Thirty-eight knees with clinically suspected meniscal tears were examined with high-resolution computed tomography(HRCT) immediately following double contrast arthrography. All subsequently underwent arthroscopy. The findings of postarthrogram HRCT and arthroscopy were compared to evaluate the usefulness of postarthrogram HRCT in diagnosis of the meniscal tears, The sensitivity, specificity and accuracy of HRCT were 96.2%, 83.3% and 92.1% respectively. The anatomic details of the meniscal teas were clearly visible on the HRCT scan. Sagittal and coronal reformation views well visualized the horizantal tears and the relationship of torn meniscal fragments, and well differentiated th peripheral tears form the synovial recess. Our results indicate that postarthrogram HRCT not only is a sensitive and effective method for the detection and characterization of the meniscal tears, but also provides arthroscopists with the appropriate surgical plans.