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Table 1 Grading of MRI changes in the spine

From: Spondyloarthritis-related and degenerative MRI changes in the axial skeleton - an inter- and intra-observer agreement study

Name of the MRI changes Grading
Type of signal change BMO
FMD
Mixed
  Signal change in the corner 1 Yes/No
  Location of signal change Anterior
Posterior
Equally widespread
  Size of signal change Small
Medium
Large
Total size of BMO in the DVU Small
Medium
Large
Total size of FMD in the DVU Small
Medium
Large
Total size of mixed lesions in the DVU Small
Medium
Large
Erosions None
Slight
Moderate
Severe
Erosion of the corner1 Yes/No
Syndesmophytes or vertebral fusion None
Syndesmophytes between corners
Partial osseous bridging
Total fusion
BMO at the apophyseal joints Yes/No
BMO at the costovertebral joints Yes/No
FMD at the apophyseal joints Yes/No
Soft tissue oedema Yes/No
Disc degeneration Normal height and signal intensity
Slightly decrease in height and signal intensity
Decreased height and fluid signal
Elimination of the disc height
Disc contour Broad-based protrusion
Focal protrusion
Extrusion
Sequestration (free fragment)
Disc herniation in the vertebral endplate Yes/No
Scheuermann’s changes Yes/No
  1. BMO: Bone marrow oedema, FMD: fatty marrow deposition, DVU: discovertebal unit, Small/Slight: < 25% of the subcortical bone area, Medium/Moderate: 25% - <50% of the subcortical bone area, Large/Severe: ≥50% of the subcortical bone area.