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. 2017 Mar 10;6:247. [Version 1] doi: 10.12688/f1000research.9402.1

Figure 1. New imaging modalities for demonstrating serum urate deposition.

Figure 1.

( A) Musculoskeletal ultrasound of a first metatarsal phalangeal joint (plantar longitudinal view) demonstrating a classic “double contour sign” (arrows), indicating the deposition of monosodium urate (MSU) crystals on the cartilage surface of the metatarsal head. ( B) Dual-energy computed tomography of a foot. Green areas indicate MSU deposition, and arrows indicate the presence of MSU deposition at the first distal interphalangeal joint, at the carpal metacarpal joint, and along the Achilles tendon.