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Gradient-echo MR imaging of the lumbar spine: comparison with spin-echo technique
A T Watanabe1, G P Teitelbaum, R B Lufkin
1Huntington Medical Research Institutes, Pasadena, CA.
Journal of Computer Assisted Tomography
|May 1, 1990
Summary
Gradient-echo (GRE) magnetic resonance (MR) imaging is not ideal for lumbar spine evaluation due to artifacts. Spin-echo (SE) technique offers superior visualization of neural foramina, epidural fat, and disk herniation in the lumbar spine.
Area of Science:
- Radiology
- Medical Imaging
- Spine Imaging
Background:
- Gradient-echo (GRE) magnetic resonance (MR) imaging is often recommended for cervical spine radiculopathy.
- The utility of GRE for lumbar spine imaging, particularly in evaluating neural structures and pathologies, requires further investigation.
Purpose of the Study:
- To compare the effectiveness of axial GRE and spin-echo (SE) MR imaging techniques for lumbar spine evaluation.
- To assess the diagnostic quality of GRE images for specific lumbar spine structures and pathologies.
Main Methods:
- Axial GRE and SE MR images of the lumbar spine were acquired in 50 patients using a 1.5 T MR system.
- Image quality was compared for visualization of neural foramina, epidural fat, and disk herniation.
Main Results:
- Spin-echo (SE) images demonstrated superior clarity for evaluating neural foramina, epidural fat, and disk herniation compared to GRE images.
- GRE images exhibited unacceptable chemical shift artifacts, rendering them inadequate for comprehensive lumbar spine assessment.
- GRE technique offered advantages in rapid T2* image acquisition and reduced motion artifact.
Conclusions:
- Axial GRE magnetic resonance imaging is currently inferior to spin-echo technique for detailed lumbar spine imaging due to significant artifacts.
- Despite limitations, advancements in GRE software and technology may enhance its future role in lumbar spine imaging.