Tomography, OpticalTomography, X-Ray ComputedTomographyTomography, Optical CoherenceDoppler EffectPhantoms, ImagingEquipment DesignOptical ProcessesEquipment Failure AnalysisPhotoacoustic TechniquesPositron-Emission TomographyImaging, Three-DimensionalTomography, Emission-ComputedImage Processing, Computer-AssistedReproducibility of ResultsTomography, Spiral ComputedImage EnhancementAlgorithmsMultidetector Computed TomographySensitivity and SpecificityTomography, Emission-Computed, Single-PhotonCone-Beam Computed TomographyElectron Microscope TomographyTomography, X-RayFluorodeoxyglucose F18Tomography Scanners, X-Ray ComputedRadiographyGamma RaysMagnetic Resonance ImagingRadiation DosageRadiographic Image Interpretation, Computer-AssistedPredictive Value of TestsX-Ray MicrotomographyElectron Probe MicroanalysisFluorine RadioisotopesMultimodal ImagingRetrospective StudiesProspective StudiesTime FactorsPneumoconiosisElasmobranchiiDiagnostic ImagingRadiographic Image EnhancementSkates (Fish)Four-Dimensional Computed TomographyBrainComputer SimulationObserver VariationContrast MediaTreatment OutcomeRadiography, AbdominalRadiometryRadiology Department, HospitalFollow-Up StudiesFast NeutronsRadiography, ThoracicCalcinosisRadiotherapy Planning, Computer-AssistedLungMacula LuteaDose-Response Relationship, RadiationModels, BiologicalCoronary AngiographyCarbon RadioisotopesArtifactsWrist JointCraniocerebral TraumaSeverity of Illness IndexOxygen RadioisotopesDiagnostic Techniques, OphthalmologicalLung NeoplasmsSpectrometry, X-Ray EmissionCoronary Artery DiseaseModels, TheoreticalDiagnostic ErrorsCerebrovascular CirculationTeleradiologyPleuraUltraviolet RaysRadiation EffectsFeasibility StudiesBronchographyAnatomy, Cross-SectionalMetacarpophalangeal JointAsbestosisNerve FibersPrognosisForeign BodiesOptic DiskAluminum SilicatesAnimal FinsMetacarpusEmergency Service, HospitalSoftwareX ChromosomeCathode Ray TubeIncidental FindingsOptical PhenomenaCryoelectron MicroscopyBone and Bones