2450 MHz下生物组织介电特性的温度依赖性实验  

Experimental study on temperature dependence of dielectric properties of biological tissues at 2450 MHz

作　　者：刘洪兴 程妍妍 张萌[1] 田甄[1] 南群[1] LIU Hongxing;CHENG Yanyan;ZHANG Meng;TIAN Zhen;NAN Qun(College of Life Science and Chemistry,The Faculty of Environment and Life Science,Beijing University of Technology,Intelligent Physiological Measurement and Clinical Translation,Beijing International Base for Scientific and Technological Cooperation,Beijing 100124,P.R.China)

机构地区：[1]北京工业大学,环境与生命学部,生命科学与化学学院,智能化生理测量与临床转化北京市国际科研合作基地,北京100124

出　　处：《生物医学工程学杂志》2021年第4期703-708,共6页Journal of Biomedical Engineering

基　　金：国家自然科学基金(31771021,11832003);北京市自然科学基金(3162006);江苏省科技基金(BE2017758)。

摘　　要：研究2450 MHz频率下,离体猪肝、猪肺和猪心的相对介电常数和电导率随温度的变化规律。采用开端同轴线法测量三种生物组织的相对介电常数和电导率,根据最小二乘法原理拟合介电模型,结果表明,随着组织温度从20℃升高到80℃,猪肝、猪肺和猪心的相对介电常数和电导率均随之降低。并据此建立了猪肝、猪肺和猪心的相对介电常数和电导率模型,以反映生物组织介电特性随温度变化的规律,为热消融温度场参数设置提供参考。The temperature dependence of relative permittivity and conductivity of ex-vivo pig liver,lung and heart at 2450 MHz was studied.The relative permittivity and conductivity of three kinds of biological tissues were measured by the open-end coaxial line method.The dielectric model was fitted according to the principle of least square method.The results showed that the relative permittivity and conductivity of pig liver,pig lung and pig heart decreased with the increase of tissue temperature from 20 to 80℃.The relative permittivity and conductivity models of pig liver,pig lung and pig heart were established to reflect the law of dielectric properties of biological tissue changing with temperature and provide a reference for the parameters setting of thermal ablation temperature field.

关 键 词：生物组织 介电特性 温度依赖性 介电模型 热消融 

分 类 号：R318[医药卫生—生物医学工程]