Diagnostic performance for ligamentous, meniscal, and cartilaginous lesions
ligamentous lesions, osseocartilaginous injuries
The three radiologists (J.L., N.L., and Y.L.) formed a consensus on grading meniscal lesions, detecting ligamentous lesions, and grading cartilage by reviewing MR images of non-enrolled patients together before evaluation. The radiologists were blinded to the medical records associated with the images acquired for this study. Three radiologists independently evaluated the knee MRI studies for meniscal, tendinous, ligamentous, and osseocartilaginous injuries. For diagnostic performance analysis, all MRI findings and clinical medical records were reviewed to form a reference standard by two additional reviewers (Y.H.L. and M.J.).The diagnostic criteria for meniscal tears were the presence of abnormal signal intensity within the meniscus extending to the meniscal articular surface and abnormal morphology of the meniscus (0, normal; 1, tear)For qualitative analyses of cartilage grading, the radiologists used the Outerbridge classification system