Typical electrical impedance tomography ("EIT") systems apply current to a
body under test and measure the induced voltages on the surface and then
through an inverse process, reconstruct an approximation to the
electrical conductivity in the interior. The EIT system described herein
employs a new approach to evaluating the interior electrical conductivity
by using a virtual short that allows both current and voltages to be
measured at various locations on the body under test. The architecture of
this system is described, distinguishability of embedded conductive
anomalies is evaluated, typical error sources associated with a virtual
short measurement is discussed in the context of electrical impedance
tomography, and a new imaging system is discussed.