Elasticity imaging of inhomogeneous media using inverse filtering with multiple shear wave generation

2016 ◽  
Vol 140 (4) ◽  
pp. 3138-3138 ◽  
Author(s):  
Tsuyoshi Shiina
Keyword(s):  
Shear Wave ◽  
Inhomogeneous Media ◽  
Wave Generation ◽  
Elasticity Imaging ◽  
Inverse Filtering

scholarly journals Scholte wave generation during single tracking location shear wave elasticity imaging of engineered tissues

2015 ◽  
Vol 138 (2) ◽  
pp. EL138-EL144 ◽  
Author(s):  
Karla P. Mercado ◽  
Jonathan Langdon ◽  
María Helguera ◽  
Stephen A. McAleavey ◽  
Denise C. Hocking ◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Generation ◽  
Elasticity Imaging ◽  
Engineered Tissues ◽  
Scholte Wave ◽  
Shear Wave Elasticity Imaging

Shear wavelength estimation based on inverse filtering and multiple-point shear wave generation

2016 ◽  
Vol 55 (7S1) ◽  
pp. 07KF10 ◽  
Author(s):  
Tomoaki Kitazaki ◽  
Kengo Kondo ◽  
Makoto Yamakawa ◽  
Tsuyoshi Shiina
Keyword(s):  
Shear Wave ◽  
Wave Generation ◽  
Multiple Point ◽  
Inverse Filtering

Analysis of Shear Wave Generation by Decoupled and Partially Coupled Explosions

2009 ◽  
Author(s):  
Jeffry L. Stevens ◽  
G. E. Baker ◽  
Heming Xu
Keyword(s):  
Shear Wave ◽  
Wave Generation

Viscoelastic Characterization in Muscle using Group Speed Analysis and Volumetric Shear Wave Elasticity Imaging

2020 ◽  
Author(s):  
Courtney A. Trutna ◽  
Anna E. Knight ◽  
Ned C. Rouze ◽  
Lisa D. Hobson-Webb ◽  
Mark L. Palmeri ◽  
...  
Keyword(s):  
Shear Wave ◽  
Elasticity Imaging ◽  
Group Speed ◽  
Shear Wave Elasticity Imaging

scholarly journals Shear Wave Elastography Based on Noise Correlation and Time Reversal

2021 ◽  
Vol 9 ◽  
Author(s):  
Javier Brum ◽  
Nicolás Benech ◽  
Thomas Gallot ◽  
Carlos Negreira
Keyword(s):  
Shear Wave ◽  
Time Reversal ◽  
Shear Waves ◽  
Shear Wave Elastography ◽  
Noise Correlation ◽  
Elasticity Imaging ◽  
Physiological Noise ◽  
Wave Source ◽  
Imaging Device ◽  
Shear Elasticity

Shear wave elastography (SWE) relies on the generation and tracking of coherent shear waves to image the tissue's shear elasticity. Recent technological developments have allowed SWE to be implemented in commercial ultrasound and magnetic resonance imaging systems, quickly becoming a new imaging modality in medicine and biology. However, coherent shear wave tracking sets a limitation to SWE because it either requires ultrafast frame rates (of up to 20 kHz), or alternatively, a phase-lock synchronization between shear wave-source and imaging device. Moreover, there are many applications where coherent shear wave tracking is not possible because scattered waves from tissue’s inhomogeneities, waves coming from muscular activity, heart beating or external vibrations interfere with the coherent shear wave. To overcome these limitations, several authors developed an alternative approach to extract the shear elasticity of tissues from a complex elastic wavefield. To control the wavefield, this approach relies on the analogy between time reversal and seismic noise cross-correlation. By cross-correlating the elastic field at different positions, which can be interpreted as a time reversal experiment performed in the computer, shear waves are virtually focused on any point of the imaging plane. Then, different independent methods can be used to image the shear elasticity, for example, tracking the coherent shear wave as it focuses, measuring the focus size or simply evaluating the amplitude at the focusing point. The main advantage of this approach is its compatibility with low imaging rates modalities, which has led to innovative developments and new challenges in the field of multi-modality elastography. The goal of this short review is to cover the major developments in wave-physics involving shear elasticity imaging using a complex elastic wavefield and its latest applications including slow imaging rate modalities and passive shear elasticity imaging based on physiological noise correlation.

scholarly journals Intra- and inter-observer agreement of cervical shear wave elasticity imaging for induction of labor

2022 ◽  
Vol 226 (1) ◽  
pp. S421-S422
Author(s):  
Lindsey Carlson ◽  
Helen Feltovich ◽  
Ivan Rosado-Mendez ◽  
William A. Grobman ◽  
Marianne Helvey ◽  
...  
Keyword(s):  
Shear Wave ◽  
Induction Of Labor ◽  
Observer Agreement ◽  
Elasticity Imaging ◽  
Shear Wave Elasticity Imaging

Towed Marine Dipole Source for Shear Wave Generation

2016 ◽  
Author(s):  
Y. Nagai ◽  
A. Tsuda ◽  
H. Ozasa ◽  
H. Hatanaka ◽  
K. Tanaka ◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Generation ◽  
Dipole Source
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