Cerebral AngiographyAngiographyCerebral ArteriesMagnetic Resonance AngiographyAngiography, Digital SubtractionCoronary AngiographyArteriesIntracranial AneurysmCerebral InfarctionSubarachnoid HemorrhageIntracranial Arteriovenous MalformationsTomography, X-Ray ComputedVertebral ArteryCarotid Artery, InternalBasilar ArteryCarotid ArteriesCerebrovascular CirculationMiddle Cerebral ArteryCerebral VeinsCranial SinusesMoyamoya DiseaseCarotid Artery DiseasesIschemic Attack, TransientCerebral HemorrhageCircle of WillisAneurysm, RupturedCerebrovascular DisordersPosterior Cerebral ArteryCentral Nervous System Vascular MalformationsArterial Occlusive DiseasesBrain IschemiaPulmonary ArteryEmbolization, TherapeuticMagnetic Resonance ImagingIntracranial Embolism and ThrombosisCerebral RevascularizationCerebral Arterial DiseasesCarotid StenosisVasospasm, IntracranialFluorescein AngiographyRadial ArteryRenal ArteryFemoral ArteryVertebrobasilar InsufficiencyContrast MediaAnterior Cerebral ArteryBrainCerebral PalsyTemporal ArteriesVasculitis, Central Nervous SystemInfarction, Middle Cerebral ArteryIntracranial ArteriosclerosisMesenteric ArteriesSinus Thrombosis, IntracranialArteriovenous FistulaEndarterectomyTreatment OutcomeConstriction, PathologicCraniotomyCoronary Artery BypassProspective StudiesBlindness, CorticalArteriovenous MalformationsIntracranial EmbolismVertebral Artery DissectionEpilepsy, Tonic-ClonicIliac ArteryCollateral CirculationNeurologic ExaminationNeurosurgical ProceduresSensitivity and SpecificityBlood Flow VelocityCoronary VesselsTime FactorsFollow-Up StudiesCarotid Artery ThrombosisRetrospective StudiesHematoma, SubduralCranial Fossa, AnteriorCarotid-Cavernous Sinus FistulaCavernous SinusSubclavian ArterySurgical InstrumentsCatheterizationMammary ArteriesUltrasonography, Doppler, TranscranialHematoma, Subdural, IntracranialMalaria, CerebralCoronary StenosisLateral Medullary SyndromeAneurysm, InfectedComaRupture, SpontaneousHematomaRisk FactorsStrokeCeliac ArteryIntracranial HemorrhagesRadionuclide AngiographyHepatic Artery