Article: article from journal or magazin.
Comparison between magnetic resonance imaging and arthroscopy in the diagnosis of patellar cartilage lesions: a prospective study.
Knee Surgery, Sports Traumatology, Arthroscopy
A blind and prospective study was conducted to assess the accuracy of magnetic resonance imaging (MRI) for diagnosing patellar cartilage lesions. Thirty-three consecutive patients undergoing knee arthroscopy were examined by MRI prior to surgery. Imaging was performed in the axial plane on a 1.5-Tesla unit with spin-echo and gradient-echo T1 and T2 sequences. The MRI and arthroscopic data were compared using a four-grade classification and a patellar map which divided the patellar surface into four quadrants. The overall sensitivity of MRI was 84.7% and the specificity 97.2%. The same pit-fall led to two MRI false positives. A perfect correlation of grading was obtained in 76.5%. When discordance was found, the tendency with MRI was commonly to underestimate the grade of the lesions. The MRI accuracy was high in this study in spite of a high rate of low-grade lesions which are difficult to assess. Related criteria for cartilage assessment with MRI and arthroscopy are suggested for further studies.
Adolescent, Adult, Arthroscopy/methods, Cartilage, Articular/pathology, Cartilage, Articular/physiopathology, Female, Humans, Knee Injuries/diagnosis, Knee Joint/pathology, Knee Joint/physiopathology, Magnetic Resonance Imaging/methods, Male, Middle Aged, Prospective Studies, Sensitivity and Specificity
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