Reconstruction of Inhomogeneous Permittivity Distribution in Brain Phantom Using a New Capacitance Measurement Method

概要

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The goal of this study is to establish an imaging system of the temperature-change distribution inside the human head based on our proposed noninvasive capacitance measurement method. In our method, capacitance, which is dependent on permittivity, is measured using many small electrodes attached to the head. Using these data, the images of the permittivity distribution are generated by a reconstruction algorithm. The altered distribution is replaced with the temperature-change distribution based on the temperature-permittivity characteristic of each tissue. First, a capacitance measurement method using a pair of detecting electrodes with various combinations of supplementary electrodes was proposed. In this paper, we describe a two-dimensional image of the inhomogeneous permittivity distribution, constructed by using a brain phantom and agar and applying the data measured using the proposed method to the regularization method utilized as the reconstruction algorithm. The possibility of reconstructing the inhomogeneous permittivity distribution using the proposed method is presented, and some problems in the reconstructed results are also discussed.
社団法人応用物理学会の論文
1998-09-15