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Soft Tissue Simulation in Ultrasonic Diagnosis Using Cross-Linked Hydrophobic Gels

  • P. Schuwert

Abstract

It is known that ultrasonic wave propagation and attenuation in biological matter depends on density, macroscopic structure, and viscoelastic properties such as the complex plane wave moduli M+ = K+ + 4/3 G+, where K+ and G+ are the complex bulk and shear moduli respectively(l). In an attempt to identify suitable tissue equivalent (TE) materials, an initial study of ultrasonic wave propagation speed, and attenuation frequency power dependence, was made on two hydrophobic gel systems. The influence of variation in chemical structure, i.e. polymerization and cross-linkage degree, was recorded in the frequency range 2–10 MHz including the effect of introducing different scattering obstacles. Two different measuring methods were used, wave amplitude transmission and a modified resonance technique originally described by Eggers(2).

Keywords

Gelatine Matrix Ultrasonic Wave Propagation Attenuation Frequency Dependence Attenuation Frequency Ultrasonic Diagnosis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    A. Matheson, “Molecular Acoustics”, chapter 2, Wiley Inter-science (1970).Google Scholar
  2. 2.
    F. Eggers, Eine Resonatormethode zur Bestimmung von Schallgeschwindigkeit und Dämpfung an geringen Flüssigkeitsmengen, Acustica 19:323–329 (1967/68).Google Scholar
  3. 3.
    Private communication, Dr Rassing, Royal Danish Institute of Pharmacy, Copenhagen.Google Scholar
  4. 4.
    E. Madsen and I. Zaqzebski, Med. Phys. (Oct. 1980).Google Scholar
  5. 5.
    Dunn O’Brien, “Ultrasonic Bioacoustics” (1977)Google Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • P. Schuwert
    • 1
  1. 1.Department of Radiation PhysicsKarolinska InstituteStockholmSweden

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