Fig. 2From: Application of the pedicle axis view in percutaneous screw placement for type III fracture dislocation of the sacroiliac jointThe angle formed by the longitudinal axis of the pedicle and the coronal plane (f angle) and the angle formed by the longitudinal axis of the pedicle and the transverse position (e angle). The tilt angle of the C-arm machine to the head is equal to the e angle, and the horizontal rotation angle of the C-arm machine is equal to the f angleBack to article page