Two independent measurers will twicely measure the radiological features of Lateral Femoral Impaction Fracture / Lateral Femoral Notch Sign on MRIs of consecutive patients after anterior cruciate ligament (ACL) injuries and without ACL injuries. In cases without ACL injuries, radiological features of terminal sulcus (TS), a native sulcus located on the lateral femoral condyle, will be measured. Intra- and inter-rater agreements will be calculated.~The following radiological features will be assessed/ measured:~Presence of LFC-IF/ TS~LFC-IF/ TS depth~LFC-IF/ TS length~Distance from Blumensaat line to the front border of LFC-IF / TS~Distance from Blumensaat line to the deepest part of LFC-IF / TS~Distance from Blumensaat line to the rear border of LFC-IF / TS
Analysis of Radiological Features of Lateral Femoral Impaction Fracture (LFC-IF) / Lateral Femoral Notch Sign will be performed on MRIs of consecutive patients after anterior cruciate ligament (ACL) injuries and without ACL injuries.