Tomography, X-Ray ComputedPositron-Emission TomographyMultimodal ImagingRadiographic Image Interpretation, Computer-AssistedFluorodeoxyglucose F18Radiographic Image EnhancementRadiopharmaceuticalsTomography, Spiral ComputedSensitivity and SpecificitySubtraction TechniqueRadiation DosageCone-Beam Computed TomographyReproducibility of ResultsContrast MediaRadiography, AbdominalIohexolPhantoms, ImagingImaging, Three-DimensionalWhole Body ImagingTomography Scanners, X-Ray ComputedMultidetector Computed TomographyImage Processing, Computer-AssistedRadiography, ThoracicMagnetic Resonance ImagingRetrospective StudiesArtifactsSystematized Nomenclature of MedicineColonography, Computed TomographicObserver VariationCholera ToxinPerfusion ImagingCerebral AngiographyTomography, Emission-Computed, Single-PhotonSolitary Pulmonary NoduleAngiographyImage EnhancementRadiometryPredictive Value of TestsTemporal BoneImage Interpretation, Computer-AssistedIopamidolTreatment OutcomeRadiotherapy Planning, Computer-AssistedAlgorithmsTomography, Emission-ComputedRadiation ProtectionProspective StudiesParanasal SinusesRadiography, Dual-Energy Scanned ProjectionFour-Dimensional Computed TomographyCalcitoninIncidental FindingsNeoplasm StagingFeasibility StudiesRadiography, InterventionalDiagnostic ImagingAngiography, Digital SubtractionFollow-Up StudiesTime FactorsGallium RadioisotopesNeuroradiographyLiver NeoplasmsCalcinosisCardiac-Gated Imaging TechniquesWhole-Body CountingBody BurdenPreoperative CareSurgery, Computer-AssistedCerebral HemorrhageThoracic NeoplasmsSignal-To-Noise RatioMyelographyPrognosisChorda Tympani NerveFluorine RadioisotopesCerebral InfarctionThermoluminescent DosimetryPelvisFalse Positive ReactionsAcute DiseasePulmonary EmphysemaX-Ray Intensifying ScreensPortographyRadiologyDiatrizoate MeglumineBrainXenonRadiotherapy, Image-GuidedNeckSkull FracturesCerebral VentriculographyTriiodobenzoic AcidsCraniocerebral TraumaROC CurveAbdominal NeoplasmsSubarachnoid HemorrhageExtravasation of Diagnostic and Therapeutic MaterialsLymphatic MetastasisWounds, NonpenetratingNuclear Medicine