Measurement of volumetric fluid flow and its velocity profile

Details Measurement of volumetric fluid flow and its velocity profile Measurement of volumetric fluid flow and its velocity profile

G - Physics

01

F

G01F 1/66 (2006.01) A61B 8/00 (2006.01) A61B 8/06 (2006.01)

Patent

CA 2270534

A method to measure spatial fluid flow components and their velocity profiles in a number of locations in a cross-sectional area of a lumen or other body cavity by using ultrasound in which the cross-sectional area is interrogated by a plurality of ultrasonic beams; the estimation of the spatial flow components is obtained from a combination of estimations of axial, lateral and total flow; the estimation of one or more flow components is obtained through any combination of time-shift and decorrelation analysis of two or more beam- signals of the interrogating ultrasound transducer; and the estimation accuracy is further improved by the use of a reference decorrelation curve obtained from experiments or beam-theory or both.

Procédé servant à mesurer les composantes spatiales de l'écoulement d'un liquide et leurs profils de vitesse dans plusieurs emplacements de la section transversale d'une lumière ou d'une autre cavité corporelle au moyen d'ultrasons, ce qui consiste à diriger une pluralité de faisceaux d'ultrasons sur la section transversale; à obtenir l'estimation des composantes spatiales d'écoulement à partir d'une combinaison d'estimations de l'écoulement axial, latéral et total; à obtenir l'estimation d'une ou de plusieurs composantes d'écoulement par l'intermédiaire de toute combinaison d'analyse à décalage dans le temps et d'analyse de décorrélation de deux ou de plusieurs signaux de faisceaux du transducteur d'interrogation à ultrasons; à améliorer encore la précision de l'estimation au moyen d'une courbe de décorrélation de référence obtenue à partir de théories ou d'expérimentations concernant les faisceaux.

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