Tomography Scanners, X-Ray ComputedTomography, X-Ray ComputedTomographyPositron-Emission TomographyTomography, Optical CoherenceTomography, Emission-ComputedTomography, Spiral ComputedTomography, OpticalMultidetector Computed TomographyGamma RaysCone-Beam Computed TomographyTomography, Emission-Computed, Single-PhotonPhantoms, ImagingElectron Microscope TomographyImaging, Three-DimensionalTechnologyReproducibility of ResultsMagnetic Resonance ImagingTomography, X-RayImage Processing, Computer-AssistedSensitivity and SpecificityFluorodeoxyglucose F18RadiographyEquipment DesignRadiation DosageElasmobranchiiSkates (Fish)Radiographic Image Interpretation, Computer-AssistedEquipment Failure AnalysisBiomedical TechnologyImage EnhancementAlgorithmsRadiographic Image EnhancementBrainArtifactsFluorine RadioisotopesContrast MediaDiagnostic ImagingPredictive Value of TestsX-Ray MicrotomographyRadiometryTime FactorsElectron Probe MicroanalysisObserver VariationProspective StudiesRetrospective StudiesTechnology Assessment, BiomedicalAnimal FinsPneumoconiosisMultimodal ImagingCathode Ray TubeGermaniumUltrasonographyTechnology TransferFour-Dimensional Computed TomographyFeasibility StudiesUltraviolet RaysRadiology Department, HospitalRadiography, AbdominalTreatment OutcomeWhole Body ImagingSubtraction TechniqueCosmic RadiationFast NeutronsImage Interpretation, Computer-AssistedRadiography, ThoracicTransducersTeleradiologyFollow-Up StudiesLutetiumCalcinosisTechnology, RadiologicOxygen RadioisotopesCoronary AngiographyX-RaysLungAnatomy, Cross-SectionalDose-Response Relationship, RadiationSeverity of Illness IndexCarbon RadioisotopesOptics and PhotonicsWrist JointLung NeoplasmsCoronary Artery DiseaseCerebrovascular CirculationCraniocerebral TraumaRadiation EffectsMacula LuteaCalibrationBronchographyDiagnostic Techniques, OphthalmologicalSoftwareSpectrometry, X-Ray EmissionMiniaturizationDiagnostic ErrorsGamma CamerasAngiographyMedical Laboratory ScienceBone and BonesComputer-Aided Design