The system is oriented mainly to obtain images of the human torax cavity since the gradient of resistance is bigger there because of the air inside the lungs.  It is also known that detailed images of the lungs are needed to help in the diagnosis of covid19, probably this system is more suitable for detect higher variations in electric resistivity as can be a lung partially  filled with liquid. 

The measurement of resistance in living beings is complex due to the presence of natural electric potentials. This is overcome using a tool capable of measure resistance neutralizing mathematically the natural electric potentials in each measurement.