Tomography, X-Ray ComputedPositron-Emission TomographyRadiography, AbdominalRadiographic Image Interpretation, Computer-AssistedFluorodeoxyglucose F18RadiopharmaceuticalsRadiographic Image EnhancementRadiography, ThoracicSensitivity and SpecificityReproducibility of ResultsRetrospective StudiesTomography, Spiral ComputedMagnetic Resonance ImagingImaging, Three-DimensionalRadiation DosageObserver VariationWhole Body ImagingImage Processing, Computer-AssistedSubtraction TechniqueParanasal SinusesContrast MediaCone-Beam Computed TomographyIohexolTreatment OutcomePhantoms, ImagingArtifactsPredictive Value of TestsProspective StudiesMultimodal ImagingTomography Scanners, X-Ray ComputedFollow-Up StudiesSolitary Pulmonary NoduleCerebral HemorrhageTemporal BoneTomography, Emission-ComputedBrainMultidetector Computed TomographyHematomaCerebral InfarctionPulmonary EmphysemaImage EnhancementTime FactorsAlgorithmsGallium RadioisotopesTomography, Emission-Computed, Single-PhotonWhole-Body CountingImage Interpretation, Computer-AssistedRadiometryIncidental FindingsRadiotherapy Planning, Computer-AssistedSkull FracturesNeuroradiographyPelvisBrain DiseasesWounds, NonpenetratingMultiple Pulmonary NodulesBronchographyCraniocerebral TraumaAbdominal InjuriesAortic Aneurysm, AbdominalLumbar VertebraeAngiographyAbdominal PainMastoidDiagnostic ErrorsCerebral AngiographyCerebral VentriculographyThoracic VertebraeSurgery, Computer-AssistedPreoperative CareBone ScrewsRadiologyAortographyExtravasation of Diagnostic and Therapeutic MaterialsLung NeoplasmsCerebrovascular DisordersFeasibility StudiesLungTechnetiumCalcinosisGlasgow Coma ScaleFatal OutcomeFluorine RadioisotopesRadiation ProtectionUnnecessary ProceduresCervical VertebraePatient PositioningRadionuclide ImagingSinusitisIopamidolOrbitLiver NeoplasmsSkullPrognosisModels, AnatomicOrbital DiseasesOrganotechnetium CompoundsBlood Vessel Prosthesis ImplantationHematoma, Epidural, CranialSubarachnoid Hemorrhage