Stationary echo canceling in velocity estimation by time-domain cross-correlation
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چکیده
منابع مشابه
Stationary Echo Canceling in Velocity Estimation by Time-domain Cross-correlation Stationary Echo Canceling in Velocity Estimation by Time-domain Cross-correlation
The application of stationary echo canceling to ultrasonic estimation of blood velocities using time-domain cross-correlation is investigated. Expressions are derived that shows the innuence from the echo canceler on the signals that enter the cross-correlation estimator. It is demonstrated that the ltration results in a velocity dependent degradation of the signal-to-noise ratio. An analytic e...
متن کاملStationary echo canceling in velocity estimation by time-domain cross-correlation
The application of stationary echo canceling to ultrasonic estimation of blood velocities using time-domain cross-correlation is investigated. Expressions are derived that show the influence from the echo canceler on the signals that enter the cross-correlation estimator. It is demonstrated that the filtration results in a velocity-dependent degradation of the signal-to-noise ratio. An analytic...
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The implementationof real-time blood velocity estimators using time-domain cross-correlation is investigated. The basic algorithm is presented for doing stationary echo canceling, cross-correlation estimation and subsequent velocity estimation. Sampled data acquired at rates of approximately 20 MHz are used in the algorithm imposing a heavy burden on the signal processing hardware. The algorith...
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Estimation of blood velocities using ultrasound and time-domain cross-correlation is investigated. The measurement principle is introduced and the basic properties of the cross-correlation function is discussed. Expressions for the variance of the estimates of the peak location are given showing the innuence of integration time, transducer bandwidth and signal-to-noise ratio. It is also shown t...
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The traditional range/velocity limitation for blood velocity estimation systems using ultrasound is elucidated. It is stated that the equation is a property of the estimator used, not the actual physical measurement situation, as higher velocities can be estimated by the time domain cross-correlation approach. It is demonstrated that the time domain technique under certain measurement condition...
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ژورنال
عنوان ژورنال: IEEE Transactions on Medical Imaging
سال: 1993
ISSN: 0278-0062
DOI: 10.1109/42.241874