Speckle tracking for multi-dimensional flow estimation.
Speckle tracking methods overcome the major limitations of current Doppler methods for flow imaging and quantification: angle dependence and aliasing. In this paper, we review the development of speckle tracking, with particular attention to the advantages and limitations of two-dimensional algorithms that use a single transducer aperture. Ensemble tracking, a recent speckle tracking method based upon parallel receive processing, is described. Experimental results with ensemble tracking indicate the ability to measure laminar flow in a phantom at a beam-vessel angle of 60 degrees, which had not been possible with previous 2D speckle tracking methods. Finally, important areas for future research in speckle tracking are briefly summarized.
Bohs
L N
LN
Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA. larry.bohs@duke.edu
Geiman
B J
BJ
Anderson
M E
ME
Gebhart
S C
SC
Trahey
G E
GE
D000465:Algorithms; D001783:Blood Flow Velocity; D001808:Blood Vessels / Q000000981:diagnostic imaging*; D006801:Humans; D019047:Phantoms, Imaging; D014159:Transducers; D014463:Ultrasonography