Comparison of procedures for determination of acoustic nonlinearity of some inhomogeneous materials

Leif Bjørnø Jensen

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    Abstract

    The widespread use of ultrasonic energy in medical diagnosis and therapy and the recent research showing the existence of nonlinear acoustic effects in inhomogeneous materials, like biological media, have led to a strongly increased interest in investigations aiming at providing enough information for an evaluation of the second order nonlinearity ratio B/A as a tissue characterizing parameter on a par with attenuation, impedance, etc. The several techniques used for the determination of B/A roughly fall into two main groups, finite-amplitude methods and thermo-dynamic-acoustic methods. The B/A values determined using various techniques of the two main groups are strongly scattered, showing a dependence on the procedure used, which makes it difficult to draw any valid conclusions. The paper discusses advantages and disadvantages of the techniques used hitherto, aiming at an explanation of the reasons for the deviations between the present B/A results for biological media. The necessary accuracy in the determination and the reliability in the exploitation of B/A as a tissue characterizing parameter for clinical use are emphasized.
    Original languageEnglish
    JournalAcoustical Society of America. Journal
    Volume74
    Issue numberS1
    Pages (from-to)S27-S27
    ISSN0001-4966
    DOIs
    Publication statusPublished - 1983
    Event106th Meeting of the Acoustical Society of America - San Diego, CA, United States
    Duration: 7 Nov 198311 Nov 1983
    Conference number: 106

    Conference

    Conference106th Meeting of the Acoustical Society of America
    Number106
    CountryUnited States
    CitySan Diego, CA
    Period07/11/198311/11/1983

    Bibliographical note

    Copyright (1983) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

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