A novel and robust method for rapid strain estimation in elastography

SK Alam - Ultrasonic imaging, 2004 - journals.sagepub.com
In elastography, change in signal shape from tissue deformation and nonaxial tissue motion
reduce correlation between the pre-and postcompression echo signals. Appropriate global …

Axial strain imaging using a local estimation of the scaling factor from RF ultrasound signals

E Brusseau, C Perrey, P Delachartre… - Ultrasonic …, 2000 - journals.sagepub.com
The main signal-processing techniques used in elastography compute strains as the
displacement derivative. They perform well for very low deformations, but suffer rapidly from …

On the use of envelope and RF signal decorrelation as tissue strain estimators

SK Alam, J Ophir - Ultrasound in medicine & biology, 1997 - Elsevier
Bamber and Bush (1995) used the correlation coefficient for freehand elasticity imaging.
Varghese and Ophir (1996) found it to be a biased estimator of strain with a large variability …

Comparison of windowing effects on elastography images: Simulation, phantom and in vivo studies

R Ahmed, R Arfin, MH Rubel, KK Islam, C Jia… - Ultrasonics, 2016 - Elsevier
In this paper, we have evaluated the use of smooth windows for ultrasound elastography. In
ultrasound elastography, local tissue strain is estimated using operations such as cross …

Adaptive spectral strain estimators for elastography

SK Alam, FL Lizzi, T Varghese, EJ Feleppa… - Ultrasonic …, 2004 - journals.sagepub.com
In conventional elastography, internal tissue deformations, induced by external compression
applied to the tissue surface, are estimated by cross-correlation analysis of echo signals …

Two-dimensional autocorrelation method for ultrasound-based strain estimation

V Shamdasani, Y Kim - … Conference of the IEEE Engineering in …, 2004 - ieeexplore.ieee.org
Ultrasound strain imaging maps the tissue stiffness in the region of interest by estimating
strain when the tissue is stressed. Prestress and poststress ultrasound echoes are …

Uniform precision ultrasound strain imaging

GM Treece, JE Lindop, AH Gee… - IEEE transactions on …, 2009 - ieeexplore.ieee.org
Ultrasound strain imaging is becoming increasingly popular as a way to measure stiffness
variation in soft tissue. Almost all techniques involve the estimation of a field of relative …

Theoretical derivation of SNR, CNR and spatial resolution for a local adaptive strain estimator for elastography

S Srinivasan, J Ophir, SK Alam - Ultrasound in medicine & biology, 2004 - Elsevier
Conventional techniques in elastography estimate the axial strain as the gradient of the
displacement (time-delay) estimates obtained using cross-correlation of pre-and temporally …

A 2D strain estimator with numerical optimization method for soft-tissue elastography

K Liu, P Zhang, J Shao, X Zhu, Y Zhang, J Bai - Ultrasonics, 2009 - Elsevier
Elastography is a bioelasticity-based imaging modality which has been proved to be a
potential evaluation tool to detect the tissue abnormalities. Conventional method for …

Power spectral strain estimators in elastography

EE Konofagou, T Varghese, J Ophir, SK Alam - Ultrasound in medicine & …, 1999 - Elsevier
Elastography can produce quality strain images in vitro and in vivo. Standard elastography
uses a coherent cross-correlation technique to estimate tissue displacement and tissue …