Circle of WillisCerebral ArteriesCollateral CirculationDNA, CircularMagnetic Resonance AngiographyManagement Quality CirclesNeuroendoscopyCarotid Artery, InternalCerebrovascular CirculationMoyamoya DiseaseCerebral AngiographyDoppler EffectAngiography, Digital SubtractionIntracranial ArteriosclerosisUltrasonography, Doppler, TranscranialBasilar ArteryHistory, 17th CenturyVertebral ArteryIntracranial AneurysmSphenoid BoneCarotid StenosisCarotid Artery, ExternalArachnoidEchoencephalographyMigraine with AuraOphthalmic ArteryCarotid-Cavernous Sinus FistulaIntracranial Arteriovenous MalformationsCranial Fossa, PosteriorSkull BaseBlood Flow VelocityCerebral InfarctionCerebrovascular DisordersPia MaterDominance, CerebralBrainImaging, Three-DimensionalBrain IschemiaSubarachnoid HemorrhageCadaverUltrasonography, Doppler, ColorArterial Occlusive DiseasesIschemic Attack, TransientCarotid ArteriesImage Processing, Computer-AssistedCarotid Artery DiseasesNamibiaDNA ReplicationTomography, X-Ray ComputedPerceptual ClosureUltrasonographyEndarterectomy, CarotidNucleic Acid Amplification TechniquesGene Rearrangement, T-LymphocyteContrast MediaStrokePlasmidsDNA, ViralDNA, Single-StrandedPrimed In Situ LabelingRegional Blood FlowNucleic Acid ConformationReference ValuesBase SequenceSensitivity and SpecificityDNA, SuperhelicalAnesthesia, Closed-CircuitThymus GlandRecombination, GeneticBacteriophage phi X 174Molecular Sequence DataForm PerceptionProspective StudiesCiliary ArteriesGestalt TheoryMicroscopy, ElectronHIV Long Terminal RepeatHandwritingNucleic Acid RenaturationDNA, CatenatedNucleic Acid DenaturationDNA NucleotidyltransferasesRepetitive Sequences, Nucleic AcidTelomereSolar SystemTransposasesKluyveromycesVirus IntegrationReaginsVirus ReplicationNebraskaStars, CelestialSize PerceptionArctic RegionsViroidsEscherichia coliDNA HelicasesDNADNA Restriction EnzymesDNA Ligases