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Research on Magnetic Detection Electrical Impedance Tomography System Based on Scanning Platform

The purpose of this research is to design and build a data acquisition system for magnetic detection electrical impedance tomography, optimize the weak magnetic field detection method and improve the detection accuracy, provide the measured magnetic flux density data to test the conductivity reconstruction algorithm and apply this system to detect the anomaly in an object. The measurement system is divided into hardware module and software module. First, the overall diagram of the system is given, and then each component of hardware is explained. The software is developed in the LabVIEW environment. The various parameters are easily modified by the control panel, and the experimental data is obtained and stored automatically by the software. The system's acquisition resolution can reach 10-9T according to the verification, which meets the needs of use in biomedical signal measurement. In order to verify the feasibility of the system, a phantom experiment was conducted. By applying the reconstruction algorithm to the acquired data for reconstruction, the distribution of the anomaly can be clearly distinguished based on the reconstructed conductivity distribution map, the experiment shows that the system is practical and feasible.