Author(s)

H.N. Oguz & David Haif

Abstract

An algorithm for imaging high contrast objects is developed by means of a 3-D boundary integral method. In the model problem, a conductive cylin- der with embedded voids is considered. Simulated measurement points are placed on a band around the mid section of the cylinder, and a given distri- bution of an electric potential is applied. Starting with initial void shapes and locations, a forward problem is solved with a boundary integral method. The difference between the computed and measured fluxes at the electrodes are minimized by a Levenberg-Marquardt algorithm. The shapes of the voids are parameterized to reduce the degrees of freedom of the system, and to stabilize the inversion process. Numerical simulations show that spheroidal voids can be accurately imaged with a singl

Keywords