A finite element model for analyzing shear wave propagation observed in magnetic resonance elastography

Qingshan Chen, Stacie I. Ringleb, Armando Manduca, Richard L. Ehman, Kai Nan An

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Magnetic resonance elastography (MRE) is a novel non-invasive approach to determine material stiffness by using a conventional magnetic resonance imaging (MRI) system incorporated with an oscillating motion-sensitizing gradient to detect nodal displacements produced by a shear excitation wave. The effects of material properties, excitation frequency, boundary conditions, and applied tension on shear wavelength measurement must be examined before MRE can become a useful diagnostic tool. We propose finite element (FE) modeling as a robust method to systematically study the effects of these parameters. An axisymmetric FE model was generated with ABAQUS to simulate agarose gel phantoms. The effects of material stiffness, density, and excitation frequency on propagating shear wavelength were examined individually. The effect of the boundary conditions on shear wavelength was also demonstrated. Results of shear wavelength from MRE measurement were compared with the results of FE model, which showed good agreement between the methods.

Original languageEnglish
Pages (from-to)2198-2203
Number of pages6
JournalJournal of Biomechanics
Volume38
Issue number11
DOIs
Publication statusPublished - 2005 Nov

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

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