Catheters, IndwellingAngiographyCathetersCoronary AngiographyMagnetic Resonance AngiographyCerebral AngiographyAngiography, Digital SubtractionCatheterizationFluorescein AngiographyCatheterization, Central VenousTomography, X-Ray ComputedCatheterization, PeripheralCentral Venous CathetersContrast MediaCardiac CathetersIntracranial AneurysmUrinary CatheterizationRadionuclide AngiographySensitivity and SpecificityTreatment OutcomeCoronary Artery DiseaseProspective StudiesImaging, Three-DimensionalEquipment FailureEquipment DesignCoronary StenosisUrinary CathetersEmbolization, TherapeuticTomography, Spiral ComputedCardiac CatheterizationRetrospective StudiesTime FactorsPredictive Value of TestsCatheter-Related InfectionsFollow-Up StudiesIntracranial Arteriovenous MalformationsCoronary VesselsIopamidolStentsUltrasonography, InterventionalCarotid Artery, InternalReproducibility of ResultsFeasibility StudiesElectrocardiographyMultidetector Computed TomographyCoronary DiseaseRadiography, InterventionalConstriction, PathologicVertebral ArteryArterial Occlusive DiseasesFluoroscopyImage Processing, Computer-AssistedIohexolSubarachnoid HemorrhageRadiographic Image Interpretation, Computer-AssistedForeign-Body MigrationAneurysm, RupturedAngioplasty, Balloon, CoronaryPulmonary VeinsIndocyanine GreenArteriovenous FistulaObserver VariationJugular VeinsCarotid StenosisVertebrobasilar InsufficiencyCentral Nervous System Vascular MalformationsAngina PectorisMyocardial InfarctionRecurrenceRadiographic Image EnhancementCatheterization, Swan-GanzCerebral VeinsCerebral ArteriesMagnetic Resonance ImagingRisk FactorsExtravasation of Diagnostic and Therapeutic MaterialsSeverity of Illness IndexBlood Flow VelocityAortographyVascular Access DevicesVascular PatencyAtrial FibrillationCarotid ArteriesCollateral CirculationCircle of WillisCarotid Artery DiseasesFundus OculiArteriovenous MalformationsRadiation DosageRadial ArteryTriiodobenzoic AcidsSubclavian VeinCoronary CirculationCineangiographyUltrasonography, Doppler, DuplexImage EnhancementAngioplasty, BalloonGadolinium DTPAPulmonary EmbolismFemoral Artery