UltrasonographyUltrasonography, Doppler, ColorUltrasonography, DopplerUltrasonography, PrenatalSensitivity and SpecificityEndosonographyUltrasonography, Doppler, DuplexPrenatal DiagnosisUltrasonography, MammaryUltrasonography, Doppler, PulsedTomography, X-Ray ComputedDelayed DiagnosisUltrasonography, InterventionalEarly DiagnosisRetrospective StudiesProspective StudiesPregnancyUltrasonography, Doppler, TranscranialPredictive Value of TestsReproducibility of ResultsFetal DiseasesSulfur HexafluorideContrast MediaDiagnosisMagnetic Resonance ImagingDiagnostic ErrorsBiopsyFollow-Up StudiesTreatment OutcomeInfant, NewbornUrographyCystsRisk FactorsBiopsy, NeedleImaging, Three-DimensionalTime FactorsScrotumBlood Flow VelocityFalse Positive ReactionsObserver VariationPalpationPrognosisDiagnostic ImagingBiopsy, Fine-NeedleDiagnosis, Computer-AssistedGestational AgeLiver NeoplasmsAbdomenFalse Negative ReactionsPreoperative CareThyroid NodulePhysical ExaminationOvarian CystsCarotid Artery DiseasesROC CurveImage EnhancementNursing DiagnosisFatal OutcomeVaginaSeverity of Illness IndexGallbladderHydronephrosisSplenic DiseasesEchoencephalographyAngiographyAbdominal InjuriesAcute DiseaseCarotid ArteriesIncidencePrevalenceCohort StudiesMetacarpophalangeal JointToe JointGallbladder DiseasesTesticular DiseasesPancreatic NeoplasmsRectumAuscultationPreimplantation DiagnosisAge FactorsCase-Control StudiesEvaluation Studies as TopicNeoplasm StagingAppendicitisCholangiopancreatography, Endoscopic RetrogradeBiliary Tract DiseasesPolypsPregnancy Trimester, SecondGallbladder NeoplasmsAbdomen, AcuteRadiography, AbdominalBiological MarkersAbscessWounds, NonpenetratingCholangiopancreatography, Magnetic ResonanceLaparotomyEndoscopyNeckHemangiomaCholecystography