Detection of temperature or construction-change distribution in the brain model by reconstructed images of permittivity and conductivity

The aim of this study is to image the temperature-change distribution in the human head using temperature dependency of permittivity. In this paper, whether it is possible to detect two kinds of information by measuring not only permittivity but also conductivity, that is, whether it is possible to decide permittivity-change caused by temperature-change or not is presented. As the experiment, reconstructed images of conductivity and permittivity were demonstrated. In two cases that temperature in the brain model was changed by the heater, and that the construction was changed by the inserted plaster which soaked up saline water, respectively. As a result, reconstruction of temperature- or construction-change distribution could be estimated by reconstructed images of conductivity and permittivity although each changed ratio in their images was insufficient. Therefore, the possibility of detection of two kinds of information by means of images of their distributions was shown with requirement that either temperature or construction was changed.