Nonlinear acoustic wave propagation in tissue medium

D. R. Gandhi, W. D. O'Brien

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Measurements to comply with labeling standards and FDA requirements for diagnostic equipment are performed in water, a medium readily available and easy to use. To predict the fields in tissue, an attenuating and absorbing medium, the FDA has established a derating factor of 0.3 dB/cm-MHz. This model, however, is based on a simple linear model which does not take into account the nonlinearity of the medium nor does it consider the effects of diffraction. The Khokhlov-Zabolotskaya-Kuznetsov (KZK) model for nonlinear thermoviscous diffractive waves is utilized. Using this model, the acoustic pressure amplitudes along the beam axis for the fundamental and the second and third harmonics are examined for a plane piston transducer of uniform excitation. Due to the presence of nonlinearities, the dissipation of energy due to attenuation, and acoustic saturation, the FDA derating underestimates the output pressure fields in tissue using simulations based on the KZK model.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Ultrasonics Symposium
PublisherPubl by IEEE
Pages939-942
Number of pages4
ISBN (Print)0780312783
StatePublished - Dec 1 1993
EventProceedings of the IEEE 1993 Ultrasonics Symposium - Baltimore, MD, USA
Duration: Oct 31 1993Nov 3 1993

Publication series

NameProceedings of the IEEE Ultrasonics Symposium
Volume2
ISSN (Print)1051-0117

Other

OtherProceedings of the IEEE 1993 Ultrasonics Symposium
CityBaltimore, MD, USA
Period10/31/9311/3/93

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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