title: Velocity fluctuation reduction in vector Doppler ultrasound using a hybrid single/dual-beam algorithm.
abstract: In order to reduce the fluctuations in the velocity magnitude estimate, we propose a modification to the standard algorithm for reconstructing the (two component) vector velocity from the measured Doppler shifts in two directions. This uses the standard dual-beam algorithm, combined with temporal smoothing, to find only the velocity angle, then uses the single-beam algorithm to estimate the velocity magnitude. We present initial data showing the significant reduction in velocity estimate fluctuation that this hybrid method achieves compared to the standard algorithm.
authors.forename: Robin
authors.initials: R
authors.lastname: Steel
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Fish
authors.forename: Kumar V
authors.initials: KV
authors.lastname: Ramnarine
authors.forename: Aline
authors.initials: A
authors.lastname: Criton
authors.forename: Helen F
authors.initials: HF
authors.lastname: Routh
authors.forename: Peter R
authors.initials: PR
authors.lastname: Hoskins
mesh_terms: D000465:Algorithms; D001783:Blood Flow Velocity; D001808:Blood Vessels / Q000000981:diagnostic imaging* / Q000502:physiology; D003198:Computer Simulation; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D019047:Phantoms, Imaging; D011786:Quality Control; D018608:Ultrasonography, Doppler / Q000295:instrumentation / Q000379:methods*