1-D elasticity assessment in soft solids from shear wave correlation: the time-reversal approach

2009 ◽  
Vol 56 (11) ◽  
pp. 2400-2410 ◽  
Author(s):  
N. Benech ◽  
S. Catheline ◽  
J. Brum ◽  
T. Gallot ◽  
C. Negreira
Keyword(s):  
Shear Wave ◽  
Time Reversal ◽  
Soft Solids

Time reversal elastography: A correlation tomography of complex shear wave field in soft solids.

2010 ◽  
Vol 127 (3) ◽  
pp. 1730-1730 ◽  
Author(s):  
Thomas Gallot ◽  
Stefan Catheline ◽  
Philippe Roux ◽  
Javier Brum ◽  
Carlos Negreira
Keyword(s):  
Wave Field ◽  
Shear Wave ◽  
Time Reversal ◽  
Soft Solids ◽  
Complex Shear

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 Shear-wave generation from cavitation in soft solids

2019 ◽  
Vol 114 (12) ◽  
pp. 123702 ◽  
Author(s):  
J. Rapet ◽  
Y. Tagawa ◽  
C. D. Ohl
Keyword(s):  
Shear Wave ◽  
Wave Generation ◽  
Soft Solids

3D shear wave generation in soft tissues using the time reversal kaleidoscopes

2004 ◽  
Vol 115 (5) ◽  
pp. 2595-2595 ◽  
Author(s):  
Delphine Palacio ◽  
Jeremy Bercoff ◽  
Gabriel Montaldo ◽  
Mickael Tanter ◽  
Mathias Fink ◽  
...  
Keyword(s):  
Shear Wave ◽  
Time Reversal ◽  
Soft Tissues ◽  
Wave Generation

Time reversal elastography in soft solids

2008 ◽  
Vol 123 (5) ◽  
pp. 3338-3338
Author(s):  
Thomas Gallot ◽  
Stefan Catheline ◽  
Nicolas Benech ◽  
Javier Brum ◽  
Carlos Negreira ◽  
...  
Keyword(s):  
Time Reversal ◽  
Soft Solids
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