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Positional lumbar imaging using a positional device in a horizontally open-configuration MR unit - initial

Yoshiko Hayashida1, Toshinori Hirai, Yasuhiro Hiai

  • 1Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.

Journal of Magnetic Resonance Imaging : JMRI
|August 19, 2007
PubMed
Summary

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Positional magnetic resonance imaging (MRI) using an open-configuration unit shows dural sac changes in the lumbar spine. Patients with chronic low back pain exhibit different positional dural sac changes, especially at degenerated discs.

Area of Science:

  • Radiology and Imaging
  • Spine Imaging
  • Biomechanical Analysis

Background:

  • Chronic low back pain affects a significant portion of the population.
  • Understanding the biomechanics of the lumbar spine is crucial for diagnosing low back pain.
  • Positional magnetic resonance imaging (MRI) offers a dynamic assessment of spinal structures.

Purpose of the Study:

  • To evaluate positional changes of the dural sac using MR images from a horizontally open-configuration unit.
  • To compare these positional changes between healthy volunteers and patients with chronic low back pain.

Main Methods:

  • 15 patients with chronic low back pain and 14 healthy volunteers underwent MRI.
  • Images were acquired using a 0.4-T horizontally open-configuration MR unit.

Related Experiment Videos

  • Lumbar spine images were captured in flexion, neutral, and extension positions to measure dural sac diameter changes.

    • Main Results:

    • The MR protocol was well-tolerated by all participants.
    • Dural sac diameter decreased in extension compared to flexion in both groups.
    • Significant differences in the rate of change of dural sac diameter were observed at degenerated discs between patients and volunteers.

    Conclusions:

    • Positional MR imaging with an open-configuration unit effectively demonstrates position-dependent changes in the dural sac.
    • Differences in positional dural sac changes at degenerated discs may distinguish patients with chronic low back pain from healthy individuals.