Angiography, Digital SubtractionAngiographyWounds, PenetratingEmbolization, TherapeuticCoronary AngiographySubtraction TechniqueMagnetic Resonance AngiographyCerebral AngiographyIntracranial AneurysmRadiographic Image EnhancementContrast MediaImaging, Three-DimensionalSensitivity and SpecificityIntracranial Arteriovenous MalformationsTomography, X-Ray ComputedCarotid Artery, InternalImage Processing, Computer-AssistedAneurysm, RupturedCentral Nervous System Vascular MalformationsReproducibility of ResultsArterial Occlusive DiseasesCarotid StenosisTomography, Spiral ComputedSubarachnoid HemorrhageCerebral VeinsIohexolSalivary Gland CalculiObserver VariationFluorescein AngiographyIopamidolUltrasonography, Doppler, DuplexRadiographic Image Interpretation, Computer-AssistedPredictive Value of TestsUltrasonography, Doppler, ColorConstriction, PathologicRadiography, Dental, DigitalArteriovenous MalformationsCerebral ArteriesArtifactsX-Ray Intensifying ScreensVertebrobasilar InsufficiencyGadolinium DTPAMagnetic Resonance ImagingRetrospective StudiesCarotid Artery DiseasesProspective StudiesAnterior Cerebral ArteryTriiodobenzoic AcidsVertebral ArteryCarotid-Cavernous Sinus FistulaImage EnhancementSurgical InstrumentsTibial ArteriesCerebrovascular DisordersCranial SinusesRadiography, InterventionalTreatment OutcomeVasospasm, IntracranialUltrasonography, Doppler, TranscranialBasilar ArteryInjections, Intra-ArterialArteriovenous FistulaAneurysmSialographyMyelographyCerebrovascular CirculationRadiation DosageCircle of WillisFeasibility StudiesFollow-Up StudiesRenal ArteryIothalamate MeglumineCarotid ArteriesCerebral RevascularizationNeurosurgical ProceduresSalivary Gland DiseasesIntracranial ArteriosclerosisUltrasonographyBlood Flow VelocityRadiography, BitewingCarotid Artery, ExternalTime FactorsMoyamoya DiseasePhantoms, ImagingRadionuclide AngiographyDiagnostic ImagingVascular PatencyStentsROC CurveAortographyCollateral CirculationGadoliniumSeverity of Illness IndexAngioplasty, BalloonUltrasonography, DopplerSialadenitisIschemic Attack, TransientFalse Negative ReactionsImmediate Dental Implant LoadingFalse Positive Reactions