Feasibility of MR elastography of the intervertebral disc

Ephraim I. Ben-Abraham, Jun Chen, Joel P. Felmlee, Phil Rossman, Armando Manduca, Kai Nan An, Richard Lorne Ehman

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Low back pain (LBP) is a costly and widely prevalent health disorder in the U.S. One of the most common causes of LBP is degenerative disc disease (DDD). There are many imaging techniques to characterize disc degeneration; however, there is no way to directly assess the material properties of the intervertebral disc (IVD) within the intact spine. Magnetic resonance elastography (MRE) is an MRI-based technique for non-invasively mapping the mechanical properties of tissues in vivo. The purpose of this study was to investigate the feasibility of using MRE to detect shear wave propagation in and determine the shear stiffness of an axial cross-section of an ex vivo baboon IVD, and compare with shear displacements from a finite element model of an IVD motion segment in response to harmonic shear vibration. MRE was performed on two baboon lumbar spine motion segments (L3–L4) with the posterior elements removed at a range of frequencies (1000–1500 Hz) using a standard clinical 1.5 T MR scanner. Propagating waves were visualized in an axial cross-section of the baboon IVDs in all three motion-encoding directions, which resembled wave patterns predicted using finite element modeling. The baboon nucleus pulposus showed an average shear stiffness of 79 ± 15 kPa at 1000 Hz. These results suggest that MRE is capable of visualizing shear wave propagation in the IVD, assessing the stiffness of the nucleus of the IVD, and can differentiate the nucleus and annulus regions.

Original languageEnglish (US)
Pages (from-to)132-137
Number of pages6
JournalMagnetic Resonance Imaging
Volume39
DOIs
StatePublished - Jun 1 2017

Fingerprint

Elasticity Imaging Techniques
Intervertebral Disc
Magnetic resonance
Papio
Shear waves
Stiffness
Wave propagation
Low Back Pain
Spine
Intervertebral Disc Degeneration
Magnetic resonance imaging
Vibrations (mechanical)
Materials properties
Vibration
Health
Tissue
Imaging techniques
Mechanical properties

Keywords

  • Baboon
  • Disc degeneration
  • Finite element
  • Intervertebral disc
  • Magnetic resonance elastography
  • Shear stiffness

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

Cite this

Feasibility of MR elastography of the intervertebral disc. / Ben-Abraham, Ephraim I.; Chen, Jun; Felmlee, Joel P.; Rossman, Phil; Manduca, Armando; An, Kai Nan; Ehman, Richard Lorne.

In: Magnetic Resonance Imaging, Vol. 39, 01.06.2017, p. 132-137.

Research output: Contribution to journalArticle

Ben-Abraham, Ephraim I. ; Chen, Jun ; Felmlee, Joel P. ; Rossman, Phil ; Manduca, Armando ; An, Kai Nan ; Ehman, Richard Lorne. / Feasibility of MR elastography of the intervertebral disc. In: Magnetic Resonance Imaging. 2017 ; Vol. 39. pp. 132-137.
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