DIFFRACTION OF ULTRASOUND BY SOFT TISSUES: THE INHOMOGENEOUS CONTINUOUS MODEL.

C. M. Sehgal, J. F. Greenleaf

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

1 Scopus citations

Abstract

In this paper the theory of wave propagation in continuous-inhomogeneous media is utilized to explain scattering of ultrasound by soft tissues. When a number of scattering volume elements are present, as opposed to one, the scattered energy from a given volume element subsequently encounters other scattering volume elements. As a result of this, the sound energy is diffused instead of being propagated as well-defined waves. This means that the phase relationships are lost and the radiation becomes incoherent somewhat in the fashion described by Foldy. If one were to freeze the ensemble to one instant and observe all the volume elements, each of them would appear as a secondary source emitting radiation in a different phase. Using this concept and assuming that soft tissues do not possess any sharp discontinuities, an equation for attenuation due to scattering is obtained which predicts a near linear frequency dependence for scattering-attenuation.

Original languageEnglish (US)
Title of host publicationAcoustical Imaging
Subtitle of host publicationProceedings of the International Symposium
PublisherPlenum Press
Pages217-231
Number of pages15
ISBN (Print)0306417170, 9780306417177
DOIs
StatePublished - 1984

Publication series

NameAcoustical Imaging: Proceedings of the International Symposium
Volume13
ISSN (Print)0270-5117

ASJC Scopus subject areas

  • Engineering(all)

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