Quality factors for phase-aberration correction in medical ultrasound

Gregg E. Trahey; Danhua Zhao

doi:10.1117/12.18782

1 July 1990 Quality factors for phase-aberration correction in medical ultrasound

Gregg E. Trahey, Danhua Zhao

Proceedings Volume 1231, Medical Imaging IV: Image Formation; (1990) https://doi.org/10.1117/12.18782
Event: Medical Imaging '90, 1990, Newport Beach, CA, United States

Abstract

Spatial inhomogeneities in the acoustic velocity of tissues degrade the contrast and resolution of diagnostic ultrasonic images. A system which iteratively adjusts the phases of signals transmitted and received from individual elements in a phased array scanner in order to restore image quality when imaging through inhomogeneous layers is described. The adjustments are selected to maximize a quality factor in an operator-selectable region-of-interest. The use of several quality factors in improving image quality, including the average local and the peak echo magnitude of diffuse and point-like targets and integral powers of these magnitudes were investigated. Theory and experimental results related to these investigations is presented.

Citation Download Citation

Gregg E. Trahey and Danhua Zhao "Quality factors for phase-aberration correction in medical ultrasound", Proc. SPIE 1231, Medical Imaging IV: Image Formation, (1 July 1990); https://doi.org/10.1117/12.18782

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