Fig. 3

Axial view of a right knee demonstrating the normalized tibial ACL footprint location in Chinese (red dot) and Caucasian (blue dot) patients in the A/P and M/L directions. The peak of the MTS is shown with a green dot. The adjusted normalized A/P tibial footprint location according to the MTS (blue arrow) was defined as the average normalized A/P distance of the MTS from the origin of the tACS (yellow arrow) minus the normalized A/P distance of the tibial footprint from the MTS (red arrow). The adjusted normalized M/L tibial footprint location according to the MTS (dashed blue arrow) was defined as the average normalized M/L distance of the MTS from the origin of the tACS (dashed yellow arrow) plus the normalized A/P distance of the tibial footprint from the MTS (dashed red arrow). ACL anterior cruciate ligament, A/P anteroposterior, MTS medial tibial spine, M/L mediolateral, tACS tibial anatomical coordinate system