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Table 2 Grading of MRI changes at the sacroiliac joints and global assessment

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

Name of the MRI changes Grading
BMO Slight
Moderate
Severe
  Intensity of BMO Normal or slightly increased intensity
Pronounced increased
  Depth of BMO Normal to moderate depth
Pronounced
FMD Slight
Moderate
Severe
  Depth of FMD Normal to moderate
Pronounced
Erosions Slight
Moderate
Severe
Subchondral sclerosis Slight
Moderate
Severe
Ankylosis Partial
Total
Global assessment: ‘This patient has SpA’1 Strongly disagree
Disagree
Neither agree or disagree
Agree
  Strongly agree
  1. BMO: Bone marrow oedema, FMD: fatty marrow deposition, Pronounced increased: Signal intensity comparable with that of the spinal fluid and covering an area of ≥1 cm2. Pronounced: Oedema extending ≥1 cm beneath the joint surface and covering ≥1 cm2. Slight: < 25% of the subcortical bone area, Moderate: 25% - <50% of the subcortical bone area, Severe: ≥50% of the subcortical bone area. 1Assessed on the entire MRI examination, not only the SIJ.