郑州市某医疗机构放射工作人员外照射个人剂量水平调查

目的 调查医疗机构放射工作人员职业外照射个人剂量水平。 方法 选择郑州市职业病防治院介入放射、核医学、放射治疗和放射影像诊断科工作人员,按所在的科室分为4组,对2008-2012年职业外照射个人剂量水平进行检测并作分析。 结果 从事放射工作人员的人均年有效剂量没有超过国家限值,2008-2012年该医疗机构放射工作人员年均个人有效剂量中位数分别为0.46、0.35、0.32、0.28、0.26 mSv/a,有逐年下降的趋势(r=10.38,P < 0.05);不同岗位工作人员年均有效剂量值不同,其中介入放射岗位个人剂量水平高于其他3组(t=0.876、0.532、0.728,P < 0.05)。 结论 该医疗机构介入放射工作人员人均有效剂量较高,应加强对从事放射工作人员,尤其是对介入放射学工作人员的放射防护和防护知识的培训。

Investigation on personal radiation doses of medical radiation staff in a hospital in Zhengzhou

Objective To understand the personal radiation doses of medical radiation staff in a hospital in Zhengzhou. Method The personal radiation doses of staff in the departments of radiological intervention,nuclear medicine,radiation therapy and radiation image were measured using the thermoluminescence dosimetry four times a year during 2008-2012. Results The results showed that the annual average personal effective radiation doses of these staff were lower than the national OELs and there was a yearly decreased trend during 2008-2012(r=10.38, P < 0.05),and the median of annual average personal doses was 0.46,0.35,0.32,0.28,0.26 mSv/a,respectively. The staff in the department of radiological intervention had highest dose values compared with other three groups of staff (t=0.876,0.532,0.728; P < 0.05). Conclusion Though the personal radiation doses of medical radiation staff in this hospital were lower than the national OELs,more attention should still be given to the staff engaged in the radiological intervention,who had a highest exposure within the hospital.