UltrasonographyReproducibility of ResultsUltrasonography, Doppler, TranscranialTranscranial Magnetic StimulationUltrasonography, Doppler, ColorUltrasonography, DopplerUltrasonography, Doppler, PulsedBlood Flow VelocityEvoked Potentials, MotorDoppler EffectUltrasonography, PrenatalEchoencephalographyUltrasonicsMotor CortexUltrasonography, InterventionalUltrasonic TherapyEchocardiography, Doppler, PulsedCerebrovascular CirculationUltrasonography, Doppler, DuplexSensitivity and SpecificityEchocardiography, Doppler, ColorMiddle Cerebral ArteryCerebral ArteriesMicrobubblesProspective StudiesEndosonographyHigh-Intensity Focused Ultrasound AblationContrast MediaPregnancyTransducersPulsatile FlowPredictive Value of TestsUltrasonography, MammaryIntracranial EmbolismRegional Blood FlowImaging, Three-DimensionalMagnetic Resonance ImagingTomography, X-Ray ComputedLaser-Doppler FlowmetryFetal DiseasesPyramidal TractsSulfur HexafluorideFunctional LateralityObserver VariationElectromyographyIntracranial Embolism and ThrombosisCarotid StenosisCircle of WillisGestational AgeUmbilical ArteriesTime FactorsMonitoring, IntraoperativeElectric StimulationPhosphenesCarotid Artery DiseasesImage EnhancementTreatment OutcomePregnancy Trimester, SecondHandCarotid ArteriesValsalva ManeuverMagneticsRetrospective StudiesStrokeSkullElectromagnetic FieldsReference ValuesCerebrovascular DisordersFollow-Up StudiesCerebral AngiographyArterial Occlusive DiseasesAnalysis of VarianceImage Processing, Computer-AssistedHemodynamicsReaction TimeCarotid Artery, InternalEmbolism, AirBrainFeasibility StudiesElectromagnetic PhenomenaImage Interpretation, Computer-AssistedFetal HeartVascular ResistanceDiastoleInfant, NewbornEchocardiographyPlacental CirculationElectric Stimulation TherapyAngiographyMicroscopy, AcousticBasilar ArteryOphthalmic ArteryAcousticsPregnancy Trimester, FirstUterusVertebral ArteryBlood PressureMuscle, SkeletalAngiography, Digital SubtractionPalpation