MRI of normal ACL and with avulsion injuries

Image A and B are sagittal projections of the knee using proton density fat saturated sequences. Image A shows a normal ACL (arrowheads). Image B shows a full thickness tear (arrow) and fraying of the proximal and distal components (arrowheads). Image C is a sagittal image of the knee using T2 weighted, fast spin echo technique and shows complete avulsion of the ACL at its insertion on to the tibia (arrow), and normal proximal ligament (arrowhead).