UltrasonographyUltrasonography, Doppler, ColorUltrasonography, DopplerUltrasonography, PrenatalUltrasonography, MammarySensitivity and SpecificityUltrasonography, Doppler, TranscranialEndosonographySulfur HexafluorideUltrasonography, Doppler, PulsedContrast MediaUltrasonography, InterventionalEchoencephalographyUltrasonography, Doppler, DuplexPregnancyReproducibility of ResultsBlood Flow VelocityProspective StudiesImaging, Three-DimensionalFetal DiseasesTomography, X-Ray ComputedVaginaImage EnhancementPredictive Value of TestsPolypsOvarian CystsAbdomenUterine HemorrhageCystsRetrospective StudiesUterine DiseasesScrotumPregnancy Trimester, SecondFallopian Tube Patency TestsGestational AgeUrographyHysteroscopyHysterosalpingographyPalpationObserver VariationMagnetic Resonance ImagingHydronephrosisTransducersNeckAbdominal InjuriesUterusPregnancy Trimester, FirstAdnexal DiseasesWounds, NonpenetratingOvarian DiseasesLeiomyomaGallbladderGallbladder DiseasesPelvisCarotid Artery DiseasesPreoperative CareLiver NeoplasmsTorsion AbnormalityCarotid ArteriesAngiographyThyroid NoduleMicrobubblesPrenatal DiagnosisBiopsy, NeedleUterine NeoplasmsSplenic DiseasesTesticular DiseasesFetal HeartDermoid CystPregnancy Trimester, ThirdPregnancy, EctopicHemangiomaAngiography, Digital SubtractionSpermatoceleCarotid StenosisPulsatile FlowInfant, NewbornFollow-Up StudiesPortal VeinImage Interpretation, Computer-AssistedCerebral ArteriesFalse Negative ReactionsBreast DiseasesCarotid Artery, InternalMetacarpophalangeal JointPerineumFalse Positive ReactionsPolysaccharidesPoint-of-Care SystemsCerebrovascular CirculationRegional Blood FlowFallopian Tube DiseasesAdnexa UteriRectumEndometriosisAppendicitisDiagnostic ImagingFeasibility StudiesTreatment OutcomeReference Values