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2009-2013年对天津市7家医院临床核医学工作人员外照射个人剂量监测结果进行分析,为制定和优化辐射防护策略提供依据。采用热释光法监测个人剂量当量Hp(10),并按不同工作岗位和医院等检测结果进行分类统计分析。结果显示,2009-2013年个人年有效剂量测量结果中位数分别为0.34、0.31、0.28、0.35和0.43mSv,其中医师年有效剂量中位数分别为0.40、0.36、0.29、0.30和0.40mSv,护士年有效剂量中位数分别为0.41、0.39、0.30、0.61和0.70mSv,技师年有效剂量中位数分别为0.27、0.25、0.24、0.36和0.38mSv。护士的年有效剂量值在2010、2012和2013年高于技师(P<0.05),在2012和2013年高于医师(P<0.05);技师的年有效剂量值在2012和2013年高于医师(P<0.05)。提示,所有工作人员年有效剂量都低于5mSv的管理目标值,但不同医院、不同岗位工作人员个人剂量存在差异,需针对重点医院和人员制定优化的防护措施。
From 2009 to 2013, the results of individual dose monitoring of clinical nuclear medicine staff in 7 hospitals in Tianjin were analyzed to provide the basis for the formulation and optimization of radiation protection strategies. Using thermoluminescence method to monitor individual dose equivalent Hp (10), and according to different jobs and hospitals and other test results for classification and statistical analysis. The results showed that the median annual effective dose measured in 2009-2013 was 0.34,0.31,0.28,0.35 and 0.43mSv, respectively. The median annual effective dose of physicians was 0.40, 0.36, 0.29, 0.30 and 0.40 mSv respectively, The median annual effective doses for nurses were 0.41, 0.39, 0.30, 0.61 and 0.70 mSv, respectively. The median annual effective doses of technicians were 0.27, 0.25, 0.24, 0.36 and 0.38 mSv, respectively. The annual effective dose values of nurses were higher than that of technicians (P <0.05) in 2010, 2012 and 2013, and higher than that of physicians in 2012 and 2013 (P <0.05). The annual effective dose of technicians was higher than that of physicians in 2012 and 2013 (P <0.05). It is suggested that the annual effective doses of all staff are lower than the management target of 5mSv. However, there are differences in the individual doses of staff in different hospitals and posts, and optimized protective measures should be formulated for key hospitals and personnel.