Multidetector Computed TomographyTomography, X-Ray ComputedTomography, Spiral ComputedTomographyRadiographic Image Interpretation, Computer-AssistedPositron-Emission TomographyTomography, Optical CoherenceImaging, Three-DimensionalTriiodobenzoic AcidsTomography Scanners, X-Ray ComputedRadiographic Image EnhancementCone-Beam Computed TomographyTomography, Emission-ComputedIopamidolContrast MediaSensitivity and SpecificityCoronary AngiographyRadiation DosageTomography, Emission-Computed, Single-PhotonCardiac-Gated Imaging TechniquesReproducibility of ResultsBronchographyTomography, OpticalAngiographyCalcinosisPredictive Value of TestsImage Processing, Computer-AssistedIohexolElectron Microscope TomographyRadiography, AbdominalCoronary Artery DiseaseObserver VariationIncidental FindingsCoronary StenosisVascular MalformationsRetrospective StudiesTomography, X-RayArtifactsPhantoms, ImagingPhlebographyFluorodeoxyglucose F18Prospective StudiesMagnetic Resonance ImagingTemporal BonePlaque, AtheroscleroticAzygos VeinPreoperative CareSeverity of Illness IndexCholangiopancreatography, Magnetic ResonanceFeasibility StudiesCoronary Vessel AnomaliesRadiography, ThoracicImage EnhancementCoronary VesselsBody BurdenCerebral AngiographyUrographyDiagnostic ImagingAlgorithmsTreatment OutcomeAortic ValveAortographyRadiation ProtectionBronchial ArteriesIntestinal VolvulusPulmonary VeinsMercury RadioisotopesExtravasation of Diagnostic and Therapeutic MaterialsPetrous BonePerfusion ImagingElectrocardiographyDouble-Balloon EnteroscopySpondylolysisSolitary Pulmonary NoduleVascular CalcificationRadiometryPericardiumRenal VeinsWounds, NonpenetratingScimitar SyndromeAortic Valve StenosisNeoplasms, Connective and Soft TissuePulmonary EmbolismFollow-Up StudiesEquipment DesignTime FactorsHeart Valve ProsthesisMyocardial Perfusion ImagingChest PainX-Ray MicrotomographyUltrasonography, InterventionalFocal InfectionSwine, MiniatureRare DiseasesIntra-Abdominal FatMultimodal ImagingFluorine RadioisotopesChi-Square DistributionRadiography, InterventionalMagnetic Resonance Angiography