Fig. 2

PD MR images of a 32-year-old female subject. a Line 1 was drawn through the medial border of the posterior cruciate ligament to form a 90° angle with the posterior tibial condylar line. b Line 2 was drawn in parallel to line 1 from the center of the patellar tendon (closest to the tibial tubercle) extending to the original posterior condylar line. The distance between lines 1 and 2 represents the PT-PCL