Fig. 2

The coronal plane of the knee MRI shows the measurement of the NWs and the BW. 2A) AA” is the baseline, BB” is the BW at the level of the popliteal groove, CC” is the NW, and the NWI is equal to CC”/BB”. 2B) AA’ is the baseline, which is a proximal tangent of the lateral and medial femoral condyles. All the measurement of the notch width is in the same orientation as the baseline. BB’ is the NW at the notch inlet (NW_in), CC’ is the NW at the ACL attachment (NW_aa), DD’ is the NW at the notch outlet (NW_ou)