摘要
目前微波生物效应研究中通常采用比吸收率(SAR)作为剂量学量来表征剂量效应关系,定义为每单位质量生物组织单位时间内吸收的电磁能量。对于动物或细胞照射,SAR可采用测量的方法来获得,如能差法、量热法、测温法、测电场法等,但人体内部的SAR分布,尤其是敏感器官的SAR目前尚难以直接测量,因此通常采用模拟计算的方法。本文利用基于FDTD算法的电磁仿真软件Sim4Life和人体电磁模型,计算并比较了P-X频段正向和背向照射情况下人体及周边电场分布,并根据各器官电导率及密度计算了各器官剂量,为P-X频段微波生物效应的研究和防护提供剂量学参考数据。
At present,in the study of microwave biological effects,the specific absorption rate(SAR)is usually used as a dosimetric quantity to characterize the dose-effect relationship,which is defined as the electromagnetic energy absorbed per unit mass of biological tissue per unit time.For animal or cell irradiation,SAR can be obtained by measuring methods,such as energy difference method,calorimetric method,temperature measurement method,electric field measurement method,etc.But the distribution of SAR in human body,especially the SAR of sensitive organs,is difficult to measure directly,so the simulation calculation method is usually used.In this paper,the electromagnetic simulation software Sim4 Life based on FDTD algorithm and the electromagnetic model of human body are used to calculate to compare the electric field distribution of human body in P-X bands,and the dose of each organ is calculated according to the conductivity and density,which provides dosimetric reference data for the research and protection of microwave biological effect in P-X bands.
作者
赵雪龙
王长振
周红梅
董国福
刘琦
ZHAO Xue-long;WANG Chang-zhen;ZHOU Hong-mei;DONG Guo-fu;LIU Qi(Institute of Radiation Medicine,Academy of Military Medical Sciences,Beijing 100850,China)
出处
《微波学报》
CSCD
北大核心
2020年第S01期420-423,共4页
Journal of Microwaves
基金
北京市自然科学基金(4194097)
关键词
复杂电磁环境
频段
电磁仿真
剂量学
complex electromagnetic environment
frequency band
electromagnetic simulation
dosimetry
作者简介
赵雪龙,男,1987年生,助理研究员,博士。主要研究方向:微波传输与发射技术、电磁生物效应。E-mail:xlong_z@163.com
