Figure 2a. Focal cartilage contusion after tearing of the anterior cruciate ligament. (a) Sagittal proton-density fast SE image shows a tear of the anterior cruciate ligament (arrow). (b) Image from arthroscopy shows cartilage damage in the lateral femoral condyle (arrow). (c) Sagittal 3D spoiled GRE image shows cartilage step-off in the lateral femoral condyle (arrow). (d) Sagittal fast SE image obtained at the same location shows less detail of the cartilage (arrow).