title: Variations of the vertebrobasilar circulation and its impact on the neurosurgical interventions.
authors.affiliation: Agri Military Hospital, Department of Radiology, Agri, Turkey.
authors.forename: Salih
authors.initials: S
authors.lastname: Hamcan
authors.affiliation: Gulhane Military Medical School, Department of Radiology, Ankara, Turkey.
authors.forename: Yalcin
authors.initials: Y
authors.lastname: Bozkurt
authors.affiliation: Gulhane Military Medical School, Department of Radiology, Ankara, Turkey.
authors.forename: Veysel
authors.initials: V
authors.lastname: Akgun
authors.affiliation: Gulhane Military Medical School, Department of Radiology, Ankara, Turkey. Electronic address: bilbat_23@yahoo.com.
authors.forename: Bilal
authors.initials: B
authors.lastname: Battal
mesh_terms: D001933:Brain Stem / Q000033:anatomy & histology*; D002531:Cerebellum / Q000033:anatomy & histology*; D002536:Cerebral Arteries / Q000033:anatomy & histology*; D020546:Fourth Ventricle / Q000033:anatomy & histology*; D006801:Humans; D008866:Microsurgery / Q000379:methods*; D019635:Neurosurgical Procedures / Q000379:methods*
keywords: Anatomy; Basilar artery; CT; MR; PICA; Variation; Vertebral artery