RECONSTRUCTION OF INHOMOGENEOUS PERMITTIVITY DISTRIBUTION IN BRAIN PHANTOM USING A NEW CAPACITANCE MEASUREMENT METHOD

The goal of this study is to establish an imaging system of the temper ature-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 ele ctrodes attached to the head. Using these data, the images of the perm ittivity distribution are generated by a reconstruction algorithm. The altered distribution is replaced with the temperature-change distribu tion based on the temperature-permittivity characteristic of each tiss ue. First, a capacitance measurement method using a pair of detecting electrodes with various combinations of supplementary electrodes was p roposed. In this paper, we describe a two-dimensional image of the inh omogeneous permittivity distribution. constructed by using a brain pha ntom 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 dis tribution using the proposed method is presented. and some problems in the reconstructed results are also discussed.