Tracking shear waves in turbid medium by light: theory, simulation, and experiment

Shear wave propagation provides rich information for material mechanical characterization, including elasticity and viscosity. This Letter reports tracking of shear wave propagation in turbid media by laser-speckle-contrast analysis. The theory is described, and a Monte Carlo simulation of light she...

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Bibliographic Details
Published in:Optics letters 2014-03, Vol.39 (6), p.1597-1600
Main Authors: Li, Sinan, Cheng, Yi, Song, Lipei, Eckersley, Robert J, Elson, Daniel S, Tang, Meng-Xing
Format: Article
Language:English
Subjects:
Amplitudes
Computer Simulation
Elasticity
Lasers
Mechanical properties
Models, Statistical
Monte Carlo methods
Nephelometry and Turbidimetry - methods
Scattering, Radiation
Shear Strength
Sound waves
Tracking
Viscosity
Wave propagation
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Summary:Shear wave propagation provides rich information for material mechanical characterization, including elasticity and viscosity. This Letter reports tracking of shear wave propagation in turbid media by laser-speckle-contrast analysis. The theory is described, and a Monte Carlo simulation of light shear wave interaction was developed. Simulation and experiments on tissue-mimicking phantoms agree well and show tracking of shear wave at the phantom surface and at depth as well as multiple shear waves interacting within the object. The relationship between speckle contrast value and shear wave amplitude is also investigated.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.39.001597