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An Experimental Study of Synthetic Aperture Ultrasonic Imaging by Fourier Domain Reconstruction Method (FDR)

This paper describes experimental study of the Fourier domain reconstruction method (FDR), which was proposed by the author previously to improve lateral resolution of the ultrasonic B-scope. Imaging properties of the method for planar objects, that is, extended objects generally, are remarkably superior to those of the conventional synthetic aperture focusing methods, commonly known as the delay and sum methods (D&S). Faithful images of several objects have been reconstructed experimentally by FDR. A brief review of a new algorithm for the pruning FFT which is adopted to FDR is also presented.