Figure 2

Radiographic measurements of coronal lower extremity parameters. Image shows the femorotibial angle (FTA) which is the lateral angle at the intersection between the femoral bone axis and the tibial bone, the hip–knee–ankle angle (HKA) which is the lateral angle between the mechanical axis of the femur and the tibia), the mechanical lateral distal femoral angle (mLDFA) which is the lateral angle between the mechanical axis of the femur and the distal femur joint line, the mechanical medial proximal tibia angle (mMPTA) which is the medial angle between the mechanical axis of the tibia and proximal tibia joint line, and the mechanical lateral distal tibia angle (mLDTA) which is the angle between the tibial mechanical axis and distal tibial joint surface.