UltrasonographyUltrasonography, Doppler, ColorUltrasonography, DopplerUltrasonography, PrenatalUltrasonography, Doppler, DuplexEndosonographyUltrasonography, Doppler, PulsedUltrasonography, MammaryCarotid Artery, InternalUltrasonography, InterventionalSensitivity and SpecificityUltrasonography, Doppler, TranscranialTomography, X-Ray ComputedReproducibility of ResultsInternal MedicineSulfur HexafluorideProspective StudiesPregnancyContrast MediaBlood Flow VelocityPredictive Value of TestsImaging, Three-DimensionalRetrospective StudiesUrographyFetal DiseasesScrotumCystsMagnetic Resonance ImagingCarotid ArteriesPalpationCarotid Artery DiseasesTreatment OutcomePreoperative CareAbdomenCarotid StenosisFollow-Up StudiesEchoencephalographyThyroid NoduleOvarian CystsObserver VariationToe JointMammary ArteriesGestational AgeAngiographyGallbladderVaginaLiver NeoplasmsTime FactorsImage EnhancementMetacarpophalangeal JointFracture Fixation, InternalInternal CapsuleCarotid Artery, CommonAbdominal InjuriesAuscultationHydronephrosisDiagnostic ImagingSplenic DiseasesTesticular DiseasesRectumTunica MediaInfant, NewbornTransducersJugular VeinsGallbladder DiseasesRisk FactorsBiliary Tract DiseasesFalse Positive ReactionsBiopsy, NeedleOvarian FollicleTunica IntimaBiopsy, Fine-NeedlePrenatal DiagnosisIntraoperative CarePelvisMolecular Sequence DataPortal VeinPulsatile FlowTendinopathyAnal CanalCholecystographyCarotid Artery, ExternalCholangiopancreatography, Endoscopic RetrogradeTesticular HydroceleDNA, Ribosomal SpacerPhysical ExaminationGallbladder NeoplasmsPolypsUterusArterial Occlusive DiseasesPregnancy Trimester, SecondWounds, NonpenetratingUrinary TractRenal ColicDilatation, PathologicNeckRegional Blood FlowAngiography, Digital SubtractionCholangiopancreatography, Magnetic ResonanceVenous Thrombosis