Global time-delay estimation in ultrasound elastography

HS Hashemi, H Rivaz - IEEE transactions on ultrasonics …, 2017 - ieeexplore.ieee.org
A critical step in quasi-static ultrasound elastography is the estimation of time delay between
two frames of radio-frequency (RF) data that are obtained while the tissue is undergoing …

Global ultrasound elastography in spatial and temporal domains

M Ashikuzzaman, CJ Gauthier… - IEEE transactions on …, 2019 - ieeexplore.ieee.org
In this paper, a novel computationally efficient quasi-static ultrasound elastography
technique is introduced by optimizing an energy function. Unlike conventional elastography …

Combining first-and second-order continuity constraints in ultrasound elastography

M Ashikuzzaman, A Sadeghi-Naini… - IEEE Transactions …, 2021 - ieeexplore.ieee.org
Ultrasound elastography is a prominent noninvasive medical imaging technique that
estimates tissue elastic properties to detect abnormalities in an organ. A common …

Second-Order Ultrasound Elastography With L1-Norm Spatial Regularization

M Ashikuzzaman, H Rivaz - IEEE Transactions on Ultrasonics …, 2022 - ieeexplore.ieee.org
Time delay estimation (TDE) between two radio-frequency (RF) frames is one of the major
steps of quasi-static ultrasound elastography, which detects tissue pathology by estimating …

3D normalized cross-correlation for estimation of the displacement field in ultrasound elastography

M Mirzaei, A Asif, M Fortin, H Rivaz - Ultrasonics, 2020 - Elsevier
This paper introduces a novel technique to estimate tissue displacement in quasi-static
elastography. A major challenge in elastography is estimation of displacement (also referred …

Combining total variation regularization with window-based time delay estimation in ultrasound elastography

M Mirzaei, A Asif, H Rivaz - IEEE transactions on medical …, 2019 - ieeexplore.ieee.org
A major challenge of free-hand palpation ultrasound elastography (USE) is estimating the
displacement of RF samples between pre-and post-compressed RF data. The problem of …

Trade-offs between the axial resolution and the signal-to-noise ratio in elastography

S Srinivasan, R Righetti, J Ophir - Ultrasound in medicine & biology, 2003 - Elsevier
Elastography involves tracking the ultrasonic A-mode signals before and after mechanical
compression of tissue to form a computed image of the local strains undergone by various …

Multiresolution imaging in elastography

T Varghese, M Bilgen, J Ophir - IEEE transactions on …, 1998 - ieeexplore.ieee.org
The range of strains that can be imaged by any practical elastographic imaging system is
inherently limited, and a performance measure is valuable to evaluate these systems from …

Elastographic imaging using staggered strain estimates

S Srinivasan, J Ophir, SK Alam - Ultrasonic imaging, 2002 - journals.sagepub.com
Conventional techniques in elastography estimate strain as the gradient of the displacement
estimates obtained through crosscorrelation of pre-and postcompression rf A-lines. In these …

Theoretical bounds on strain estimation in elastography

I Cespedes, M Insana, J Ophir - IEEE transactions on …, 1995 - ieeexplore.ieee.org
Elastography is a technique for the estimation of tissue elasticity that is based on the
estimation of strain. Tissue strain can be estimated by finite difference computations of echo …