Carotid Artery, InternalCarotid Artery DiseasesCarotid ArteriesCarotid StenosisCarotid Artery, ExternalCarotid Artery, CommonCarotid Artery, Internal, DissectionCarotid Artery ThrombosisEndarterectomy, CarotidCerebral AngiographyAngiography, Digital SubtractionArterial Occlusive DiseasesMagnetic Resonance AngiographyIntracranial AneurysmArteriesCerebral ArteriesUltrasonography, Doppler, DuplexCerebrovascular CirculationCircle of WillisIschemic Attack, TransientVertebral ArteryCerebral RevascularizationCavernous SinusEndarterectomyAngiographyAneurysmTomography, X-Ray ComputedCerebrovascular DisordersIntracranial Embolism and ThrombosisStentsCarotid Artery InjuriesBlood Flow VelocityCollateral CirculationTunica IntimaUltrasonography, Doppler, TranscranialCerebral InfarctionMiddle Cerebral ArteryBrain IschemiaOphthalmic ArteryEmbolization, TherapeuticStrokeIntracranial EmbolismCarotid-Cavernous Sinus FistulaTunica MediaFibromuscular DysplasiaBasilar ArteryUltrasonography, Doppler, ColorAngioplasty, BalloonEpistaxisUltrasonographyPetrous BoneMoyamoya DiseaseCarotid BodyIntracranial ArteriosclerosisAmaurosis FugaxTreatment OutcomeBalloon OcclusionAngioplastyArteriosclerosisAneurysm, RupturedCranial Nerve DiseasesTemporal ArteriesHorner SyndromeCarotid SinusCatheterizationAnterior Cerebral ArteryCarotid Intima-Media ThicknessCerebral Arterial DiseasesAneurysm, FalseConstriction, PathologicSphenoid BoneInjections, Intra-ArterialMagnetic Resonance ImagingRegional Blood FlowProspective StudiesTime FactorsFollow-Up StudiesSubarachnoid HemorrhageAcetazolamidePulmonary ArterySubclavian ArteryRisk FactorsUltrasonography, DopplerRetrospective StudiesFemoral ArteryPostoperative ComplicationsBrainInfarction, Middle Cerebral ArteryRetinal Artery OcclusionSensitivity and SpecificityPredictive Value of TestsAneurysm, DissectingHemodynamicsSkull BaseNeck InjuriesRenal ArteryCranial Nerve InjuriesLigationPolyethylene TerephthalatesAuscultation