Estimation of strain elastography from ultrasound radio-frequency data by utilizing analytic gradient of the similarity metric

M Omidyeganeh, Y Xiao, MO Ahmad… - IEEE transactions on …, 2017 - ieeexplore.ieee.org
Most strain imaging techniques follow a pipeline strategy: in the first step, tissue
displacement is estimated from radio-frequency (RF) frames, and in the second step, a …

Performance evaluation of methods for two-dimensional displacement and strain estimation using ultrasound radio frequency data

RGP Lopata, MM Nillesen, HHG Hansen… - Ultrasound in medicine …, 2009 - Elsevier
In elastography, several methods for 2-D strain imaging have been introduced, based on
both raw frequency (RF) data and speckle-tracking. Although the precision and lesion …

Robust strain-estimation algorithm using combined radiofrequency and envelope cross-correlation with diffusion filtering

MA Hussain, SK Alam, SY Lee… - Ultrasonic …, 2012 - journals.sagepub.com
In ultrasound elastography, the strain in compressed tissue due to external deformation is
estimated and is smaller in harder than softer tissue. With increased stress, the nonaxial …

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 …

Ultrasound 2D strain estimator based on image registration for ultrasound elastography

X Yang, M Torres, S Kirkpatrick… - Medical Imaging …, 2014 - spiedigitallibrary.org
In this paper, we present a new approach to calculate 2D strain through the registration of
the pre-and post-compression (deformation) B-mode image sequences based on an …

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 …

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 …

Direct mean strain estimation for elastography using nearest-neighbor weighted least-squares approach in the frequency domain

MK Hasan, EMA Anas, SK Alam, SY Lee - Ultrasound in medicine & biology, 2012 - Elsevier
Ultrasound elastography is emerging with enormous potential as a medical imaging
modality for effective discrimination of pathological changes in soft tissue. It maps the tissue …

Angular strain estimation method for elastography

U Bae, Y Kim - IEEE transactions on ultrasonics, ferroelectrics …, 2007 - ieeexplore.ieee.org
In the conventional cross-correlation-based strain estimation, there is a trade-off between
the interpolation accuracy and the computational requirement. On the other hand, the …

Direct phase-based strain estimator for ultrasound tissue elasticity imaging

U Bae, Y Kim - The 26th Annual International Conference of …, 2004 - ieeexplore.ieee.org
Palpation has been widely used to detect hard tumorous tissues surrounded by softer
normal tissues. The goal of ultrasound tissue elasticity imaging is to extract information …