The In Vivo, Real Time Detection Of Dielectric Information Of Biological Tissues

The research in biodielectric physics reveals that the dielectric properties of different biological tissues vary from one to another and are with dispersions in different frequencies. Blood travels through tissues and organs with heart activities. Blood will take the room of other tissues and organs and rusult in the changes in dielectric properties in local part. The detection of this kinds of dielectric information is of importance both in basic medicine and clinic applicaition. In the past, the method to detect this dielectric information was not perfect. Research lacked of systematical work. Theoretic understanding was not deep. This paper primarily establishes the bipolar capacitance method which is capable of in vivo, real time detecting the dielectric information of biological tissues. The center of the system is ite high- resolution preamplified capacitance sensor. The analysis of the current density in the thorax using finite difference method supports that this method can measure the dielectric information deeply. The physical experiments with different dielectric material and devices further clarify the capability of the method to detect the dielectric information of the subject. The in vivo, real time measurement on heart and other organs reveals the activities of heart and organs detaily. The unique design of the sensor makes it suitable in the multi - channel measurement and the system has higher spacial resolution. With further research, the bipolar capacitance method may be used in the in vivo, real time detection of pump function of the heart and other dielectric information and supply with new tool for basic medicine and clinic application.