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机构地区:[1]成都市疾病预防控制中心,四川成都610041
出 处:《预防医学情报杂志》2016年第5期465-467,共3页Journal of Preventive Medicine Information
摘 要:目的了解成都市乡镇卫生院更换数字化医用X射线摄影系统(digital radiology,DR)前后放射工作人员个人放射剂量水平,探讨更换DR并改造机房防护对工作人员的防护效果。方法 2011-2014年对618人更换DR前后分别有2年时间的放射工作从业人员进入监测队列。采用热释光剂量测量方法对放射工作人员进行监测,用SPSS 18.0进行数据分析。结果 2012年和2013年分别有145家和271家乡镇卫生院更换DR并对机房进行防护改造,涉及工作人员618名,更换前放射工作人员的年人均剂量的中位数为0.485 m Sv/a,年集体剂量为1.19人·Sv,年有效剂量小于5 m Sv/a的人员有598人(96.76%),有17人(2.75%)的剂量在5 m Sv/a到20 m Sv/a,有2人(0.32%)的剂量超过20 m Sv/a,无人员超过年50 m Sv/a国家标准规定放射工作人员年剂量限值。更换后放射工作人员的年人均剂量的中位数为0.430 m Sv/a,年集体剂量为1.02人·Sv,年有效剂量小于5 m Sv/a的人员有603人(97.57%),有9人(1.46%)的剂量在5 m Sv/a到20 m Sv/a,有5人(0.81%)的剂量超过20 m Sv/a,无人员超过年50 m Sv/a国家标准规定放射工作人员年剂量限值。结论成都市乡镇卫生院更换DR并改造机房防护后放射工作人员个人放射剂量水平有所降低。Objective To investigate the individual dose radiation in Chengdu township health centers after the replacement of Digital Radiography System( DR),and explore the protection effect after DR replacement and equipment room improvement. Methods A total of 618 radiation workers who worked for two years after the DR replacement were selected into the monitoring cohort during 2011- 2014. Thermoluminescent dosimetry was adopted to monitor external radiation doses. The data was analyzed in the SPSS 18. 0. Results In 2012 and2013,there were 145 and 271 township health centers which replaced DR and improved the their equipment room. Before the replacement,the median of average annual dose was 0. 485 m Sv / a; collective annual dose was 1. 19 man·Sv / a; there were 5 998(96. 76%) radiation workers with the average annual dose less than 5m Sv / a,17(2. 75%) workers during 5 m Sv / a to 20 m Sv / a and 2(0. 32%) workers in more than 20 m Sv / a.No worker was over the national standard limitation of 50 m Sv / a. Conclusion After the DR replacement and equipment room improvement,the individual radiation dose level was decreased significantly.
分 类 号:R144.1[医药卫生—公共卫生与预防医学]
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