Electrical Impedance Tomogrphy

Abstract: Electrical impedance tomography (EIT) is the technique that applies time varying currents to the surface of a human body and stores the resulting voltages in order to reconstruct and display the electrical conductivity and permittivity in the interior of the body. This technique exhibits the electrical properties of tissues such as resistance and capacitance. It exploits the differences in the electrical properties of tissues in order to generate a tomographic image. When electric current is fed through different available electrode pairs and by measuring the corresponding voltages at remaining pair of electrodes, it is possible to create an image of the impedance of different regions by using certain reconstruction algorithms. This method is called impedance imaging.

Keywords: Electrical Impedance Tomography (EIT); Data Acquisition; current Injection; Electrodes.