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Dielectric analysis of heterogeneous biological tissues based on mixing rule

Issue title: Frontiers in Biomedical Engineering and Biotechnology – Proceedings of the 4th International Conference on Biomedical Engineering and Biotechnology, 18–21 August 2015, Shanghai, China

Guest editors: Feng Liu, Dong-Hoon Lee, Ricardo Lagoa and Sandeep Kumar

Article type: Research Article

Authors: Zhang, Lianga | Liu, Peiguob | Dong, Xiuzhenc | Zhou, Dongmingb; * | Shi, Xuetaoc; *

Affiliations: [a] College of Science, National University of Defense Technology, Changsha, Hunan 410073, P.R. China | [b] College of Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, P.R. China | [c] Faculty of Biomedical Engineering, Fourth Military Medical University, Xi’an, Shaanxi, 710032, P.R. China

Correspondence: [*] Address for correspondence: Dongming Zhou, College of Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, P.R. China. Tel.: (0731)84576219; Fax: 0731-84518730; E-mail: dmzhou@nudt.edu.cn. Xuetao Shi, Faculty of Biomedical Engineering, Fourth Military Medical University, Xi’an, Shaanxi, 710032, P.R. China. Tel.: (029)84776397; Fax: 029-84776397; E-mail: shixuetao@fmmu.edu.cn.

Note: [1] Dongming Zhou and Xuetao Shi contributed equally to this work.

Keywords: Dielectric properties, heterogeneous biological tissues, mixing rule, effective volume fraction

DOI: 10.3233/BME-151333

Journal: Bio-Medical Materials and Engineering, vol. 26, no. s1, pp. S439-S445, 2015

Published: 2015
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Thus far, the measurement of dielectric properties of biological tissues has been achieved on the assumption that the biological tissues are homogeneous. In fact, most tissues should be heterogeneous because there are many small structures included in these tissues, such as blood vessel, nerve fiber and so on. When the dielectric properties of these tissues are measured by conventional sensor, the results are not the dielectric properties of tissues but the effective dielectric properties of the mixture. In this paper, the influence of the inclusion in tissues on the measurement of dielectric properties of heterogeneous biological tissues is studied and the analysis of the effective dielectric properties of heterogeneous tissues based on the mixing rule is proposed. When the coaxial probe is used to measure the dielectric properties of tissue, the results are relative to the dielectric properties of inclusion, dielectric properties of background tissue and the effective volume fraction of inclusion. Therefore, the dielectric properties of inclusion could be calculated according to mixing rule, after the effective dielectric properties are measured and the effective volume fraction of inclusion is estimated.

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