ABSTRACT
In medical computed tomography some kind of energy (such as x-rays, optical, electrical, sound, near infrared, etc.) is applied to the subject under test, and the modified or transformed form of the energy is collected or detected and compared with the incident one to reconstruct the spatial distribution of the tissue properties of the subject under test called the parameters of interest. Electrical impedance tomography (EIT) is an image reconstruction technique in which the electrical conductivity or resistivity of a conducting domain is reconstructed from the surface potentials developed by the current signals injected at the domain boundary. An EIT system is developed with mainly three parts: EIT sensors or surface electrodes, electronic instrumentation, and a PC with reconstruction algorithm. Sensors are the signal sensing devices or signal detectors that measure a physical quantity and send by converting it into a readable and observable signal to an observer or analyzable and measurable signal to an instrument.
