UltrasonographyUltrasonicsUltrasonic TherapyHigh-Intensity Focused Ultrasound AblationUltrasonography, InterventionalMicrobubblesUltrasonography, PrenatalTransducersUltrasonography, DopplerUltrasonography, Doppler, ColorSensitivity and SpecificityPregnancyMicroscopy, AcousticImaging, Three-DimensionalContrast MediaEndosonographyReproducibility of ResultsEchoencephalographySonicationProspective StudiesFetal DiseasesUltrasonography, MammaryGestational AgePhantoms, ImagingElasticity Imaging TechniquesAcousticsPregnancy Trimester, SecondFluorocarbonsUltrasonography, Doppler, DuplexSulfur HexafluorideCalcaneusPredictive Value of TestsUltrasonography, Doppler, PulsedImage Interpretation, Computer-AssistedPhonophoresisBlood Flow VelocityEquipment DesignObserver VariationUltrasound, High-Intensity Focused, TransrectalTime FactorsHigh-Energy Shock WavesTomography, X-Ray ComputedImage EnhancementPregnancy Trimester, FirstMagnetic Resonance ImagingMolecular Sequence DataRetrospective StudiesTreatment OutcomeFeasibility StudiesCoronary VesselsPalpationImage Processing, Computer-AssistedInfant, NewbornCarotid ArteriesBase SequenceFollow-Up StudiesPregnancy Trimester, ThirdPrenatal DiagnosisAdnexal DiseasesUltrasonography, Doppler, TranscranialFetal HeartMagnetic Resonance Imaging, InterventionalCrown-Rump LengthStentsAlgorithmsTunica IntimaBiopsy, NeedleCoronary Artery DiseaseCarotid Artery DiseasesCoronary AngiographyEquipment Failure AnalysisSoundRegional Blood FlowPoint-of-Care SystemsAbdomenAmino Acid SequencePlaque, AtheroscleroticCarotid StenosisPerineumDiagnostic ImagingUterine HemorrhageDoppler EffectFemoral ArteryRisk FactorsThermographyFetusSurgery, Computer-AssistedEchocardiographyNeedlesCystsHeadBrachial ArteryPregnancy OutcomePelvic FloorReference ValuesSwineEchocardiography, Four-DimensionalLeiomyomaSignal Processing, Computer-AssistedNerve Block