[2450兆赫兹下生物组织介电特性温度依赖性的实验研究]
[Experimental study on temperature dependence of dielectric properties of biological tissues at 2 450 MHz].
作者信息
Liu Hongxing, Cheng Yanyan, Zhang Meng, Tian Zhen, Nan Qun
机构信息
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.
出版信息
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2021 Aug 25;38(4):703-708. doi: 10.7507/1001-5515.202005027.
The temperature dependence of relative permittivity and conductivity of pig liver, lung and heart at 2 450 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.
研究了猪肝、肺和心脏在2450MHz下相对介电常数和电导率的温度依赖性。采用开口同轴线法测量了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了介电模型。结果表明，猪肝、猪肺和猪心的相对介电常数和电导率在20至80℃的组织温度范围内随温度升高而降低。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，为热消融温度场的参数设置提供参考。
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