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Analysis of conductivity effects in 2D electrical tomography systems: a simulation study

In this paper, electrical impedance tomography (EIT), a method of imaging the interior permittivity distribution of an inhomogenity by measuring current and voltage at the surface is applied for determining the shape and position of unwanted growth within a specified area. The model, we have developed, using 8 and 16 electrode Electrical Tomography system is used to identify the presence of such objects within a particular area and can also figure out the shape of the same. Here, a regular shaped object (considered to be air) is surrounded by water is designed in 2D platform of FEM based Multiphysics software. Then a potential difference on the boundaries of the simulated model is collected with the array of gold electrodes. The data thus obtained are plotted to obtain the voltage density plots. The conductivity values of the water surrounding medium are varied and the capacitive effects across the electrode pairs are also considered. The constructed models in the software are solved with the forward solver of Electrical Impedance Tomography.