Measurement of shear waves in tissue

James F. Greenleaf, Vinayak Dutt, Raja Muthupillai, Armando Manduca, Richard L. Ehman

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

The wavelength of a propagating pulse of shear wave within tissue is related to the local shear modulus and density through the speed of propagation. If the pulse does not produce standing waves, then the wavelength is a function of the tissue properties and not boundary conditions. Methods for imaging such waves using ultrasound and magnetic resonance imaging have recently been developed. The MRI method, termed Magnetic Resonance Elastography, can measure displacements in all three dimensions and is sensitive to motion of the order of 100 nanometers. The ultrasound method can measure in one plane very quickly and is sensitive to displacements of fractions of micrometers. Local wavelength of the propagating shear waves can be measured using specially modified filters. Shear modulus can then be estimated if density is known or assumed. Applications of this method reminiscent of palpation but in three dimensions and at any depth in the tissue are possibilities.

Original languageEnglish (US)
Pages (from-to)2172-2173
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume5
StatePublished - Dec 1 1996
EventProceedings of the 1996 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 4 (of 5) - Amsterdam, Neth
Duration: Oct 31 1996Nov 3 1996

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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