一起介入手术过量照射事件中术者关键组织器官吸收剂量和有效剂量的蒙特卡罗估算  

Monte Carlo-based estimation of absorbed dose and effective dose to critical tissues and organs of operators in the overexposure incident during an interventional procedure

作　　者：尹禹臣 王轩 许文星 白小雨 涂彧[1] 张冰洁 孙亮[1] Yin Yuchen;Wang Xuan;Xu Wenxing;Bai Xiaoyu;Tu Yu;Zhang Bingjie;Sun Liang(State Key Laboratory of Radiation Medicine and Protection,School of Radiation Medicine and Protection,Soochow University,Suzhou 215123,China;Prevention and Treatment Center for Occupational Disease of Xinxiang City,Xinxiang 453003,China)

机构地区：[1]苏州大学放射医学与防护学院放射医学与辐射防护国家重点实验室,苏州215123 [2]新乡市职业病防治研究所,新乡453003

出　　处：《中华放射医学与防护杂志》2024年第8期688-692,共5页Chinese Journal of Radiological Medicine and Protection

摘　　要：目的 使用蒙特卡罗方法对一起介入手术过量照射事件中两名术者的组织器官剂量和有效剂量进行估算。方法 基于国际放射防护委员会(ICRP)145号报告的成人网格型参考计算体模(MRCPs)和体模变形技术构建术者模型和前期工作中构建的患者模型,根据现场设备和照射条件构建实际照射场景模型,使用蒙特卡罗模拟方法评估术者眼晶状体、甲状腺等关键组织和器官的吸收剂量和全身有效剂量。结果 在本次事件特定曝光条件下,两名术者主要器官的最大吸收剂量均产生在左眼晶状体,分别为1.216和0.223 mGy,甲状腺吸收剂量分别为0.074和0.019 mGy,两术者有效剂量分别为0.088和0.021 mSv。穿戴铅衣和铅围脖时两术者有效剂量降低率分别为67.16%和78.79%。结论 结合蒙特卡罗方法和人体曲面模型可较高程度还原某一特定照射场景,用于估算受照人员的物理剂量。Objective To estimate tissue/organ doses and effective dose to operators in the overexposure incident during an interventional procedure using Monte Carlo method. Methods The phantoms were constructed for both the operators and the patient based on the adult mesh-type reference computational phantoms (MRCPs) recommended by the International Commission on Radiological Protection (ICRP) Publication 145 and phantom deformation technology. Models of exposure scenario were constructed based on the on-site equipment and the irradiation conditions. The Monte Carlod simulation method was used to evaluate the absorbed dose to critical tissues and organs, such as the operator's eye lens and thyroid, as well as the effective dose. Results In the particular exposure conditions, the maximum absorbed doses in the primary organs of the two operators were in the left eye lens, with doses of 1.216 and 0.223 mGy, respectively. The thyroid absorbed doses were 0.074 and 0.019 mGy, while the effective doses to the two operators were 0.088 and 0.021 mSv, respectively. The reduction rates of effective dose for the two operators when wearing lead aprons and lead thyroid collars were 67.16% and 78.79%, respectively. Conclusions The combination of Monte Carlo method and MRCPs can be used to restore a specific irradiation scenario to a high degree and to estimate the physical dose of to the irradiated persons.

关 键 词：介入治疗 器官剂量 蒙特卡罗 

分 类 号：R817.5[医药卫生—影像医学与核医学]