A new approach of imaging an object profile from the scattered wavefield, which is measured using a large (far field approximation) circular array of sensors surrounding the object, is described. It is shown that 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 the well known effects of the finite window in numerical evaluation of the Fourier transform of the measured scattered field. This results into improved reconstruction.
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