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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.