介入治疗第一术者眼晶状体受照剂量蒙特卡罗模拟与分析  

Monte Carlo simulation and analysis of eye lens dose of the first operator in interventional therapy

作　　者：范胜男 谢芹[2] 李梦雪 许潇 邓君[1] FAN Shengnan;XIE Qin;LI Mengxue;XU Xiao;DENG Jun(National Institute for Radiological Protection,Chinese Center for Disease Control and Prevention,Beijing 100088 China;University of South China,Hengyang 421000 China;Inner Mongolia Comprehensive Disease Prevention and Control Center,Hohhot 010000 China)

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所,北京100088 [2]南华大学,湖南衡阳421000 [3]内蒙古综合疾病预防控制中心,内蒙古呼和浩特010000

出　　处：《中国辐射卫生》2023年第6期597-602,610,共7页Chinese Journal of Radiological Health

摘　　要：目的 基于蒙特卡罗(Monte Carlo, MC)模拟方法,建立介入治疗中第一术者眼晶状体受照剂量估算模型,为介入治疗中放射工作人员眼晶状体剂量快速、准确评价提供科学依据。方法 基于MIRD体模和中国成年男性眼部模型,运用MCNPX蒙特卡罗模拟程序,建立物理模型,计算辐射场分布和第一术者眼晶状体受照剂量。采用GR200A型LiF(Mg、Cu、P)热释光剂量计进行实验测量,验证模拟结果。结果 蒙特卡罗模拟及实验测量结果表明,空间辐射场分布呈对称分布。第一术者眼晶状体受照剂量模拟结果与实测结果相比,误差分布于-8.3%~7.3%。左侧眼晶状体受照剂量高于右侧。结论 本研究所建MC模型初步实现了介入手术中第一术者的眼晶状体受照剂量的模拟计算。在今后的工作中,将结合实际手术过程,基于曝光时间、管电压、管电流、投射方向等照射参数,进一步优化模型,从而更准确地评价介入放射工作人员眼晶状体受照剂量。Objective To establish a model for estimating the eye lens dose of the first operator in interventional therapy based on the Monte Carlo simulation,and to provide a scientific basis for the rapid and accurate evaluation of the eye lens dose for radiation workers in interventional therapy.Methods Based on the MIRD phantom and eye model for adult Chinese males,the MCNPX program was used to establish the physical model to calculate the spatial distribution of radiation field and eye lens dose for the first operator.A GR200 Type A LiF(Mg,Cu,P)thermoluminescence dosimeter was used for experimental measurement to verify the simulation results.Results Monte Carlo simulation and experimental measurements showed that the spatial distribution of radiation field was symmetrical.Compared with the measured doses,the errors of the simulated eye lens dose of the first operator were between−8.3%and 7.3%.The dose of the left eye lens was higher than that of the right eye.Conclusion The Monte Carlo model constructed in this study initially realizes the simulation of eye lens dose of the first operator in interventional therapy.In the future,the model will be further optimized based on irradiation parameters such as exposure time,tube voltage,tube current,and projection direction used in clinic practice,so as to more accurately evaluate the eye lens dose of interventional therapy staff.

关 键 词：介入放射工作人员 眼晶状体受照剂量 蒙特卡罗模拟 

分 类 号：X591[环境科学与工程—环境工程]