Fig. 2.

Overview of applied imaging modalities in an acute gout flare of the first metatarsophalangeal joint. The same mono sodium urate deposit marked by an arrow in different imaging modalities. A Dual energy computed tomography colour-coded image highlighting monosodium urate deposits in green. B Conventional radiograph demonstrating an irregular opacification along the medial aspect of the distal first metatarsal bone suggestive of gout. C Ultrasound showing a tophus and an erosion as well as aggregates. D Compensated polarised light microscopy of the aspirated synovial fluid confirming the diagnosis of gout by demonstrating spindle shaped deposits