Fig. 2From: Anatomical variation of the sacroiliac joints: an MRI study with synthetic CT imagesSchematic drawing and corresponding synthetic CT images of sacroiliac joint (SIJ) variations, all shown in semi-axial plane: (1) bipartite iliac bony plate, (2) accessory SIJ, (3) iliosacral complex, (4) semicircular defect, (5) crescent ilium, (6) isolated synostosis, (7) unfused ossification center, and (8) dysmorphic sacrumBack to article page