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Fundamental limit on the accuracy of speckle signal alignment

Publication ,  Journal Article
Walker, WF; Trahey, GE
Published in: Proceedings of the IEEE Ultrasonics Symposium
December 1, 1994

Signal alignment is performed in phase aberration correction and measurement, tissue elasticity estimation, and tissue and blood velocity estimation. The performance of all these techniques is limited by errors in the alignment of signals received from speckle generating targets. We have derived an analytical expression based on the Cramer-Rao Lower Bound which predicts the magnitude of jitter errors resulting from the alignment of radio frequency speckle data. The expression includes the effects of finite length samples of data, signal decorrelation, electronic noise, signal bandwidth, and center frequency. This expression indicates that signal decorrelation is a significant source of jitter for many ultrasound applications.

Duke Scholars

Published In

Proceedings of the IEEE Ultrasonics Symposium

ISSN

1051-0117

Publication Date

December 1, 1994

Volume

3

Start / End Page

1787 / 1791
 

Citation

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Walker, W. F., & Trahey, G. E. (1994). Fundamental limit on the accuracy of speckle signal alignment. Proceedings of the IEEE Ultrasonics Symposium, 3, 1787–1791.
Walker, W. F., and G. E. Trahey. “Fundamental limit on the accuracy of speckle signal alignment.” Proceedings of the IEEE Ultrasonics Symposium 3 (December 1, 1994): 1787–91.
Walker WF, Trahey GE. Fundamental limit on the accuracy of speckle signal alignment. Proceedings of the IEEE Ultrasonics Symposium. 1994 Dec 1;3:1787–91.
Walker, W. F., and G. E. Trahey. “Fundamental limit on the accuracy of speckle signal alignment.” Proceedings of the IEEE Ultrasonics Symposium, vol. 3, Dec. 1994, pp. 1787–91.
Walker WF, Trahey GE. Fundamental limit on the accuracy of speckle signal alignment. Proceedings of the IEEE Ultrasonics Symposium. 1994 Dec 1;3:1787–1791.

Published In

Proceedings of the IEEE Ultrasonics Symposium

ISSN

1051-0117

Publication Date

December 1, 1994

Volume

3

Start / End Page

1787 / 1791