Figure 1From: Different effects of femoral and tibial rotation on the different measurements of patella tilting: An axial computed tomography studyMeasurements of PTAs and the neighboring bone rotation of the knee. PTA-G: patella tilt angle of Grelsamer; PTA-S: patella tilt angle of Sasaki; PTA-M: modified patella tilt angle of Fulkerson; FR: femoral rotation; and TR: tibial rotation.Back to article page