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 language | English (US) |
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Pages (from-to) | 1023-1029 |
Number of pages | 7 |
Journal | Journal of the Acoustical Society of America |
Volume | 76 |
Issue number | 4 |
DOIs | |
State | Published - Oct 1984 |
ASJC Scopus subject areas
- Arts and Humanities (miscellaneous)
- Acoustics and Ultrasonics