Magnetic resonance (MR) imaging examinations were performed on 37 knees after anterior cruciate ligament (ACL) reconstruction with iliotibial autograf is . Ti, T 2 and proton-weighted sagittal images were obtained. T1 weighted images were clearly visible in only three cases (8%). In contrast, using T2 and proton-weighted images, the results of 35 of the cases (95%) were clearly visible. The other two cases had ill-defined images, which revealed that the reconstructed ACL was loose. It was

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... ded from this that T2 and proton-weighted images are suitable for evaluating reconstructed ACL. In comparison with the normal ACL in T2 and proton-weighted images, the reconstructed ACL showed a high signal at the tibial side and a linear high density line within the graft. The high signal at the tibia! side was found to be caused by roof impingement.