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Modic Type 1 Changes: Detection Performance of Fat-Suppressed Fluid-Sensitive MRI Sequences.

Tim Finkenstaedt1, Filippo Del Grande2, Nicolae Bolog3

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Fat-suppressed fluid-sensitive MRI sequences detect more Modic 1 changes in the lumbar spine than standard T1w/T2w imaging. These advanced sequences also reveal a greater extent of these end-plate changes, improving diagnostic accuracy.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Spine Imaging

Background:

  • Modic 1 end-plate changes are indicative of active disc degeneration.
  • Conventional T1-weighted (T1w) and T2-weighted (T2w) MRI sequences may not optimally detect these changes due to fat signal interference.
  • Advancements in MRI techniques are crucial for accurate diagnosis of spinal pathologies.

Purpose of the Study:

  • To compare the diagnostic performance of fat-suppressed fluid-sensitive MRI sequences against standard T1w/T2w sequences for detecting Modic 1 end-plate changes.
  • To evaluate the extent of Modic 1 changes as visualized by different MRI sequences.

Main Methods:

  • Retrospective analysis of sagittal T1w, T2w, and fat-suppressed fluid-sensitive MRI images from 100 patients (500 vertebral segments).
  • Assessment of Modic 1 changes presence and extension (height, volume, end-plate involvement) using both sequence types.
  • Statistical comparison using McNemar and Wilcoxon-signed-rank tests.

Main Results:

  • Fat-suppressed fluid-sensitive sequences identified significantly more Modic 1 changes (156 segments) compared to T1w/T2w sequences (93 segments) (p < 0.001).
  • A significantly greater extension (height, volume, end-plate) of Modic 1 changes was observed with fat-suppressed sequences (p < 0.05).
  • Changes detected exclusively on fat-suppressed sequences were smaller than those visible on both sequence types (p < 0.05).

Conclusions:

  • Fat-suppressed fluid-sensitive MRI sequences demonstrate superior performance in detecting Modic 1 end-plate changes compared to standard T1w/T2w imaging.
  • These sequences provide a more comprehensive assessment of the extent of Modic 1 changes.
  • The findings suggest a potential need to re-evaluate the conventional definition and detection criteria for Modic 1 changes in modern MRI practice.