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The diagnosis of herniated intervertebral disks with MR imaging: a comparison of gradient-refocused-echo and

S Murayama1, Y Numaguchi, A E Robinson

  • 1Department of Radiology, Tulane University Medical Center, New Orleans, LA 70112.

AJNR. American Journal of Neuroradiology
|January 1, 1990
PubMed

Insights

Gradient-refocused-echo (GRE) and spin-echo (SE) magnetic resonance imaging (MRI) techniques effectively detect herniated nucleus pulposus. Combining GRE and SE MRI enhances the detection of prolapsed and extruded lumbar disks.

Area of Science:

  • Radiology
  • Medical Imaging
  • Orthopedics

Background:

  • Lumbar disk herniation is a common condition affecting the spine.
  • Accurate imaging is crucial for diagnosing and managing herniated nucleus pulposus.
  • Magnetic resonance imaging (MRI) is a primary modality for visualizing spinal structures.

Purpose of the Study:

  • To evaluate the effectiveness of gradient-refocused-echo (GRE) and spin-echo (SE) MRI sequences for imaging lumbar disk herniation.
  • To compare the sensitivity of GRE and SE techniques in detecting different types of herniated nucleus pulposus.
  • To determine the optimal MRI approach for visualizing herniated lumbar disks.

Main Methods:

  • Axial MR images of 65 lumbar disks with herniated nucleus pulposus were acquired.
  • Gradient-refocused-echo (GRE) and spin-echo (SE) pulse sequences were utilized.
  • Image analysis focused on signal-to-noise ratio and contrast between cerebrospinal fluid (CSF), nucleus pulposus, and bone.

Main Results:

  • The GRE technique demonstrated higher sensitivity in detecting prolapsed disks compared to SE.
  • The SE technique was more sensitive in visualizing extruded disks.
  • A combination of axial GRE and SE sequences resulted in high overall detectability of herniated nucleus pulposus.

Conclusions:

  • The GRE technique is a valuable adjunct to SE imaging for studying herniated nucleus pulposus.
  • Combining GRE and SE MRI sequences improves the comprehensive evaluation of lumbar disk herniation.
  • Optimized MRI protocols enhance diagnostic accuracy for spinal conditions.

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