18 year-old male with rupture of previous left knee ACL reconstruction. Evaluate tunnel position.IMAGE ACQUISITIONS: CT of the left knee; IV administration of 80 cc of iodinated contrast at 2 cc/sec. Transverse, coronal, sagittal re-formations provided. Patient is status post ACL reconstruction, although the graft appears disrupted as seen on recent MRI study. The tibial tunnel begins at the intercondylar eminence between the medial and lateral tibial spines and courses anteriorly and medially through the proximal tibia, breaching the anteromedial cortex. The slope of the tunnel is greater than that of Blumenstadt's line.The femoral tunnel originates near the junction of the physeal scar and posterior femoral cortex and courses superomedially, where it intersects with two tunnels created by crossed pins.Please note that the ACL itself is not well seen on this CT study nor are the menisci. The PCL is seen on the sagittal reformatted images. A small joint effusion is noted. The remaining visualized bone and soft tissue structures are within normal limits.
Postoperative changes as described above.