Fig. 1From: Urate crystal deposition and bone erosion in gout: ‘inside-out’ or ‘outside-in’? A dual-energy computed tomography studySagittal images of the metatarsal heads from different patients. Images show examples of (a) urate deposition inside the joint but not in contact with bone, (b) urate deposition in contact with bone and within an erosion, and (c) urate deposition in contact with bone and on the surface of bone. Urate is colour-coded as green and bone as purple Back to article page