Detection of periarticular urate deposits with dual energy CT in patients with acute gouty arthritis

摘要

The gold standard for establishing the diagnosis of gouty arthritis is the detection of monosodium urate (MSU) crystals in syn-ovial fluid or periarticular tophi. The European League Against Rheumatism recommendations from 2006 state that 'for typical presentations of gout a clinical diagnosis alone is reasonably accurate but not definitive without crystal confirmation'. In addition, various imaging methods can help to non-invasively support the diagnosis of gout. Joint ultrasonography can detect MSU deposits at cartilaginous surfaces ('double contour sign') as well as periarticular tophus formation.