Value of MRI diagnosis of degenerative knee joint lesions and its imaging features
Objective To explore the changes in MRI imaging features of degenerative lesions of the knee joint and analyze the diagnostic value of MRI quantitative indicators for it.Methods A total of 162 patients with suspected degenerative lesions of the knee joint who were admitted to Minda Hospital,Hubei University for Nationalities from February 2019 to April 2023 were selected.Before examination,patients rested for 30 min before undergoing MRI scans,and measured the T1,T2,T2* values of the medial and lateral condyles,as well as the patellar fat fraction(FF)values.Knee arthroscopy was performed within 1 week after MRI scanning,and the patients were divided into observation group(n=93)and control group(n=69)according to whether the microscopic findings were consistent with degenerative lesions of the knee joint.The MRI indexes of the two groups were compared,and the diagnostic value of each index for degenerative lesions of the knee joint was analyzed by ROC curve.Results The detection rate of articular cartilage degeneration by routine MRI scanning was only 66.67％,and the detection rate of meniscus degeneration was 61.53％.The detection rates of hyperostosis at the joint margin,joint cavity stenosis,and joint effusion were 89.47％,92.86％,and 93.33％,respectively.The medial condylar T1 value,medial condylar T2 value,medial condylar T2* value,lateral condylar T1 value,lateral condylar T2 value,lateral condylar T2* value and FF(％)of the patients in the observation group were higher than those in the control group,and the difference was statistically significant(P<0.05).ROC analysis results showed that the cutoff values of medial condylar T1,medial condylar T2,medial condylar T2*,lateral condylar T1,lateral condylar T2,lateral condylar T2* and FF for the diagnosis of degenerative lesions of the knee joint were 1018.92,39.27,22.34,994.71,39.91,22.74,79.18％,respectively,and the AUCs were 0.911,0.892,0.619,0.813,0.904,0.917,0.791(P<0.05).Conclusion Routine MRI scanning has a low detection rate for articular cartilage degeneration and meniscus degeneration.The values of medial condyle T1,medial condyle T2,medial condyle T2*,lateral condyle T1,lateral condyle T2,lateral condyle T2* and FF(％)can be used for the diagnosis of degenerative lesions of the knee joint.
degenerative lesions of the knee jointMRIdiagnostic valueROC curve analysis
万方数据
维普
