The cross algorithm for phase-aberration correction in medical ultrasound images formed with two-dimensional arrays

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Yue Li, Brent S Robinson

Abstract

Common-midpoint signals in the near-field signal-redundancy (NFSR) algorithm for one-dimensional arrays are acquired using three consecutive transducer elements. An all-row-plus-two-column algorithm has been proposed to implement the one-dimensional NFSR algorithm on two dimensional arrays. The disadvantage of this method is that its ambiguity profile is not linear and a timeconsuming iterative method has to be used to linearize the ambiguity profile. An all-row-plus-two-column-and-a-diagonal algorithm has also been proposed. Its ambiguity profile is linear, but it is very sensitive to noise and cannot be used. In this paper, a novel cross algorithm is proposed to implement the NFSR algorithm on two-dimensional arrays. In this algorithm, common-midpoint signals are acquired using four adjacent transducer elements, which is not available in one-dimensional arrays. Its advantage includes a linear ambiguity profile and a higher measurement signal-to-noise ratio. The performance of the cross algorithm is evaluated theoretically. The region of redundancy is analyzed. The procedure for deriving the phaseaberration profile from peak positions of cross-correlation functions between common-midpoint signals is discussed. This algorithm i...Continue Reading

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Citations

Aug 17, 2012·The Journal of the Acoustical Society of America·Yue Li, Brent Robinson
Nov 13, 2012·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Wei JiangRobert C Waag
Dec 4, 2008·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Yue Li

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