Modelling of three-dimensional resistive discontinuities using HSPICE

This paper describes how the circuit analysis package HSPICE can be used to model an electrical resistance tomography system in two and three dimensions. Reasons for developing an HSPICE model using discrete components are introduced followed by a discussion of the theory underlying this technique. Image reconstructions using a simplified back projection algorithm are presented which simulate the movement of resistive discontinuities through an electrode plane in an attempt to investigate process flows.