Acoustical Physics

, Volume 62, Issue 5, pp 608–614

Velocity and attenuation of shear waves in the phantom of a muscle–soft tissue matrix with embedded stretched fibers

  • O. V. Rudenko
  • S. N. Tsyuryupa
  • A. P. Sarvazyan
Acoustics of Living Systems. Biomedical Acoustcs

DOI: 10.1134/S1063771016050146

Cite this article as:
Rudenko, O.V., Tsyuryupa, S.N. & Sarvazyan, A.P. Acoust. Phys. (2016) 62: 608. doi:10.1134/S1063771016050146
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Abstract

We develop a theory of the elasticity moduli and dissipative properties of a composite material: a phantom simulating muscle tissue anisotropy. The model used in the experiments was made of a waterlike polymer with embedded elastic filaments imitating muscle fiber. In contrast to the earlier developed phenomenological theory of the anisotropic properties of muscle tissue, here we obtain the relationship of the moduli with characteristic sizes and moduli making up the composite. We introduce the effective elasticity moduli and viscosity tensor components, which depend on stretching of the fibers. We measure the propagation velocity of shear waves and the shear viscosity of the model for regulated tension. Waves were excited by pulsed radiation pressure generated by modulated focused ultrasound. We show that with increased stretching of fibers imitating muscle contraction, an increase in both elasticity and viscosity takes place, and this effect depends on the wave propagation direction. The results of theoretical and experimental studies support our hypothesis on the protective function of stretched skeletal muscle, which protects bones and joints from trauma.

Keywords

radiation force ultrasound muscle phantom anisotropic muscle elasticity modulus viscosity tensor stretching of fibers 

Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  • O. V. Rudenko
    • 1
    • 2
    • 3
    • 4
  • S. N. Tsyuryupa
    • 5
  • A. P. Sarvazyan
    • 5
  1. 1.Physics FacultyMoscow State UniversityMoscowRussia
  2. 2.Nizhny Novgorod State UniversityNizhny NovgorodRussia
  3. 3.Prokhorov General Physics InstituteRussian Academy of SciencesMoscowRussia
  4. 4.Schmidt Institute of Physics of the EarthMoscowRussia
  5. 5.Artann Laboratories Inc.TrentonUSA

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