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Development of a Tissue Dielectric Properties Model Based on Maxwell-Fricke Mixture Theory

机译:基于麦克斯韦-弗里克混合理论的组织介电特性模型的建立

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We propose a dielectric tissue property model dependent on both water and air content covering the microwave frequency range. Water is the largest constituent of biological tissues and its effect on dielectric properties of biological tissue has been studied. However, dehydration effects due to thermal heating on dielectric properties has not been fully characterized in liver. We combined Maxwell-Fricke mixture theory with a four-pole Cole-Cole model to include water and air content dependency. The proposed model was able to predict the permittivity (ε’) and conductivity (a) of bovine liver and swine lung tissues at different hydration states from 1–15 GHz with less than 10% mean percentage error. Such a model would be useful in the development of microwave imaging and thermal ablation technologies.
机译:我们提出了一种介电组织特性模型,该模型取决于覆盖微波频率范围的水和空气含量。水是生物组织的最大成分,并且已经研究了其对生物组织的介电性能的影响。然而,肝中尚未充分表征由于热加热而引起的脱水作用对介电性能的影响。我们将Maxwell-Fricke混合理论与四极Cole-Cole模型相结合,以包括对水和空气含量的依赖性。所提出的模型能够在1-15 GHz的不同水合作用状态下预测牛肝和猪肺组织的介电常数(ε')和电导率(a),平均百分比误差小于10%。这样的模型在微波成像和热消融技术的发展中将是有用的。

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