Fig. 1From: Radiographic measurement of the posterior tibial slope in normal Chinese adults: a retrospective cohort studyThe measurement method of posterior tibial slope (PTS)*. *X-ray lateral inspection: line 1 is the tangent line of the proximal tibia on the anterior cortex surface, line 2 is the perpendicular to line 1, and line 3 is the tangent line of the tibial plateauBack to article page