Virtual endoscopy is a useful device for training and preoperative planning of transsphenoidal endoscopic pituitary surgery. - Wolfsberger,S.; Forster,MT.; Donat,M.; Neubauer,A.; Buhler,K.; Wegenkittl,R.; Czech,T.; Hainfellner,JA.; Knosp,E. (Minim Invas Neurosurg, 2004)