Fig. 3From: Anatomic femoral tunnel position in medial patellofemoral ligament reconstruction: anterior versus posteriorMeasurement of the CSA. The lining along the aperture boundary was recorded for the CSA of the femoral tunnel using the freehand technique. (A) CSA on CT at 1Â day postoperatively, (B) CSA on MRI at 2 years postoperatively. CSA, cross-sectional area; CT, computed tomography; MRI, magnetic resonance imagingBack to article page