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

Content Provider	IEEE Xplore Digital Library
Author	Bohs, L.N. Geiman, B.J. Nightingale, K.R. Choi, C.D. Friemel, B.H. Trahey, G.E.
Copyright Year	1995
Description	Author affiliation: Dept. of Biomed. Eng., Duke Univ., Durham, NC, USA (Bohs, L.N.)
Abstract	The authors describe 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. The authors 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.
Starting Page	1485
Ending Page	1488
File Size	305598
Page Count	4
File Format	PDF
ISBN	0780329406
ISSN	10510117
DOI	10.1109/ULTSYM.1995.495836
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-11-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Velocity measurement Speckle Kernel Decorrelation Biomedical measurements Frequency Biomedical engineering Ultrasonic imaging Ultrasonic variables measurement Computational modeling
Content Type	Text
Resource Type	Article

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