Doppler based flow measurements

A - Human Necessities – 61 – B

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A61B 8/06 (2006.01) A61B 8/08 (2006.01) G01S 7/52 (2006.01)

Patent

CA 2760809

A new approach to processing and displaying received Doppler signals is disclosed. This approach starts with a set of N power spectra corresponding to each of N times. Those power spectra are then used to create of set of pixels for display with respect to an X axis and a Y axis so that the X coordinate of each pixel in the set corresponds to a time and the Y coordinate of each pixel in the set corresponds to a quantized power level. An attribute (e.g., color or intensity) of each pixel in the set is set to represent the highest velocity for the time-and-quantized-power-level combination that corresponds to the X and Y coordinates of each pixel in the set.

La présente invention concerne un nouveau procédé pour traiter et afficher des signaux Doppler reçus. Ce procédé commence par l'obtention d'un ensemble de N spectres de puissance correspondant à chacun de N moments. Ces spectres de puissance sont alors utilisés pour créer un ensemble de pixels destiné à l'affichage par rapport à un axe X et un axe Y de telle sorte que la coordonnée X de chaque pixel de l'ensemble corresponde à un moment et que la coordonnée Y de chaque pixel dans l'ensemble corresponde à un niveau de puissance quantifié. Un attribut (par exemple couleur ou intensité) de chaque pixel dans l'ensemble est défini pour représenter la vitesse la plus élevée pour la combinaison moment et niveau de puissance quantifié qui correspond aux coordonnées X et Y de chaque pixel de l'ensemble.

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