ABSTRACT
Objective To explore the value of dual energy CT imaging in the diagnosis of gouty tophus deposition.Methods Sixty-five cases of patients with gout treated in this hospital between December 2012 to December 2015 were selected.Another 65 cases of patients(rheumatoid arthritis,degenerative osteoarthritis and unexplained leg pain) were selected as control group.The re sults of dual energy CT imaging between two group were compared.Three experienced clinicians who didn't understand the imaging results were selected.They had a medical history and physical examination in patients with gout.The differences between clinical evaluation and imaging results were compared.Results Dual energy CT imaging showed that there were no tophi deposition in con trol group;the topi deposition in wrist joint,knee joint and ankle joint were 6.06％oo (33/34),100.00％ (22/22) and 96.49％ (55/57) in gout group.Dual energy CT imaging detected a total of 545 parts of tophus deposition.It was 4.36 times of the result of clinical evaluation(125 parts).Conclusion Dual energy CT imaging shows the advantages of simple noninvasive,high accuracy and low rate of misdiagnosis in diagnosing gout nodules.