Fig. 3

Difference between the measured distance and the estimated distance calculated by ratios. Difference values between the measured distance from landmarks to the joint line, and the estimated distance calculated from FW and mean ratios were calculated. Percentages of difference value within 4 mm or 8 mm were given on the graphs (a-h). FW femoral width, AT adductor tubercle, ME medial epicondyle, LE lateral epicondyle, TT tibial tubercle, FH fibular head, IPP the inferior pole of the patella, DJL distal joint line, PJL posterior joint line