Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signals

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Nội dung chi tiết: Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signals

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signals

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound SignalsSteven A. JonesDepartment of Biomedical Engineering The Johns Hopkin

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signalsns University School of Medicine Baltimore, MarylandPublished in: Crc Critical Reviews in Biomedical Engineering, 21:399-483,1993.1List of Symbolsứ(r,

f) B cr cSpatial dependence of the panicle concentration Bandwidth Cross correlation function Cross-correlation coefficient Speed of sounde/r) e(t) ĩ Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signals

fo fa fnax íaađỉ í' G(r) ơ,(r) Gr(r|z) 9.(0 k P(í) p, Rr sr(z,t) s'ĩ \Ắr,t) VTransmitted signal pulse Envelope of a transmitted signal pulse Centroid

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signals

frequency of the Doppler spectrum Carrier frequency Doppler shift frequency Maximum frequency of the Doppler spectrum Mode frequency of the Doppler sp

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound SignalsSteven A. JonesDepartment of Biomedical Engineering The Johns Hopkin

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signalsity at a given z Receiver gate wavenumber propagation vector of the transmitted sound wave Doppler power spectral density Power spectral density of th

e transmitted signal Autocorrelation function. Quadrature signal as a function of particle position and time rf signal returned from the environment f Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signals

luid velocity vector Magnitude of the flow velocityVPComponent of velocity along the probe axis Beam Widtha2v/câịl + -COSỚ 701- -cosớ26 DC ‘one 2dy •p

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signals

VAttenuation constant Phase of the Doppler signal Instantaneous frequencyrbDuration of the transmission gate2rdDelay time between the start of the tr

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound SignalsSteven A. JonesDepartment of Biomedical Engineering The Johns Hopkin

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signalsn the probe and the particle Doppler angle when ứ =02 Angle between the transmitter probe-axis and the target velocity Angle between the receiver prob

e-axis and the target velocity(Ờ zCentroid frequency (2,7 f) Carrier frequency (2<) Pulse repetition frequency ) Doppler shift frequency (2 Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signals

istance from the transducer face3Table of ContentsI.INTRODUCTIONA.BackgroundB.Common Uses of Doppler Ultrasound1.Physiological Parameters2.Diagnostic

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound Signals

Applications3.Other Applicationsc. Objectives and structure of this ReviewII.FUNDAMENTAL CONCEPTSA.The Doppler EffectB.The Doppler Instrument and Down

Fundamental Sources of Error and Spectral Broadening in Doppler Ultrasound SignalsSteven A. JonesDepartment of Biomedical Engineering The Johns Hopkin