The figure below presents the electrical tomographies obtained with three different arrays on a model made up of two identical bodies, infinitely long, perpendicular to the array and moved away from four times their width. The patterns generated by these objects strongly differ according to the array employed. This is the reason for which, it is almost impossible to interpret correctly a non- inversed tomography. It is just possible to make some assumptions on the distribution of the apparent resistivities.

Apparent resistivies with 3 different configurations.