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目的分析近五年本区放射工作人员的外照射剂量水平,评价放射防护状况。方法汇总各工种放射工作人员外照射剂量监测结果,统计分析各工种放射工作人员受照剂量水平及其变化情况。结果医用X射线诊断、临床核医学、介入放射学、放射治疗和科研人员的人均年有效剂量分别为0.945 mSv.a-1、2.619 mSv.a-1、3.074 mSv.a-1、0.653 mSv.a-1和0.527 mSv.a-1,介入放射学和临床核医学放射工作人员的个人剂量高于其他工种放射工作人员的个人剂量,差别有统计学意义。五年间各工种放射工作人员的受照剂量水平之间差异无统计学意义。结论近五年来,徐汇区放射工作人员的外照射剂量水平基本保持稳定、均远低于国家标准规定的限值;介入放射学和核医学工作人员的防护仍需加强。
Objective To analyze the level of external radiation dose of radiation workers in the past five years and evaluate the status of radiation protection. Methods The monitoring results of the radiation dose of radiation workers of various types were summarized, and the dose levels and the changes of radiation workers were statistically analyzed. Results The annual average effective doses of medical X-ray diagnosis, clinical nuclear medicine, interventional radiology, radiotherapy and scientific research personnel were 0.945 mSv.a-1,2.619 mSv.a-1,3.074 mSv.a-1,0.653 mSv. a-1 and 0.527 mSv.a-1, respectively. The individual doses of radiation workers engaged in radiology and clinical nuclear medicine were higher than those of other types of radiographers, with statistically significant differences. There was no significant difference in the dose levels of radiographers of all trades in five years. Conclusions In the recent five years, the radiation dose level of radiation workers in Xuhui District remained basically stable, far below the limits stipulated by the national standards. The intervention of radiological and nuclear medicine workers still needs to be strengthened.