Measurements of viscoelasticity using the MR Elastography and Lamb wave Dispersion Ultrasound Vibrometry (LDUV)

Ivan Z. Nenadic, Sara Aristizabal, Kevin J. Glaser, Tye C. Humphrey, Scott A. Mitchell, James F Greenleaf

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

Abstract

Lamb wave Dispersion Ultrasound Vibrometry (LDUV) is an ultrasound-based technique for measuring viscoelasticity of soft tissues with plate-like geometry. The technique uses a mechanical actuator or focused ultrasound radiation force to excite Lamb waves in the medium of interest and a pulse echo transducer to track the deformation and estimate phase velocity. Lamb wave dispersion equation is fitted to the measured Lamb wave velocity dispersion (change in phase velocity as a function of frequency) to estimate elasticity and viscosity of the medium. In this comparative study, we report measurements of elasticity and viscosity of excised porcine left-ventricular free wall myocardium, excised porcine spleen and a gelatin plate, obtained using LDUV and Magnetic Resonance Elastography (MRE). The estimated elasticity and viscosity obtained using the two methods agree within one standard deviation for all three samples.

Original languageEnglish (US)
Title of host publicationIEEE International Ultrasonics Symposium, IUS
Pages1167-1170
Number of pages4
DOIs
StatePublished - 2011
Event2011 IEEE International Ultrasonics Symposium, IUS 2011 - Orlando, FL, United States
Duration: Oct 18 2011Oct 21 2011

Other

Other2011 IEEE International Ultrasonics Symposium, IUS 2011
CountryUnited States
CityOrlando, FL
Period10/18/1110/21/11

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Keywords

  • Lamb waves
  • Shear wave Dispersion
  • the Curl operator
  • tissue viscoelasticity

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Nenadic, I. Z., Aristizabal, S., Glaser, K. J., Humphrey, T. C., Mitchell, S. A., & Greenleaf, J. F. (2011). Measurements of viscoelasticity using the MR Elastography and Lamb wave Dispersion Ultrasound Vibrometry (LDUV). In IEEE International Ultrasonics Symposium, IUS (pp. 1167-1170). [6293733] https://doi.org/10.1109/ULTSYM.2011.0287