Tomography, X-Ray ComputedTomographyPositron-Emission TomographyTomography, Optical CoherenceTomography, Emission-ComputedTomography, Spiral ComputedTomography, OpticalMultidetector Computed TomographyTomography, Emission-Computed, Single-PhotonCone-Beam Computed TomographyElectron Microscope TomographyTomography, X-RayFluorodeoxyglucose F18Tomography Scanners, X-Ray ComputedImaging, Three-DimensionalSensitivity and SpecificityImage Processing, Computer-AssistedX-Ray MicrotomographyReproducibility of ResultsMagnetic Resonance ImagingMultimodal ImagingFluorine RadioisotopesRadiographic Image Interpretation, Computer-AssistedPhantoms, ImagingPredictive Value of TestsDiagnostic ImagingFour-Dimensional Computed TomographyRetrospective StudiesContrast MediaRadiography, AbdominalBrainCalcinosisRadiographic Image EnhancementTreatment OutcomeRadiography, ThoracicProspective StudiesMacula LuteaCoronary AngiographyOxygen RadioisotopesDiagnostic Techniques, OphthalmologicalCarbon RadioisotopesAlgorithmsObserver VariationCoronary Artery DiseaseImage EnhancementCerebrovascular CirculationBronchographyAnatomy, Cross-SectionalRadiation DosageFollow-Up StudiesNerve FibersEquipment DesignOptic DiskTime FactorsArtifactsIncidental FindingsOptical PhenomenaAngiographySolitary Pulmonary NoduleLung NeoplasmsOrganotechnetium CompoundsThallium RadioisotopesVisual AcuityFeasibility StudiesFluorescein AngiographyAortographyOptic Nerve DiseasesCryoelectron MicroscopyCoronary StenosisSeverity of Illness IndexMyocardial Perfusion ImagingUltrasonographyCoronary VesselsPrognosisMacular EdemaRetinal Ganglion CellsPreoperative CareTechnetium Tc 99m SestamibiRetinaInterferometryEquipment Failure AnalysisNeoplasm StagingCopper RadioisotopesRetinal DiseasesNitrogen RadioisotopesRadioactive TracersROC CurveOphthalmoscopyGallium RadioisotopesIopamidolRacloprideHematomaMediastinumLungGlaucomaSubtraction TechniqueSkullCardiac-Gated Imaging TechniquesOptical ProcessesHeart