Scholars@Duke

Speckle decorrelation due to two-dimensional flow gradients.

Publication ,  Journal Article
Friemel, BH; Bohs, LN; Nightingale, KR; Trahey, GE
Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control
January 1998
Published version (DOI)

The performance of ultrasonic velocity estimation methods is degraded by speckle decorrelation, the change in received echoes over time. Because ultrasonic speckle is formed by the complex sum of echoes from subresolution scatterers, it is sensitive to the relative motion of those scatterers. Velocity gradients in flowing blood result in relative scatterer motion and can be a significant source of speckle decorrelation. Computer simulations were performed to evaluate speckle decorrelation due to two-dimensional flow gradients. Results indicate that decorrelation due to flow gradients is sensitive to the angle of flow and has a maximum at a beam-vessel angle of 0 degrees , i.e., purely axial flow. A quantitative summary of the major factors causing speckle decorrelation indicates that flow gradients are the most significant contributors under the conditions modeled.

Duke Scholars

Kathryn Radabaugh Nightingale
Author Kathryn Radabaugh Nightingale Biomedical Engineering
Gregg E. Trahey
Author Gregg E. Trahey Biomedical Engineering

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

10.1109/58.660142

EISSN

1525-8955

ISSN

0885-3010

Publication Date

January 1998

Volume

45

Issue

2

Start / End Page

317 / 327

Related Subject Headings

  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Friemel, B. H., Bohs, L. N., Nightingale, K. R., & Trahey, G. E. (1998). Speckle decorrelation due to two-dimensional flow gradients. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 45(2), 317–327. https://doi.org/10.1109/58.660142
Friemel, B. H., L. N. Bohs, K. R. Nightingale, and G. E. Trahey. “Speckle decorrelation due to two-dimensional flow gradients.” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 45, no. 2 (January 1998): 317–27. https://doi.org/10.1109/58.660142.
Friemel BH, Bohs LN, Nightingale KR, Trahey GE. Speckle decorrelation due to two-dimensional flow gradients. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 1998 Jan;45(2):317–27.
Friemel, B. H., et al. “Speckle decorrelation due to two-dimensional flow gradients.” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 45, no. 2, Jan. 1998, pp. 317–27. Epmc, doi:10.1109/58.660142.
Friemel BH, Bohs LN, Nightingale KR, Trahey GE. Speckle decorrelation due to two-dimensional flow gradients. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 1998 Jan;45(2):317–327.

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

10.1109/58.660142

EISSN

1525-8955

ISSN

0885-3010

Publication Date

January 1998

Volume

45

Issue

2

Start / End Page

317 / 327

Related Subject Headings

  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences