| Objective To explore the accuracy of MRI in the diagnosis of gouty knee arthritis.Methods Dual-energy CT and MRI imaging of knee joints in 31 patients with chronic gout in Zhangjiagang Aoyang Hospital from July 2015 to February 2019were retrospectively analyzed.Using dual energy CT as the gold standard, the sensitivity, specificity, positive predictive value, negative predictive value and accuracy of MRI detection of tophiwere evaluated.Results Four patients underwent bilateral knee joint dual-energy CT and MRI examination. A total of 35 cases of knee joints were included in the study. The specificity of MRI for tophi was 0.977 (95% CI 0.930, 0.994), the sensitivity was 0.648 (95% CI 0.551, 0.735), the positive predictive value was 96.0%, and the negative predictive value was 77.0%, with an accuracy of 82.8%.Conclusion Compared with dual-energy CT, MRI has higher specificity and accuracy, thus it has a good potential in the diagnosis of gout arthritis. |
