Catheters, IndwellingCathetersCatheterizationBrain ChemistryCatheterization, Central VenousBrain InjuriesBrain NeoplasmsCerebral AngiographyCentral Venous CathetersAngiographyCoronary AngiographyBrain MappingFluorescein AngiographyCardiac CathetersCatheterization, PeripheralUrinary CatheterizationAngiography, Digital SubtractionMagnetic Resonance AngiographyBrainUrinary CathetersEquipment FailureEquipment DesignBrain IschemiaMagnetic Resonance ImagingIntracranial AneurysmCatheter-Related InfectionsTreatment OutcomeBrain EdemaTime FactorsImaging, Three-DimensionalImage Processing, Computer-AssistedBrain StemTomography, X-Ray ComputedCardiac CatheterizationFollow-Up StudiesRetrospective StudiesMicrovascular AnginaEmbolization, TherapeuticFluoroscopyCarotid Artery, InternalCircle of WillisCineangiographyProspective StudiesCoronary VesselsBrain AbscessIntracranial Arteriovenous MalformationsSensitivity and SpecificityForeign-Body MigrationStentsReproducibility of ResultsContrast MediaCoronary DiseaseCatheterization, Swan-GanzChest PainElectrocardiographyCerebral VeinsRadiography, InterventionalBlood Flow VelocityAneurysm, RupturedJugular VeinsCerebrovascular CirculationIndocyanine GreenFundus OculiArterial Occlusive DiseasesFeasibility StudiesRecurrenceConstriction, PathologicSubclavian VeinCarotid StenosisNeuronsVertebral ArteryAngina PectorisAngioplasty, BalloonObserver VariationBlood-Brain BarrierHypoxia, BrainSubarachnoid HemorrhageUltrasonography, InterventionalCerebral ArteriesCerebral CortexIschemic Attack, TransientCollateral CirculationRadiographic Image Interpretation, Computer-AssistedRats, Sprague-DawleyRetinal VesselsCarotid Artery DiseasesSilicone ElastomersAtrial FibrillationFemoral ArteryPulmonary VeinsDisease Models, AnimalPeritoneal DialysisVascular Access DevicesAngioplasty, Balloon, CoronaryCarotid ArteriesPeritonitisVision, EntopticBasilar ArteryCoronary Artery DiseaseRadiographic Image Enhancement