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Table 1 Scoring system used to evaluate six consecutive semi-coronal magnetic resonance imaging slices (total score range 0–72)

From: Feasibility and reliability of the Spondyloarthritis Research Consortium of Canada sacroiliac joint inflammation score in children

Feature Definition Score range per slice Maximum score
Bone marrow edema Hyperintense signal on short-tau inversion recovery Score 4 quadrants in each sacroiliac joint 0/1, range per slice is 0–8 48
Bone marrow intensity Hyperintensity of marrow edema using the presacral veins as reference Score each sacroiliac joint 0/1, range per slice is 0–2 12
Bone marrow depth Homogeneous increase of marrow signal ≥1 cm from the articular surface within either sacroiliac joint Score each sacroiliac joint 0/1, range per slice is 0–2 12