Extraction of Propagating Waves in Cine Images from Magnetic Resonance Elastography

J. A. Smith, R. L. Ehman

Research output: Contribution to specialist publicationArticle

3 Scopus citations

Abstract

Magnetic resonance elastography (MRE) is currently being developed to quantitatively image the elastic properties of tissue. A medical imaging technique capable of quantitatively mapping tissue elasticity is of interest because disease can affect tissue elasticity. The goal of this work is to develop image processing techniques that will accurately relate shear wave velocity to tissue elasticity. When processing the images of shear wave displacements, it is difficult to separate the modes of tissue motion: propagating waves, reflections, vibrations and background motion. We hypothesize that accurate velocity measurements can be obtained by separating the propagating waves from the other modes. The desired modes are filtered by taking the 3D (two spatial dimension and one temporal dimension) fast Fourier transform (FFT) of the displacement images and extracting the spatial and temporal frequencies which constitute a mode. The measured velocities from a single mode will reflect the elastic properties of the tissue and provide a better understanding of the tissue's response to varying conditions.

Original languageEnglish (US)
Pages1395-1401
Number of pages7
Volume58
No2-12
Specialist publicationMaterials Evaluation
StatePublished - Dec 1 2000

Keywords

  • Acoustic wave propagation
  • Image processing
  • Magnetic resonance elastography
  • Mode filtering
  • Three dimensional Fourier transform

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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