Tomography, X-Ray ComputedUltrasonographyTomographyUltrasonography, Doppler, ColorPositron-Emission TomographyTomography, Optical CoherenceUltrasonography, DopplerTomography, Emission-ComputedTomography, Spiral ComputedUltrasonography, PrenatalTomography, OpticalMultidetector Computed TomographySensitivity and SpecificityTomography, Emission-Computed, Single-PhotonEndosonographyElectron Microscope TomographyCone-Beam Computed TomographyUltrasonography, Doppler, DuplexImaging, Three-DimensionalReproducibility of ResultsUltrasonography, InterventionalUltrasonography, MammaryCarotid Artery, InternalUltrasonography, Doppler, PulsedTomography, X-RayProspective StudiesContrast MediaUltrasonography, Doppler, TranscranialFluorodeoxyglucose F18Predictive Value of TestsMagnetic Resonance ImagingTomography Scanners, X-Ray ComputedRetrospective StudiesImage Processing, Computer-AssistedSulfur HexafluorideTreatment OutcomeInternal MedicineDiagnostic ImagingPregnancyObserver VariationBlood Flow VelocityFollow-Up StudiesImage EnhancementTime FactorsAngiographyUrographyPreoperative CareCystsRadiography, AbdominalMultimodal ImagingCerebrovascular CirculationPhantoms, ImagingLiver NeoplasmsX-Ray MicrotomographyFetal DiseasesScrotumAbdomenCarotid ArteriesFluorine RadioisotopesCarotid Artery DiseasesAbdominal InjuriesRadiography, ThoracicRadiographic Image Interpretation, Computer-AssistedBrainCalcinosisSeverity of Illness IndexPalpationAlgorithmsCarotid StenosisFalse Positive ReactionsRisk FactorsFeasibility StudiesWounds, NonpenetratingFour-Dimensional Computed TomographyIncidental FindingsSplenic DiseasesPelvisRadiographic Image EnhancementEchoencephalographyReference ValuesROC CurveGallbladderAnatomy, Cross-SectionalTransducersMammary ArteriesBiopsyOvarian CystsGestational AgeThyroid NoduleBiopsy, NeedleRegional Blood FlowVaginaAbdominal PainPortal VeinFracture Fixation, InternalPrognosisToe JointCoronary AngiographyCerebral AngiographyMetacarpophalangeal Joint