title: High resolution processing techniques for ultrasound doppler velocimetry in the presence of colored noise. Part I: Nonstationary methods.
abstract: Real-time flow velocity measurement is a practical issue in industrial and biomedical applications. Because their good frequency resolution, parametric methods such as autoregressive (AR) modeling and time-frequency distributions (TFD) are generally preferred to Fourier analysis. However, these methods become highly inaccurate in the presence of colored noise. We review here the principal parametric and nonparametric techniques and show their limitations in the estimation of Doppler frequency in the presence of strong colored noise. Different solutions to overcome these limitations are then proposed and compared using synthetic Doppler signals with colored noise.
authors.affiliation: LUSSI, GIP Ultrasons Tours, France. kouame@univ-tours.fr
authors.forename: Denis
authors.initials: D
authors.lastname: Kouamé
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Girault
authors.forename: Frédéric
authors.initials: F
authors.lastname: Patat
mesh_terms: D000465:Algorithms; D001783:Blood Flow Velocity; D001808:Blood Vessels / Q000000981:diagnostic imaging* / Q000502:physiology*; D007089:Image Enhancement / Q000379:methods*; D015233:Models, Statistical; D011786:Quality Control; D012212:Rheology / Q000295:instrumentation / Q000379:methods*; D012680:Sensitivity and Specificity; D013269:Stochastic Processes; D018608:Ultrasonography, Doppler / Q000379:methods*