Fig. 1

Evaluation of the deformed proximal femur. a The reference plane was defined as the plane passing through the proximal most posterior point of the femur (white line) and bilateral posterior femoral condyle. The location of the measurement was the axial image sliced 5 mm proximal from the lesser trochanter (white dotted line). b The ratio of the anteroposterior and mediolateral diameters of the femur was calculated by measuring the anteroposterior (white dotted line) and mediolateral diameters (white line) of the femur in the axial image sliced