论文部分内容阅读
获得外照射条件下动物的器官剂量,为生物效应评价、剂量-效应关系研究提供准确的剂量信息和依据,是近年来辐射生物效应研究的热点.本文基于建立的一个质量为26.9g的小鼠体素模型(体素精度为0.2mm×0.2mm×0.2mm,体素数量为9424000),利用蒙特卡罗方法计算了5种照射几何条件(左侧向、右侧向、腹背向、背腹向和各向同性)下,中子能量为10-9～20MeV共37个能量点的小鼠器官剂量转换系数,基于此套数据,在照射条件已知情况下,可以获得小鼠的器官剂量;分析讨论了照射几何条件、中子能量及器官的位置对小鼠器官剂量的影响.
Obtaining organ dose of animal under external irradiation provides the accurate dose information and basis for the study of biological effect and dose-effect relationship, which is a hot spot in the research of radiation biological effect in recent years.In this paper, based on the established mice with a mass of 26.9g The voxel models (voxel accuracy 0.2 mm × 0.2 mm × 0.2 mm and voxel number 9424000) were used to calculate the five illumination geometries (left lateral, right lateral, dorsoventral, dorsoventral And isotropy), the energy conversion coefficient of mice organs with neutron energy of 37-9 energy points of 10-9 ~ 20MeV, based on this set of data, the organ dose can be obtained under the known irradiation conditions The effects of irradiation geometry, neutron energy and the position of the organ on the organ dose in mice were analyzed and discussed.