Fig. 1From: Ultrasonography and dual-energy computed tomography provide different quantification of urate burden in gout: results from a cross-sectional study a Tophus of the first metatarsophalangeal joint assessed by ultrasonography (US) (top) and dual-energy computed tomography (DECT) (bottom). b US double contour sign. c DECT scans of the knees. d DECT scans of the feetBack to article page