Fig. 1From: Intra- and inter‐observer reliability of implant positioning evaluation on a CT-based three‐dimensional postoperative matching system for total knee arthroplastyReference points of the traditional mechanical axis . a: Three-dimensional image of the femur from the anterior aspect. The traditional mechanical axis of the femur was defined as the line connecting the white dots, which indicates the center of the femoral head and the center of the medial and lateral epicondyles (black dots). b: Multi-planar reconstruction coronal image of the tibia. Traditional mechanical alignment of the tibia was defined as the axis connecting the center of the circles drawn inside the upper and lower one-third of the medullary canal of the tibiaBack to article page