AbdomenAbdomen, AcuteUltrasonographyUltrasonicsUltrasonic TherapyHigh-Intensity Focused Ultrasound AblationUltrasonography, InterventionalMicrobubblesUltrasonography, PrenatalRadiography, AbdominalTransducersAbdominal InjuriesUltrasonography, DopplerAbdominal NeoplasmsTomography, X-Ray ComputedUltrasonography, Doppler, ColorSensitivity and SpecificityPregnancyContrast MediaMicroscopy, AcousticImaging, Three-DimensionalEndosonographyReproducibility of ResultsLaparotomyProspective StudiesThoraxEchoencephalographyFetal DiseasesSonicationGestational AgePhantoms, ImagingAbdominal Wound Closure TechniquesAbdominal PainUltrasonography, MammaryPregnancy Trimester, SecondElasticity Imaging TechniquesPredictive Value of TestsTreatment OutcomeAbdominal CavityAcousticsEquipment DesignFluorocarbonsUltrasonography, Doppler, DuplexSulfur HexafluoridePelvisRetrospective StudiesObserver VariationImage Interpretation, Computer-AssistedCalcaneusUltrasonography, Doppler, PulsedAbdominal WallRupture, SpontaneousPhonophoresisBlood Flow VelocityUltrasound, High-Intensity Focused, TransrectalPelvic NeoplasmsTime FactorsImage EnhancementTorsion AbnormalityAppendicitisFeasibility StudiesAbdominal MusclesPalpationIntestinal ObstructionHigh-Energy Shock WavesMagnetic Resonance ImagingCystsInfant, NewbornPregnancy Trimester, FirstWounds, NonpenetratingPneumoperitoneumImage Processing, Computer-AssistedPregnancy Trimester, ThirdMesenteric CystLaparoscopyFollow-Up StudiesIntestinal PerforationPrenatal DiagnosisCoronary VesselsCarotid ArteriesBiopsy, NeedleHeadNegative-Pressure Wound TherapyDiagnostic ImagingThermographyOvarian CystsLymphangioma, CysticFatal OutcomeAlgorithmsHydronephrosisAdnexal DiseasesSplenic DiseasesAbscessUltrasonography, Doppler, TranscranialFetal HeartMagnetic Resonance Imaging, InterventionalWounds, PenetratingCrown-Rump LengthColonic DiseasesIleal Diseases