Relaxation mechanisms features of ultrasonic absorption in soft tissues

Authors

  • I. V. Skresanova The Kharkiv National University Author
  • E. A. Barannik The Kharkiv National University Author

Keywords:

molecular relaxation, ultrasound absorption, biological tissues, dispersion relation

Abstract

In the present paper it has been shown that universal linear dependence of absorption coefficient of ultrasound practically in all soft tissues can be explained only in case of consideration the multiplicity of relaxation mechanisms. Besides totality of these mechanisms is characterized by wide range of relaxation time on the molecular and cellular level. At that the weighting function with inverse proportion time dependence leads to experimentally observed in soft tissues frequency dependence of attenuation coefficient which is closed to linear. In case of wide range of frequency the similar dependence can be typical even for biological objects with relatively small number of degrees of freedom. In the general case of assumed contribution of different relaxation mechanisms various functional frequency dependences for velocity of sound and attenuation coefficient which can be observed.

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Author Biographies

  • I. V. Skresanova, The Kharkiv National University

    4, sq. Svobody, 61077, Kharkiv, Ukraine

  • E. A. Barannik, The Kharkiv National University

    4, sq. Svobody, 61077, Kharkiv, Ukraine

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Published

2007-06-05

Issue

Vol. 1 No. 18 (2007): Біофізичний вісник

Section

Medical physics

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How to Cite

Relaxation mechanisms features of ultrasonic absorption in soft tissues. (2007). Biophysical Bulletin, 1(18), 73-77. https://periodicals.karazin.ua/biophysvisnyk/article/view/12625

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