DIFFRACTION OF ULTRASOUND BY SOFT TISSUES

THE INHOMOGENEOUS CONTINUOUS MODEL.

C. M. Sehgal, James F Greenleaf

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

1 Citation (Scopus)

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: Proceedings of the International Symposium
EditorsM. Kaveh, R.K. Mueller, J.F. Greenleaf
Place of PublicationNew York, NY, USA
PublisherPlenum Press
Pages217-231
Number of pages15
Volume13
ISBN (Print)0306417170
StatePublished - 1984

Fingerprint

Diffraction
Ultrasonics
Scattering
Tissue
Radiation
Wave propagation
Acoustic waves

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Sehgal, C. M., & Greenleaf, J. F. (1984). DIFFRACTION OF ULTRASOUND BY SOFT TISSUES: THE INHOMOGENEOUS CONTINUOUS MODEL. In M. Kaveh, R. K. Mueller, & J. F. Greenleaf (Eds.), Acoustical Imaging: Proceedings of the International Symposium (Vol. 13, pp. 217-231). New York, NY, USA: Plenum Press.

DIFFRACTION OF ULTRASOUND BY SOFT TISSUES : THE INHOMOGENEOUS CONTINUOUS MODEL. / Sehgal, C. M.; Greenleaf, James F.

Acoustical Imaging: Proceedings of the International Symposium. ed. / M. Kaveh; R.K. Mueller; J.F. Greenleaf. Vol. 13 New York, NY, USA : Plenum Press, 1984. p. 217-231.

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

Sehgal, CM & Greenleaf, JF 1984, DIFFRACTION OF ULTRASOUND BY SOFT TISSUES: THE INHOMOGENEOUS CONTINUOUS MODEL. in M Kaveh, RK Mueller & JF Greenleaf (eds), Acoustical Imaging: Proceedings of the International Symposium. vol. 13, Plenum Press, New York, NY, USA, pp. 217-231.
Sehgal CM, Greenleaf JF. DIFFRACTION OF ULTRASOUND BY SOFT TISSUES: THE INHOMOGENEOUS CONTINUOUS MODEL. In Kaveh M, Mueller RK, Greenleaf JF, editors, Acoustical Imaging: Proceedings of the International Symposium. Vol. 13. New York, NY, USA: Plenum Press. 1984. p. 217-231
Sehgal, C. M. ; Greenleaf, James F. / DIFFRACTION OF ULTRASOUND BY SOFT TISSUES : THE INHOMOGENEOUS CONTINUOUS MODEL. Acoustical Imaging: Proceedings of the International Symposium. editor / M. Kaveh ; R.K. Mueller ; J.F. Greenleaf. Vol. 13 New York, NY, USA : Plenum Press, 1984. pp. 217-231
@inproceedings{43f9eb9e0fb74f44b2295b153a241458,
title = "DIFFRACTION OF ULTRASOUND BY SOFT TISSUES: THE INHOMOGENEOUS CONTINUOUS MODEL.",
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.",
author = "Sehgal, {C. M.} and Greenleaf, {James F}",
year = "1984",
language = "English (US)",
isbn = "0306417170",
volume = "13",
pages = "217--231",
editor = "M. Kaveh and R.K. Mueller and J.F. Greenleaf",
booktitle = "Acoustical Imaging: Proceedings of the International Symposium",
publisher = "Plenum Press",

}

TY - GEN

T1 - DIFFRACTION OF ULTRASOUND BY SOFT TISSUES

T2 - THE INHOMOGENEOUS CONTINUOUS MODEL.

AU - Sehgal, C. M.

AU - Greenleaf, James F

PY - 1984

Y1 - 1984

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0021615019&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0021615019&partnerID=8YFLogxK

M3 - Conference contribution

SN - 0306417170

VL - 13

SP - 217

EP - 231

BT - Acoustical Imaging: Proceedings of the International Symposium

A2 - Kaveh, M.

A2 - Mueller, R.K.

A2 - Greenleaf, J.F.

PB - Plenum Press

CY - New York, NY, USA

ER -