Fig. 1From: Potential of the non-weight-bearing tunnel view in diagnosing medial meniscus posterior root tear: a pilot study of X-ray characteristicsFemorotibial angle and posterior tibial slope measurements. a The femorotibial angle (FTA) is formed by two axes. The femoral anatomical axis originates from the femoral intercondylar notch point, and the tibial anatomical axis originates from the tibial plateau center. b The posterior tibial slope (PTS) was measured as the angle between the tangent to the medial tibial plateau and a line perpendicular to the posterior tibial cortexBack to article page