Acoustic backscattering from ultrasonically tissuelike media

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Abstract
The acoustic backscattering coefficients of a tissue-mimicking (TM) material were measured using a modified Sigelmann-Reid technique in order to assess the similarity of its acoustic properties to those of soft tissues. A simple reference scatter material was used to probe the strengths and the limitations of the measurement technique. Backscatter coefficients measured from the TM material exhibit a frequency dependence of the form fm in the range 1.0-8.0 MHz where 3.5 .ltoreq. m .ltoreq. 3.8. The backscatter coefficient is also found to be approximately proportional to the particle concentration in the TM material up to concentrations that yield an attenuation coefficient of 0.9 db(decibel)/cm per MHz. Comparisons of backscatter coefficients measured from the TM material are made with published values for liver, myocardium and blood.
Funding Information
  • National Cancer Institute (5‐P01‐CA‐19278, 5‐R01‐25634)