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Ensemble tracking: a new method for 2D vector velocity measurement

Publication ,  Journal Article
Bohs, LN; Geiman, BJ; Nightingale, KR; Choi, CD; Friemel, BH; Trahey, GE
Published in: Proceedings of the IEEE Ultrasonics Symposium
December 1, 1995

We described a new method, called ensemble tracking, for quantifying two dimensional velocities. Compared to previous two-dimensional speckle tracking techniques, ensemble tracking measures motion over smaller translations, thereby reducing errors due to speckle decorrelation. The technique involves acquisition of an ensemble of 2D line sets along a single line of sight using parallel receive processing. This ensemble may be thought of as a sequence of 2D 'snapshots' of the same spatial region at different time instants. A kernel region in each snapshot is tracked within slightly larger search regions in subsequent snapshots, providing velocity estimates at multiple time lags. Interpolation is employed to provide velocity estimates for sub-pixel translations that occur in the short time intervals between parallel acquisitions. We present the results of initial computer simulations indicating the ability to track such sub-pixel translations, and discuss directions for further research in this area.

Duke Scholars

Published In

Proceedings of the IEEE Ultrasonics Symposium

ISSN

1051-0117

Publication Date

December 1, 1995

Volume

2

Start / End Page

1485 / 1488
 

Citation

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Bohs, L. N., Geiman, B. J., Nightingale, K. R., Choi, C. D., Friemel, B. H., & Trahey, G. E. (1995). Ensemble tracking: a new method for 2D vector velocity measurement. Proceedings of the IEEE Ultrasonics Symposium, 2, 1485–1488.
Bohs, L. N., B. J. Geiman, K. R. Nightingale, C. D. Choi, B. H. Friemel, and G. E. Trahey. “Ensemble tracking: a new method for 2D vector velocity measurement.” Proceedings of the IEEE Ultrasonics Symposium 2 (December 1, 1995): 1485–88.
Bohs LN, Geiman BJ, Nightingale KR, Choi CD, Friemel BH, Trahey GE. Ensemble tracking: a new method for 2D vector velocity measurement. Proceedings of the IEEE Ultrasonics Symposium. 1995 Dec 1;2:1485–8.
Bohs, L. N., et al. “Ensemble tracking: a new method for 2D vector velocity measurement.” Proceedings of the IEEE Ultrasonics Symposium, vol. 2, Dec. 1995, pp. 1485–88.
Bohs LN, Geiman BJ, Nightingale KR, Choi CD, Friemel BH, Trahey GE. Ensemble tracking: a new method for 2D vector velocity measurement. Proceedings of the IEEE Ultrasonics Symposium. 1995 Dec 1;2:1485–1488.

Published In

Proceedings of the IEEE Ultrasonics Symposium

ISSN

1051-0117

Publication Date

December 1, 1995

Volume

2

Start / End Page

1485 / 1488