Fig. 2

Measurement of LFCR: A In the sagittal T1 centre of the knee MRI, 2 circles were drawn in the centre of the femoral axis to determine the long axis of the distal femur. The more distant circle was placed at the nearest end of the tackle. The line passing through the centre of the two circles was considered to be the long axis of the distal shaft of the femur (segment 1). B In the sagittal T1 MRI centre of the lateral condyle of the femur, the long axis of the distal femur (segment 1) was replicated. The axis of the femoral condyle was then determined by drawing a line (line segment 2) between the last point of the lateral condyle (point B) and the most anterior point (point A). The distance from the intersection of the two lines (point O) to the last point of the condyle was divided by the total length of the condyle, i.e., OB/AB. This ratio was defined as the lateral femoral condyle ratio