Fig. 1From: Angulation error assessment for the trajectory in the anteroposterior and lateral fluoroscopic views during percutaneous endoscopic transforaminal lumbar discectomyAP (A) and lateral (B) fluoroscopic views during percutaneous endoscopic transforaminal discectomy. There is often a large difference between the cephalad angulations of the trajectory observed from the AP and lateral fluoroscopic viewsBack to article page