S-sequence encoded synthetic aperture B-scan ultrasound imaging

Traditional synthetic aperture ultrasound scanning involves firing on one element and receiving on all elements of an array, then firing another transmit element and receiving on all elements until all transmit-receive element pairs have been sampled. It offers excellent resolution but at the expense of signal-to-noise. To remedy this difficulty we propose an aperture encoding scheme that involves firing on multiple elements sampled from a Hadamard S-matrix, then applying matrix inversion methods to decouple signals to recover the effective synthetic aperture imaging set for subsequent image reconstruction. Because more than one elements are fired at a time, signal-to-noise is improved.