Magnetic Resonance AngiographyMultidetector Computed TomographyTomography, X-Ray ComputedAngiographyAngiography, Digital SubtractionMagnetic Resonance ImagingCoronary AngiographyCerebral AngiographyContrast MediaImaging, Three-DimensionalSensitivity and SpecificityTomography, Spiral ComputedGadoliniumPredictive Value of TestsGadolinium DTPAObserver VariationIntracranial AneurysmReproducibility of ResultsImage EnhancementMagnetic Resonance SpectroscopyCerebral Arterial DiseasesRadiographic Image Interpretation, Computer-AssistedImage Processing, Computer-AssistedCarotid StenosisArterial Occlusive DiseasesConstriction, PathologicArtifactsUltrasonography, Doppler, DuplexCoronary Artery DiseaseCarotid Artery, InternalRadiographic Image EnhancementCircle of WillisCoronary StenosisAortographyIopamidolProspective StudiesCerebral ArteriesVertebral ArteryRenal Artery ObstructionImage Interpretation, Computer-AssistedRetrospective StudiesVertebrobasilar InsufficiencySeverity of Illness IndexFluorescein AngiographyMagnetic Resonance Imaging, CineTreatment OutcomeCardiac-Gated Imaging TechniquesPreoperative CareCoronary VesselsRadiation DosageStentsIntracranial Arteriovenous MalformationsFeasibility StudiesAnterior Cerebral ArteryCarotid ArteriesEmbolization, TherapeuticPosterior Cerebral ArteryPulmonary VeinsAneurysm, RupturedOrganometallic CompoundsRenal ArteryTime FactorsFollow-Up StudiesMeglumineCarotid Artery DiseasesVascular MalformationsCeliac ArteryVascular PatencyCerebrovascular CirculationIncidental FindingsPhlebographyIntracranial Arterial DiseasesCollateral CirculationPositron-Emission TomographyEndarterectomy, CarotidIntracranial ArteriosclerosisCalcinosisPlaque, AtheroscleroticTomography, Emission-Computed, Single-PhotonBrainUltrasonography, Doppler, ColorBlood Vessel Prosthesis ImplantationTomographyTakayasu ArteritisDiagnostic ImagingAortic Aneurysm, ThoracicSubarachnoid HemorrhageScimitar SyndromeAortic Aneurysm, AbdominalBlood Flow VelocityUltrasonography, Doppler, TranscranialVascular CalcificationTriiodobenzoic AcidsTomography, Optical CoherenceAneurysm, DissectingROC CurveBasilar ArteryInfarction, Posterior Cerebral ArteryCerebrovascular DisordersPeripheral Vascular Diseases