膝軟骨損傷におけるMRI検査の有用性と限界 : 関節鏡所見との比較

概要

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The usefulness of MRI as compared to arthroscopy in the detection of cartilage lesions was studied in nine subjects with athletic injuries. Subject age averaged 34.5 years. The average period between injury and arthroscopy was 12.3 months. Two cartilage lesions, approximately less than 1 mm in depth and exhibiting no surface fibrillation, were diagnosed via arthroscopy, but were not detected via MRI. One lesion, also approximately less than 1 mm in depth and with arthroscopically-confirmed surface fibrillation, was identified by MRI as a lesion within the subchondral layer. Of four cartilage lesions reaching the subchondral bone, arthroscopic and MRI examinations indicated different lesion depths in each case. In particular, two of these lesions had pronounced surface fibrillation and were actually deeper than estimated via arthroscopy. Arthroscopy and MRI indicated identical lesion depths in only one case. The results from this study suggest that superficial cartilage lesions are more accurately detected via arthroscopy than MRI. MRI is useful, however, in determining the depth of those lesions in which arthroscopy was unsuccessful.
1996-07-25