Tomography, X-Ray ComputedAngiographyCoronary AngiographyMagnetic Resonance AngiographyCerebral AngiographyAngiography, Digital SubtractionImage Processing, Computer-AssistedFluorescein AngiographyImage Interpretation, Computer-AssistedImaging, Three-DimensionalContrast MediaRadiographic Image EnhancementSensitivity and SpecificityRadiographic Image Interpretation, Computer-AssistedIntracranial AneurysmRadionuclide AngiographyReproducibility of ResultsTomography, Spiral ComputedCoronary Artery DiseaseCoronary StenosisEmbolization, TherapeuticPredictive Value of TestsObserver VariationIntracranial Arteriovenous MalformationsIopamidolMultidetector Computed TomographyAlgorithmsSubtraction TechniqueCarotid Artery, InternalProspective StudiesIohexolCoronary VesselsRetrospective StudiesVertebral ArteryCoronary DiseaseTreatment OutcomeStentsArterial Occlusive DiseasesSubarachnoid HemorrhageAneurysm, RupturedFeasibility StudiesGadolinium DTPAConstriction, PathologicFollow-Up StudiesCentral Nervous System Vascular MalformationsIndocyanine GreenCarotid StenosisVertebrobasilar InsufficiencyFundus OculiUltrasonography, InterventionalTime FactorsArteriovenous FistulaDiagnostic ImagingCerebral VeinsMyocardial InfarctionCerebral ArteriesAngioplasty, Balloon, CoronarySeverity of Illness IndexCircle of WillisCarotid Artery DiseasesElectrocardiographyCardiac-Gated Imaging TechniquesTriiodobenzoic AcidsEquipment DesignArteriovenous MalformationsCollateral CirculationMyocardial Perfusion ImagingAortographyRadiography, InterventionalBlood Flow VelocityAngina PectorisCardiac CatheterizationPattern Recognition, AutomatedMagnetic Resonance ImagingUltrasonography, Doppler, DuplexCarotid ArteriesRadiation DosageCoronary CirculationImage EnhancementVascular PatencyTechnetiumChest PainGadoliniumCineangiographyBasilar ArteryTomography, Emission-Computed, Single-PhotonAngiocardiographyBrainTomography, Optical CoherenceUltrasonographyCerebral Arterial DiseasesFractional Flow Reserve, MyocardialRisk FactorsPulmonary EmbolismMyocardial RevascularizationCerebrovascular DisordersRenal ArteryAneurysmCoronary Vessel AnomaliesX-Ray Intensifying Screens