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在无个人剂量监测数据情况下,利用用人单位提供的一名放射工作人员的工作量,估算个人剂量计位置处的累积皮肤剂量,并结合部分年份的个人剂量结果,计算该名放射工作人员患甲状腺癌来自于职业照射的病因概率。结果显示,Ck T/Ck P取0.870时,该患者1980—2010年期间估算的甲状腺吸收剂量为43.71 c Gy(其中由1988年和1989年的肺结核普查工作估算的甲状腺吸收剂量均为18.07 c Gy/年),2010—2014年期间由个人剂量结果换算的甲状腺吸收剂量约为0.167 c Gy。依据《放射性肿瘤病因判断标准》(GBZ 97—2009),该患者95%可信上限PC值为71.2%,可判断为职业性放射性肿瘤。提示用人单位应加强放射工作人员的职业健康监护,提高放射工作人员自身防护意识,有效控制职业病危害的发生。
In the absence of personal dose monitoring data, the cumulative dermatological dose at the individual dosimeter location was estimated using the workload of a radiological staff member provided by the employer and, in combination with the individual dose results for some years, the radiological staff member Thyroid cancer comes from the probability of occupational exposure. The results showed that the estimated dose of thyroid uptake from 1980 to 2010 was 43.71 c Gy at a Ck T / Ck P of 0.870 (of which thyroid uptake was estimated at 18.07 c Gy from the 1988 and 1989 tuberculosis census work) / Year), the thyroid uptake dose converted from individual dose results during 2010-2014 is about 0.167 c Gy. According to “Criteria for Determining Radiation Oncology” (GBZ 97-2009), the 95% confidence limit PC value of this patient was 71.2%, which could be judged as occupational radioactive tumor. It is suggested that employers should strengthen the occupational health supervision of radiation workers, raise the awareness of radiation workers on their own protection and effectively control the occurrence of occupational diseases and hazards.