Vertebral ArteryVertebral Artery DissectionSubclavian ArteryVertebrobasilar InsufficiencyCerebral AngiographyTomography, X-Ray ComputedArteriesBasilar ArterySubclavian Steal SyndromeLateral Medullary SyndromeCarotid ArteriesMagnetic Resonance AngiographyAneurysm, DissectingPulmonary ArteryCerebral ArteriesAngiographyIntracranial AneurysmCarotid Artery, InternalCervical VertebraeEmbolization, TherapeuticAngiography, Digital SubtractionBrain Stem InfarctionsCervical AtlasArterial Occlusive DiseasesNeck InjuriesSubarachnoid HemorrhageCarotid Artery, Internal, DissectionAxisRenal ArteryFemoral ArteryMesenteric ArteriesFibromuscular DysplasiaAneurysm, RupturedCarotid Artery, CommonOccipital BoneMammary ArteriesCarotid Artery DiseasesCerebellar DiseasesStentsAneurysm, FalseIliac ArteryAtlanto-Axial JointCoronary Artery BypassConstriction, PathologicMagnetic Resonance Imaging