A surface wave elastography technique for measuring tissue viscoelastic properties

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Abstract

A surface wave elastography method is proposed to study the viscoelastic properties of skin by measuring the surface wave speed and attenuation on the skin. Experiments were carried out on porcine skin tissues. The surface wave speed is measured by the change of phase with distance. The wave attenuation is measured by the decay of wave amplitude with distance. The change of viscoelastic properties with temperature was studied at room and body temperatures. The wave speed was 1.83. m/s at 22. °C but reduced to 1.52. m/s at 33. °C. The viscoelastic ratio was almost constant from 22. °C to 33. °C. Fresh and decayed tissues were studied. The wave speed of the decayed tissue increased from 1.83. m/s of fresh state to 2.73. m/s. The viscoelastic ratio was 0.412/mm at the decayed state compared to 0.215/mm at the fresh state. More tissue samples are needed to study these viscoelastic parameters according to specific applications.

Original languageEnglish (US)
JournalMedical Engineering and Physics
DOIs
StateAccepted/In press - Apr 30 2016

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Keywords

  • Surface wave elastography
  • Temperature effect
  • Tissue decay
  • Viscoelastic ratio
  • Wave attenuation
  • Wave speed

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering

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