PMID: 9447667Jul 1, 1997Paper

A single bit RF domain complex cross-correlation velocity estimator for color flow mapping

Ultrasonic Imaging
P J BrandsL A Ledoux

Abstract

This paper evaluates the performance of a one bit mean frequency estimator to estimate blood flow velocity for ultrasound color flow mapping. This one bit mean frequency estimator, referred to as BC3 estimator, is derived from the recently introduced complex cross-correlation model (C3M) employing the full dynamic data range. The C3M velocity estimator is not suitable for application in color flow mapping because of its high hardware complexity and associated computational load. The BC3 estimator estimates the mean blood flow velocity using only two complex cross-correlation coefficients. For this purpose the latter are computed by means of a complex one bit cross-correlation operation. Each sample of the RF signals is converted into an one bit representation based on the sign of the real and imaginary part of the RF samples. A full derivation and mathematical description of the BC3 estimator is presented. In addition, a thorough performance evaluation of the BC3 estimator in comparison with the full dynamic range C3M velocity estimator is carried out by means of signal simulations to document the effect of signal to noise ratio, sample frequency and bandwidth. For the specific simulation conditions considered the standard devi...Continue Reading

References

Oct 1, 1992·Ultrasonic Imaging·P J Brands, A P Hoeks
Mar 1, 1992·Medical & Biological Engineering & Computing·D DottiP Piazzi
Jan 1, 1994·Ultrasound in Medicine & Biology·A P HoeksR S Reneman
Jul 1, 1994·Medical & Biological Engineering & Computing·J A Jensen
Jan 1, 1996·Ultrasound in Medicine & Biology·K W FerraraV R Algazi
Jan 1, 1991·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·K W Ferrara, V R Algazi
Jan 1, 1990·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·S G FosterW R O'Brien
Jan 1, 1990·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·P M Embree, W R O'Brien

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Citations

Jul 27, 1999·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·A P HoeksR S Reneman

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