Measurement of the acoustic nonlinearity parameter B/A in human tissues by a thermodynamic method

Chandra M. Sehgal, Robert C. Bahn, James F. Greenleaf

Research output: Contribution to journalArticle

68 Scopus citations

Abstract

A thermodynamic method for measuring the acoustic nonlinearity parameter B /A in tissues is presented. It is based on the measurement of change in phase velocity as a function of time as the hydrostatic pressure of the sample is quickly reduced from a known value. This technique circumvents the effect of the attenuation in the medium and does not require a prior knowledge of the thermodynamic parameters of the tissues. The method is used to estimate nonlinearity parameters for normal and malignant tissues in the temperature range 20° to 37 °C. The values and the temperature dependence of these parameters are found to vary with the nature of the tissues.

Original languageEnglish (US)
Pages (from-to)1023-1029
Number of pages7
JournalJournal of the Acoustical Society of America
Volume76
Issue number4
DOIs
StatePublished - Oct 1984

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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