Angiography, Digital SubtractionSubtraction TechniqueMagnetic Resonance AngiographyCerebral AngiographyIntracranial AneurysmRadiographic Image EnhancementIntracranial Arteriovenous MalformationsImaging, Three-DimensionalContrast MediaEmbolization, TherapeuticAngiographyTomography, X-Ray ComputedCarotid Artery, InternalSensitivity and SpecificityImage Processing, Computer-AssistedAneurysm, RupturedSalivary Gland CalculiSubarachnoid HemorrhageArterial Occlusive DiseasesCentral Nervous System Vascular MalformationsCarotid StenosisRadiography, Dental, DigitalUltrasonography, Doppler, DuplexCerebral VeinsReproducibility of ResultsConstriction, PathologicTomography, Spiral ComputedUltrasonography, Doppler, ColorObserver VariationIohexolArteriovenous MalformationsX-Ray Intensifying ScreensSurgical InstrumentsCerebral ArteriesVertebrobasilar InsufficiencyVasospasm, IntracranialCarotid Artery DiseasesArtifactsIopamidolRadiographic Image Interpretation, Computer-AssistedAneurysmSialographyArteriovenous FistulaAnterior Cerebral ArteryCarotid-Cavernous Sinus FistulaPredictive Value of TestsTibial ArteriesGadolinium DTPAMagnetic Resonance ImagingMyelographyVertebral ArteryCerebrovascular DisordersCoronary AngiographyRetrospective StudiesSalivary Gland DiseasesTreatment OutcomeUltrasonography, Doppler, TranscranialCerebral RevascularizationCerebrovascular CirculationRadiography, BitewingCranial SinusesProspective StudiesTriiodobenzoic AcidsIothalamate MeglumineInjections, Intra-ArterialRenal ArteryAngioplasty, BalloonBasilar ArteryRadiography, InterventionalImage EnhancementFollow-Up StudiesSialadenitisNeurosurgical ProceduresImmediate Dental Implant LoadingCarotid ArteriesCerebrospinal Fluid RhinorrheaBlood Flow VelocityVascular PatencyStentsIntracranial ArteriosclerosisCarotid Artery, ExternalFeasibility StudiesPhantoms, ImagingIschemic Attack, TransientAneurysm, FalseCollateral CirculationTime FactorsCircle of WillisUltrasonographyIschemiaMoyamoya DiseaseAortographyPopliteal ArteryRadiation DosageRadiography, Dual-Energy Scanned ProjectionRadionuclide ImagingVascular Surgical ProceduresLibraries, DigitalIliac ArteryFemoral Artery