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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.