DIFFRACTION TOMOGRAPHIC IMAGING WITH A CIRCULAR ARRAY

A new approach of imaging an object profile from the scattered wavefie ld, which is measured using a large (far field approximation) circular array of sensors surrounding the object, is described, It is shown th at the measured field is itself proportional to the Fourier transform of the object, Consequently, as compared to the existing methods, such as back propagation method for a linear array, our method overcomes t he well known effects of the finite window in numerical evaluation of the Fourier transform of the measured scattered field. This results in to improved reconstruction.