Inversion of Lamb waves in Shearwave Dispersion Ultrasound Vibrometry(SDUV)

Ivan Z. Nenadic, Matthew W. Urban, Scott A. Mitchell, James F. Greenleaf

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

2 Scopus citations

Abstract

Close to half of the heart failures are due to diastolic dysfunction whichis accompanied by stiffening of the left-ventricular myocardium. Our group hasrecently proposed the use of Shearwave Dispersion Ultrasound Vibrometry (SDUV)to excite and track Lamb waves to quantify viscoelasticity of the myocardium.SDUV measures dispersion velocities using the phase gradient method whichassumes presence of a single wave mode and absence of wave reflections. Directinversion is a method for estimating wave velocity and attenuation that onlyrequires the displacement versus time signal and is therefore more robust. Inthis study, we compare the results of measuring Lamb wave velocity andattenuation using the phase gradient and amplitude decay, and the directinversion.

Original languageEnglish (US)
Title of host publication2010 IEEE International Ultrasonics Symposium, IUS 2010
Pages1632-1635
Number of pages4
DOIs
StatePublished - Dec 1 2010
Event2010 IEEE International Ultrasonics Symposium, IUS 2010 - San Diego, CA, United States
Duration: Oct 11 2010Oct 14 2010

Publication series

NameProceedings - IEEE Ultrasonics Symposium
ISSN (Print)1051-0117

Other

Other2010 IEEE International Ultrasonics Symposium, IUS 2010
CountryUnited States
CitySan Diego, CA
Period10/11/1010/14/10

Keywords

  • Lamb waves
  • heart
  • shear waves
  • viscoelasticity

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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