A Rapid, and Low-Cost Electrical Impedance Tomography Sensor System for Non-Destructive Evaluation of Multiple Inhomogeneities

Image reconstruction of the inhomogeneities is very important to evaluate the characteristics by creating multidimensional images using non-destructive measurements. The reconstructed image with the lowest possible noise is desirable in order to maintain a good resolution and high accuracy. This paper presents an approach to reconstruct and evaluate the multiple inhomogeneities by utilizing non-invasive and non-destructive measurements considering an Electrical Impedance Tomography $(\text{EIT})$ sensor system. A high-precision sensor using an array of electrodes in a cylindrical structured domain is designed for multidimensional measurements of non-conductive, bio-, and conductive inhomogeneities. The impedances at frequencies up to 100 $\text{kHz}$ are measured and the accuracy is evaluated. The reconstruction analysis is performed successfully using a complete electrode model with the help of impedance difference method considering finite element method (FEM) modeling. A noise controlled hyperparameter value ranges from 0.0097 to 0.57 in addition with the type, position, and size of the inhomogeneity is considered in the analysis.