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- W2140141338 abstract "A significant improvement in blood velocity estimation accuracy can be achieved by simultaneously processing both temporal and spatial information obtained from a sample volume. Use of the spatial information becomes especially important when the temporal resolution is limited. By using a two-dimensional sequence of spatially sampled Doppler signal snapshots an improved estimate of the Doppler correlation matrix can be formed. Processing Doppler data in this fashion addresses the range-velocity spread nature of the distributed red blood cell target, leading to a significant reduction in spectral speckle. Principal component spectral analysis of the snapshot correlation matrix is shown to lead to a new and robust Doppler mode frequency estimator. By processing only the dominant subspace of the Doppler correlation matrix, the Cramer-Rao bounds on the estimation error of target velocity is significantly reduced in comparison to traditional narrowband blood velocity estimation methods and achieves almost the same local accuracy as a wideband estimator. A time-domain solution is given for the velocity estimate using the root-MUSIC algorithm, which makes the new estimator attractive for real-time implementation." @default.
- W2140141338 created "2016-06-24" @default.
- W2140141338 creator A5036195583 @default.
- W2140141338 creator A5073035943 @default.
- W2140141338 date "1998-07-01" @default.
- W2140141338 modified "2023-10-14" @default.
- W2140141338 title "A new time-domain narrowband velocity estimation technique for Doppler ultrasound flow imaging. I. Theory" @default.
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- W2140141338 doi "https://doi.org/10.1109/58.710565" @default.
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