Title :
A fundamental limit on the performance of phase aberration correction and correlation based flow estimates in medical ultrasound
Author :
Walker, W.F. ; Trahey, Gregg E.
Author_Institution :
Dept. of Biomed. Eng., Duke Univ., Durham, NC
fDate :
31 Oct-3 Nov 1993
Abstract :
Cross correlation and similar operations are used for displacement (delay) estimation in medical ultrasound. We apply the Cramer-Rao Lower Bound to derive analytical expressions to predict the magnitude of errors in displacement estimation using radio frequency and detected data in both one and two dimensions. These expressions are verified by simulation and applied to realistic situations in phase aberration correction and flow estimation
Keywords :
acoustic signal processing; biomedical ultrasonics; Cramer-Rao Lower Bound; cross correlation; delay estimation; displacement estimation; errors; flow; medical ultrasound; one dimension; performance limit; phase aberration; phase aberration correction/correlation based flow estimates; radio frequency; two dimensions; Biomedical imaging; Delay estimation; Jitter; Motion estimation; Phase estimation; Phase measurement; Radio frequency; Signal analysis; Strain measurement; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 1993. Proceedings., IEEE 1993
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1993.339586
