Fig. 2From: MRI evidence of structural changes in the sacroiliac joints of patients with non-radiographic axial spondyloarthritis even in the absence of MRI inflammationProportion of patients with erosion (a), backfill (b), fat metaplasia (c), and ankylosis (d) on T1 weighted spin echo (T1WSE) magnetic resonance imaging (MRI). ns nonsignificant, SPARCC Spondyloarthritis Research Consortium of Canada, SIJ, sacroiliac joint, BME bone marrow edema, ASAS Assessment of SpondyloArthritis international SocietyBack to article page