RESUMO
The stabilizing anterior cruciate ligament prevents anterior translation and abnormal internal rotation of the tibia during standing and walking. Its disruption lead to loss of stability and potential significant dysfunction. This work was performed to evaluate the role of MRI in diagnosis of ACL injuries. This study was carried out on 50 patients with anterior cruciate ligaments injuries. They were classified into acute and chronic tears according to the time interval between injury and time of examination. All were examined by Magnetic Resonance Imaging [MRI] and by knee arthroscopy. A variety of MR signs were encountered and were classified into primary and secondary signs. Correlation of MR findings with arthroscopic findings was done revealing sensitivity, specificity, and accuracy of MR to be 88.8%, 50%, 81.8%. Accordingly, MRI is a non invasive reliable and versatile method of ACL tears assessment with a good sensitivity