Reproducibility of ResultsUltrasonography, InterventionalAnatomyEndoscopic Ultrasound-Guided Fine Needle AspirationBiopsy, NeedleSclerosing SolutionsEndosonographyUltrasound, High-Intensity Focused, TransrectalImage-Guided BiopsySclerotherapyUltrasonicsBiopsy, Fine-NeedleUltrasonographyCatheterization, PeripheralSodium Tetradecyl SulfateNerve BlockBrachial PlexusVaricose VeinsTendinopathyAneurysm, FalseMediastinumInjections, IntralesionalInjectionsIatrogenic DiseaseUltrasonography, Doppler, ColorProstateTreatment OutcomeUltrasonic TherapyAnesthetics, LocalInjections, Intra-ArterialMediastinal NeoplasmsRadiography, InterventionalSensitivity and SpecificityHigh-Intensity Focused Ultrasound AblationProspective StudiesFemoral ArteryLidocaineMicrobubblesRetrospective StudiesUltrasonography, PrenatalPancreasBiopsyAnatomy, ComparativePancreatic NeoplasmsFollow-Up StudiesTransducersImaging, Three-DimensionalPain MeasurementAnatomy, ArtisticUltrasonography, DopplerPregnancyProstatic NeoplasmsAnatomy, Cross-SectionalContrast MediaTomography, X-Ray ComputedMagnetic Resonance ImagingMicroscopy, AcousticPhantoms, ImagingSurgery, Computer-AssistedDissectionEquipment DesignModels, AnatomicCadaverImage Processing, Computer-AssistedUltrasonography, MammaryTime FactorsEchoencephalographyGestational AgeImage Interpretation, Computer-AssistedPredictive Value of TestsFetal DiseasesFeasibility StudiesSonicationAlgorithmsImage EnhancementPregnancy Trimester, SecondObserver VariationAcousticsUltrasonography, Doppler, DuplexElasticity Imaging TechniquesSulfur HexafluorideFluoroscopyCalcaneusBlood Flow VelocityFluorocarbonsInfant, NewbornMedical IllustrationUltrasonography, Doppler, PulsedNeedlesCoronary VesselsPhonophoresisDiagnostic ImagingRisk FactorsPregnancy Trimester, FirstPalpationHigh-Energy Shock WavesStentsComputer SimulationPrenatal DiagnosisAngiography