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- W3145777760 abstract "In color Doppler systems the received RF signal is multiplied by a reference signal and subsequently averaged over a short depth range to obtain a sample of Doppler signal. The mean frequency of the Doppler signal, reflecting the mean velocity of the scatterers moving through the depth range, is obtained by a time-domain autocorrelator. An alternative is to evaluate the time shift of range-gated RF signals over subsequent A-lines, and then give the velocity of the scatterers. This paper presents a frequency-domain autocorrelator to estimate the time shift associated with a high-pass filter for removing small time shift components. It has the same mathematical expression as that for the time-domain autocorrelator, and most of the hardware of the conventional color Doppler systems can be used for its implementation. The first results of computer simulations show that the new estimator is superior to the conventional Doppler technique." @default.
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- W3145777760 date "1995-05-30" @default.
- W3145777760 modified "2023-09-23" @default.
- W3145777760 title "Frequency-Domain Autocorrelator for Estimation of Blood Flow Velocity" @default.
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