UltrasonographyUltrasonography, Doppler, ColorUltrasonography, DopplerUltrasonography, PrenatalEndosonographyUltrasonography, Doppler, DuplexUltrasonography, Doppler, PulsedUltrasonography, MammaryUltrasonography, InterventionalUltrasonography, Doppler, TranscranialSensitivity and SpecificitySulfur HexafluorideTomography, X-Ray ComputedProspective StudiesContrast MediaPregnancyUrographyPredictive Value of TestsReproducibility of ResultsBlood Flow VelocityFetal DiseasesScrotumImaging, Three-DimensionalRetrospective StudiesCystsPalpationCarotid Artery DiseasesAbdomenPreoperative CareMagnetic Resonance ImagingToe JointThyroid NoduleCarotid ArteriesOvarian CystsGallbladderEchoencephalographyMetacarpophalangeal JointGestational AgeVaginaLiver NeoplasmsHydronephrosisObserver VariationAbdominal InjuriesImage EnhancementSplenic DiseasesTesticular DiseasesDiagnostic ImagingAuscultationFollow-Up StudiesGallbladder DiseasesTreatment OutcomeAngiographyCarotid Artery, CommonTransducersBiliary Tract DiseasesRectumInfant, NewbornBiopsy, NeedleFalse Positive ReactionsBiopsy, Fine-NeedleOvarian FollicleTunica MediaPrenatal DiagnosisTendinopathyCholecystographyPortal VeinTesticular HydroceleGallbladder NeoplasmsCholangiopancreatography, Endoscopic RetrogradePolypsUrinary TractRenal ColicPulsatile FlowIntraoperative CareCarotid StenosisUterusPregnancy Trimester, SecondRisk FactorsCholangiopancreatography, Magnetic ResonanceSynovitisLymphangioma, CysticPhysical ExaminationCholelithiasisTunica IntimaHysteroscopyPelvisWounds, NonpenetratingPancreatic NeoplasmsUrologic DiseasesVenous ThrombosisAbdominal PainDilatation, PathologicPortographyOvaryLaparoscopyEchinococcosis, HepaticFalse Negative ReactionsLaparotomyDiagnostic Techniques, UrologicalNeck