Elasticity reconstructive imaging by means of stimulated echo MRI

  • Chenevert T
  • Skovoroda A
  • O'Donnell M
 et al. 
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A method is introduced to measure internal mechanical displacement and strain by means of MRI. Such measurements are needed to reconstruct an image of the elastic Young's modulus. A stimulated echo acquisition sequence with additional gradient pulses encodes internal displacements in response to an externally applied differential deformation. The sequence provides an accurate measure of static displacement by limiting the mechanical transitions to the mixing period of the simulated echo. Elasticity reconstruction involves definition of a region of interest having uniform Young's modulus along its boundary and subsequent solution of the discretized elasticity equilibrium equations. Data acquisition and reconstruction were performed on a urethane rubber phantom of known elastic properties and an ex vivo canine kidney phantom using

Author-supplied keywords

  • Elastic Young's modulus
  • Elastography
  • Magnetic resonance imaging
  • Strain imaging

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  • Thomas L. Chenevert

  • Andrei R. Skovoroda

  • Matthew O'Donnell

  • Stanislav Y. Emelianov

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