A Low Cost Electrical Impedance Tomography (EIT) for Pulmonary Disease Modelling and Diagnosis

This paper reports the design, development and implementation of a low cost electrical impedance tomography system. A 16 electrode EIT system was designed around a phantom tank. A 60 kHz constant sinusoidal current of up to 1 mA is induced in the first and second electrode and the root-mean-square potential on all the adjacent pairs of electrodes placed clockwise is measured directly by the analogue pins of an Arduino Mega microcontroller. This data is fed and then executed in MATLAB which is interfaced with EIDORS software to reconstruct the image based on the acquired data. This is the most economical EIT system designed and tested so far as compared to other EIT systems.