Using Polynomial Curve Fitting Method to Improve Image Quality in EIT

The polynomial curve fitting (PCF) method is used firstly on electrical impedance tomography (EIT) to find out the polynomial function of boundary potential distribution according to the measured data in this work. The potential values calculated from the polynomial function can be regarded as measured data. So enough data can be provided to satisfy the requirements of various algorithms. The potential distribution within the domain is obtained approximately according to the equi-potential property. Without adding the electrode number and changing data collection strategy, more data can be obtained and regarded as measured data by using the PCF method. With these enough data, the quality of reconstructed image is improved obviously