个人剂量监测中异常结果的调查与分析

目的 对2014—2017年本实验室个人剂量监测过程中出现的异常结果进行调查与原因分析。方法 放射工作人员佩戴热释光个人剂量计监测个人剂量当量H_P(10)，对测量结果超过调查水平的进行统计分析。结果 2014—2017年，本实验室共出现40个单位69人次个人剂量监测结果异常，其中从事诊断放射学的占83%；剂量结果在1.25～5.00 mSv占54%；导致剂量结果异常的主要原因有剂量计佩戴不规范（67%）、原因不明（20%）、工作量增加（10%）和设备维修（占3.0%）等。结论 加强放射工作单位对放射工作人员的管理及放射防护培训，提高个人防护意识。

Investigation and analysis of abnormal results in personal dose monitoring

Objective To investigate and analyze the cause of the abnormal results in the individual dose monitoring conducted by this laboratory from 2014 to 2017.Methods Radiologic workers wear personal thermoluminescent dosimeters to monitor the individual dose equivalent H_P(10). A statistical analysis is conducted on the results above the investigation level.Results During the time when our individual dose monitoring was conducted from 2014 to 2017, this laboratory had detected 69 person-time abnormal results in 40 workplaces, of which 83% occurred in the profession of diagnostic roentgenology. 54% of the dose level range from 1.25 to 5.00 mSv. The main causes of the abnormal results include improper wearing of personal dosimeters (67%), unknown causes (20%), increased workload (10%) and equipment maintenance (3.0%)etc.Conclusion Radiation workplaces should enhance the management of radiologic workers, improve their trainings on radiation protection and raise their protection awareness.