UltrasonographyImage Processing, Computer-AssistedUltrasonography, Doppler, ColorUltrasonography, DopplerUltrasonography, PrenatalImage Interpretation, Computer-AssistedEndosonographySensitivity and SpecificityUltrasonography, Doppler, DuplexImaging, Three-DimensionalUltrasonography, MammaryRadiographic Image EnhancementUltrasonography, Doppler, PulsedTomography, X-Ray ComputedReproducibility of ResultsUltrasonography, InterventionalContrast MediaUltrasonography, Doppler, TranscranialRadiographic Image Interpretation, Computer-AssistedAlgorithmsSulfur HexafluorideProspective StudiesDiagnostic ImagingObserver VariationPregnancyPredictive Value of TestsUrographyBlood Flow VelocityRetrospective StudiesSubtraction TechniqueFetal DiseasesCystsScrotumPattern Recognition, AutomatedTransducersCarotid Artery DiseasesPreoperative CareAbdomenPalpationCarotid ArteriesEchoencephalographyLiver NeoplasmsGestational AgeMetacarpophalangeal JointTime FactorsThyroid NoduleMagnetic Resonance ImagingGallbladderToe JointOvarian CystsVaginaFollow-Up StudiesFalse Positive ReactionsTreatment OutcomeHydronephrosisFeasibility StudiesSplenic DiseasesAbdominal InjuriesImage EnhancementAnatomy, Cross-SectionalBrainAuscultationTesticular DiseasesInfant, NewbornRadiography, AbdominalROC CurveBiopsy, NeedleRectumGallbladder DiseasesCarotid Artery, CommonReference ValuesMagnetic Resonance AngiographyBiliary Tract DiseasesAngiographyTomography, Spiral ComputedBiopsy, Fine-NeedlePortal VeinTunica MediaPrenatal DiagnosisOvarian FollicleTendinopathyCarotid StenosisEquipment DesignRadionuclide ImagingIntraoperative CareData CompressionPulsatile FlowMammographyCone-Beam Computed TomographyFalse Negative ReactionsRisk FactorsNeckCholecystographyPolypsSoftwareSynovitisPregnancy Trimester, SecondCholangiopancreatography, Endoscopic RetrogradeCholangiopancreatography, Magnetic ResonanceGallbladder Neoplasms