 m Sv. Among the staff,the annual dose equivalent of 128 was less than 2 m Sv/person,and the annual dose equivalent of other 3 people was between 2 ~ 5 m Sv,accounting for 2. 29%,the annual dose of all the people was less than 5 m Sv. About average annual dose equivalent,it was 0. 36 m Sv in the county hospital,and 0. 44 m Sv in the township hospita and 0. 34 m Sv in the dental clinic and 0. 31 m Sv in the individual clinic. Among the radiation staff,mainly the general staff,were 97,accounting for 74. 05%,and the average annual dose equivalent was 0. 38 m Sv;19 people were engaged in the CT and their average annual dose equivalent was 0. 50 m Sv;9 people were engaged in interventional radiology and the average annual dose equivalent was 0. 24 m Sv;4 full-time dental staff and their average annual dose equivalent was 0. 34 m Sv;2 radiation therapy staff and their average annual dose equivalent was 1. 04 m Sv;By comparison,the difference in average annual dose equivalent between radiotherapy and other radiological staff was statistically significant( P < 0. 05). Conclusion The average annual effective dose of radiation staff in the county is far lower than the national standard limit,which indicates the radiation workplace environment is relatively safe.
作者
马恩红
王春波
方玉梅
郑叶昆
MA Enhong;WANG Chunbo;FANG Yumei;ZHENG Yekun(Luannan County Center for Disease Control and prevention,Luannan 063500 China)
出处
《中国辐射卫生》
2018年第5期449-451,454,共4页
Chinese Journal of Radiological Health
关键词
放射工作人员
放射诊疗
外照射
个人剂量
Radiation Staff
Radiation Clinic
External Irradiation
Individual Dose
