From the measurement of a low frequency (50–150 Hz) shear wave speed, transient elastography evaluates the Young’s modulus in isotropic soft tissues. In this paper, it is shown that a rod source can generate a low frequency polarized shear strain waves. Consequently this technique allows to study anisotropic medium such as muscle. The evidence of the polarization of low frequency shear strain waves is supported by both numeric simulations and experiments. The numeric simulations are based on theoretical Green’s functions in isotropic and anisotropic media (hexagonal system). The experiments in vitro led on beef muscle proves the pertinent of this simple anisotropic pattern. Results in vivo on man biceps shows the existence of slow and fast shear waves as predicted by theory.
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July 2003
July 03 2003
Transient elastography in anisotropic medium: Application to the measurement of slow and fast shear wave speeds in muscles
Jean-Luc Gennisson;
Jean-Luc Gennisson
Laboratoire Ondes et Acoustique, E.S.P.C.I., Université Paris VII, U.M.R. 7587 C.N.R.S. 1503, 10 rue Vauquelin, 75231 Paris cedex 05, France
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Stefan Catheline;
Stefan Catheline
Laboratoire Ondes et Acoustique, E.S.P.C.I., Université Paris VII, U.M.R. 7587 C.N.R.S. 1503, 10 rue Vauquelin, 75231 Paris cedex 05, France
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Sana Chaffaı̈;
Sana Chaffaı̈
Laboratoire Ondes et Acoustique, E.S.P.C.I., Université Paris VII, U.M.R. 7587 C.N.R.S. 1503, 10 rue Vauquelin, 75231 Paris cedex 05, France
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Mathias Fink
Mathias Fink
Laboratoire Ondes et Acoustique, E.S.P.C.I., Université Paris VII, U.M.R. 7587 C.N.R.S. 1503, 10 rue Vauquelin, 75231 Paris cedex 05, France
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J. Acoust. Soc. Am. 114, 536–541 (2003)
Article history
Received:
September 23 2002
Accepted:
April 14 2003
Citation
Jean-Luc Gennisson, Stefan Catheline, Sana Chaffaı̈, Mathias Fink; Transient elastography in anisotropic medium: Application to the measurement of slow and fast shear wave speeds in muscles. J. Acoust. Soc. Am. 1 July 2003; 114 (1): 536–541. https://doi.org/10.1121/1.1579008
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