3-DIMENSIONAL INVERSE-SCATTERING NUMERICAL-SOLUTION WITHIN THE RAYLEIGH APPROXIMATION - PRELIMINARY-RESULTS

An approach to three-dimensional microwave imaging is proposed. Usuall y, because of the wide computational resource that is required by this kind of imaging that is based on the full-vector integral equations f or the inverse scattering problem, linearizing approximations are empl oyed. In this Letter, we exploit the use of the Rayleigh approximation in conjunction with a previously proposed numerical solution. We will show that the approach requires the same computational load as the on e that makes use of the first-order Born approximation, but it provide s an improvement in the reconstruction accuracy for a certain range of contrast values. (C) 1997 John Wiley & Sons, Inc.