• Publications
  • Influence
A fundamental limit on delay estimation using partially correlated speckle signals
  • W. Walker, G. Trahey
  • Physics
  • IEEE Transactions on Ultrasonics, Ferroelectrics…
  • 1 March 1995
Delay estimation is used in ultrasonic imaging to estimate blood or soft tissue motion, to measure echo arrival time differences for phase aberration correction, and to estimate displacement forExpand
  • 461
  • 44
Rapid tracking of small displacements with ultrasound
TLDR
Time-delay estimators, such as normalized cross correlation and phase-shift estimation, form the computational basis for elastography, blood flow measurements, and acoustic radiation force impulse (ARFI) imaging. Expand
  • 301
  • 25
A novel method for angle independent ultrasonic imaging of blood flow and tissue motion
  • L. N. Bohs, G. Trahey
  • Computer Science, Medicine
  • IEEE Transactions on Biomedical Engineering
  • 1 March 1991
TLDR
A simple algorithm for angle independent motion imaging is described. Expand
  • 475
  • 18
Estimates of echo correlation and measurement bias in acoustic radiation force impulse imaging
Acoustic radiation force impulse (ARFI) imaging is a novel imaging modality in which pulses from a diagnostic ultrasound scanner are used to displace tissue and track its motion. The region displacedExpand
  • 72
  • 12
A parallel tracking method for acoustic radiation force impulse imaging
Radiation force-based techniques have been developed by several groups for imaging the mechanical properties of tissue. Acoustic radiation force impulse (ARFI) imaging is one such method that usesExpand
  • 141
  • 8
Speckle Pattern Correlation with Lateral Aperture Translation: Experimental Results and Implications for Spatial Compounding
In order to design improved spatial compounding ultra- sound scanning systems it is necessary to determine the correlation of speckle patterns as a function of aperture translation. We have con-Expand
  • 266
  • 7
Dynamic mechanical response of elastic spherical inclusions to impulsive acoustic radiation force excitation
Acoustic radiation force impulse imaging has been used clinically to study the dynamic response of lesions relative to their background material to focused, impulsive acoustic radiation forceExpand
  • 104
  • 6
Synthetic receive aperture imaging with phase correction for motion and for tissue inhomogeneities. II. Effects of and correction for motion
  • G. Trahey, L.F. Nock
  • Physics, Medicine
  • IEEE Transactions on Ultrasonics, Ferroelectrics…
  • 1992
For Pt.I see ibid., vol.39, p.489 (1992). The effects of tissue/transducer motion and artifacts from adaptive focusing on synthetic receive aperture (SRA) imaging are explored using experiment,Expand
  • 133
  • 6
The application of k-space in pulse echo ultrasound
  • W. Walker, G. Trahey
  • Computer Science, Medicine
  • IEEE Transactions on Ultrasonics, Ferroelectrics…
  • 1998
TLDR
This paper presents analytical and conceptual techniques for estimating the k-space representation of pulse echo imaging systems with arbitrary transmit and receive array geometries and apodizations. Expand
  • 77
  • 6
A fundamental limit on the performance of correlation based phase correction and flow estimation techniques
  • W. Walker, G. Trahey
  • Physics
  • IEEE Transactions on Ultrasonics, Ferroelectrics…
  • 1 September 1994
Cross correlation and similar operations are used in ultrasonic imaging to estimate blood or soft tissue motion in one or more dimensions and to measure echo arrival time differences for phaseExpand
  • 110
  • 5