ABSTRACT
Objective To determine the diagnostic value of indirect MRI arthrography for meniscal tears.Methods 75 cases of routine MRI of the knee and 64 cases of indirect MRI arthrography of the knee were retrospectively reviewed.These patients all had subsequently arthroscopic examination.Based on the results of arthroscopic examination,the diagnostic value for meniscal tear of routine MRI and indirect MRI arthrography were compared.Results For medial meniscal tears,the indirect MRI arthrography gave a sensitivity of 72%,specificity of 100%,accuracy of 89.1%,positive predictive value of 100% and negative predictive value of 84.8%.For lateral meniscal tears,the indirect MRI arthrography gave a sensitivity of 83.8%,specificity of 90.9%,accuracy of 87.5%,positive predictive value of 89.6% and negative predictive value of 85.7%.No matter for medical meniscal tears or lateral meniscal tears,the diagnostic differences between the indirect MRI arthrography and the routine MRI were not statistical significant.Conclusion Although the diagnostic value of indirect MRI arthrography for meniscal tears was quite high,it was not different with routine MRI statistically.