Colonography, Computed TomographicColonic PolypsColorectal NeoplasmsColonoscopyDiatrizoate MeglumineEnemaLaxativesCatharticsSensitivity and SpecificityRadiographic Image Interpretation, Computer-AssistedTomography, X-Ray ComputedBarium SulfateInsufflationRadiographic Image EnhancementIothalamate MeglumineContrast MediaAdenomaMass ScreeningColonReproducibility of ResultsImaging, Three-DimensionalTomography Scanners, X-Ray ComputedColonic DiseasesEarly Detection of CancerColonic NeoplasmsAdenomatous PolypsSigmoidoscopyTomographyFalse Positive ReactionsImage Processing, Computer-AssistedColorectal SurgeryColorectal Neoplasms, Hereditary NonpolyposisProspective StudiesRadiologyPattern Recognition, AutomatedPolypsAlgorithmsTomography, OpticalPredictive Value of TestsRectal NeoplasmsIohexolProne PositionIncidental FindingsFeasibility StudiesAdenocarcinomaOccult BloodDiagnosis, Computer-AssistedCost-Benefit AnalysisLimit of DetectionRectumPolymerase Chain ReactionRetrospective StudiesPatient PreferenceWisconsinObserver VariationMagnetic Resonance ImagingFalse Negative ReactionsTomography, Emission-ComputedFecesCone-Beam Computed TomographyROC CurveLiver NeoplasmsAutomationPrognosisInfarctionTumor Markers, BiologicalNeoplasm StagingPositron-Emission Tomography