Fig. 3From: Three-dimensional morphological analysis of the femoral neck torsion angle—an anatomical studyThe long axial plane. The red plane is the coronal plane of proximal femur, and the positions of the FNI and FNB are intersected by two black planes. The green plane is the long axial planes of the FNI, and the blue plane is the long axial plane of the FNB.Back to article page