Ultrasound elastography: a dynamic programming approach

H Rivaz, E Boctor, P Foroughi, R Zellars… - IEEE transactions on …, 2008 - ieeexplore.ieee.org
This paper introduces a 2-D strain imaging technique based on minimizing a cost function
using dynamic programming (DP). The cost function incorporates similarity of echo …

Real-time regularized ultrasound elastography

H Rivaz, EM Boctor, MA Choti… - IEEE transactions on …, 2010 - ieeexplore.ieee.org
This paper introduces two real-time elastography techniques based on analytic minimization
(AM) of regularized cost functions. The first method (1D AM) produces axial strain and …

Analysis of an adaptive strain estimation technique in elastography

S Srinivasan, F Kallel, R Souchon… - Ultrasonic …, 2002 - journals.sagepub.com
Elastography is based on the estimation of strain due to tissue compression or expansion.
Conventional elastography involves computing strain as the gradient of the displacement …

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 …

Estimation of displacement vectors and strain tensors in elastography using angular insonifications

U Techavipoo, Q Chen, T Varghese… - IEEE transactions on …, 2004 - ieeexplore.ieee.org
In current practice, only one out of three components of the tissue displacement vector and
one of nine components of the strain tensor are accurately estimated and imaged in …

Identifying the mechanical properties of tissue by ultrasound strain imaging

E Turgay, S Salcudean, R Rohling - Ultrasound in medicine & biology, 2006 - Elsevier
A new elastography method is presented that images the mechanical properties of soft
tissue. The tissue is externally vibrated over a range of frequencies simultaneously and the …

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 …

Ultrasound elastography based on multiscale estimations of regularized displacement fields

C Pellot-Barakat, F Frouin, MF Insana… - IEEE transactions on …, 2004 - ieeexplore.ieee.org
Elasticity imaging is based on the measurements of local tissue deformation. The approach
to ultrasound elasticity imaging presented in this paper relies on the estimation of dense …

Improvement of elastographic displacement estimation using a two-step cross-correlation method

H Chen, H Shi, T Varghese - Ultrasound in medicine & biology, 2007 - Elsevier
The cross-correlation algorithm used to compute the local strain components for
elastographic imaging requires a minimum radio-frequency data segment length of around …

Elastographic dynamic range expansion using variable applied strains

EE Konofagou, J Ophir, F Kallel… - Ultrasonic …, 1997 - journals.sagepub.com
In elastography, we want to image the entire range of stiffnesses of the elastic components
found in inhomogeneous tissues. In order to achieve this, the elastographic dynamic range …