Preliminary Results on Brain Monitoring of Meningitis Using 16 Channels Magnetic In- Duction Tomography Measurement System

Magnetic induction tomography (MIT) is a contactless measurement technique of biological tissue conductivity. In this study, the differential induced voltage equations are shown in single layer and n layers models. The paper describes a 16 channels MIT measurement system with working frequency of 1MHz, which can image the plan of low conductivity object. According to physical experiments, the sensitivity is about 0.29◦/S · m−1, and the maximum shift of the phase noise is 0.08◦. Some preliminary clinical experiments were done, including 2 cases of meningitis and 5 cases of brain normal patients. The comparison of all the measured values shows that all values are smaller than 1.7◦ in the brain normal cases, but the values of meningitis cases are more than 2◦, higher than those of brain normal patients. Therefore, the MIT measurement system has great application prospect in dynamically monitoring the brain diseases.