2008-2010年呼和浩特市医疗机构放射工作人员外照射个人剂量监测结果分析

2008-2010 Hohhot is a medical radiation workers External Exposure Dose External radiation personal dose monitoring results

目的分析2008-2010年呼和浩特市属医疗机构放射工作人员外照射个人剂量水平及动态变化。方法采用热释光剂量计法,年检测4次每季度一次。结果三年共检测市属9个旗县区医疗机构254家单位,检测放射工作人员618人次。集体剂量当量为1 716.44mSv。人均年剂量当量为2.77mSv/a,96.7%的放射工作人员剂量当量低于年限制(20mSv/a)的1/4,没有超过国家年限制20mSv的情况。2008-2009年人均年剂量当量呈下降趋势,而2010年人均年剂量当量高于前两年。不同类型的医疗单位放射工作人员人均年剂量当量不同,市级医疗机构较县级、私立医疗机构偏高。结论呼浩特市医疗机构放射工作人员年剂量均小于国家限值20mSv/a,总体防护状况良好。但市级公立级医疗机构放射工作人员人均年剂量当量相对偏高,重视放射防护安全问题,并查找公立医疗机构放工人员个人剂量偏高原因。

Objective In 2008-2010 Hohhot is a medical rddiation workers of the External Dose level and dynamics. Methods thermoluminescence dosimeter method, test 4 times in each quarter. Results were detected in three area municipal medical institutions Qixian 9 254 units, detection of radiation workers 618 people. Collective dose equivalent to 1716.44 roSy. Average annual dose equivalent to 2.77mSv/a, 96.7% of the radiation workers less than the annual dose equivalent limit （20mSv/a） 1/4, did not exceed the limit 20roSy in the case of the State. 2008-2009 average annual dose equivalent decreased, while the average annual close equivalent in 2010 than the previous two years. Medical units of different types of radiation close equivalent workers per capita is different than the county level and municipal medical institutions, private medical institutions is high. Conclusion call Haute City medical institutions, the annual dose of radiation workers are less than the national limit of 20 mSv/a.the overall protection in good condition. But the municipal-level medical institutions, public radiation dose equivalent staff per capita is relatively high, attention to radiological protection security issues, and look for public sector workers after work on Higher Dose.