Methods and apparatus for blood speckle detection in an...

A - Human Necessities – 61 – B

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A61B 8/12 (2006.01)

Patent

CA 2305653

Methods and apparatus for blood speckle detection for enhanced intravascular ultrasound imaging. The present invention utilizes the fact that the energy scattering strength from blood exhibits a high frequency dependency, while the scattering strength from tissue lacks a strong frequency dependency. In specific embodiments, the present invention may provide a particularly simple and useful solution for addressing the problem of blood speckle in intravascular ultrasound imaging, especially in situations where the blood may have a scattering strength similar to that of tissue and/or where the blood is moving slowly or not at all.

La présente invention concerne un procédé et un appareil permettant de détecter la moucheture par le sang de façon à obtenir une meilleure imagerie intravasculaire par ultrasons. Le principe mis en oeuvre est que l'index de réverbération du sang est fortement fonction des fréquences, alors que l'index de réverbération des tissus n'est pratiquement pas fonction des fréquences. Selon des réalisations particulières, l'invention peut constituer une solution particulièrement simple et appropriée pour résoudre le problème de la moucheture par le sang en imagerie intravasculaire par ultrasons, et ce, notamment dans les cas où le sang est susceptible de présenter un index de réverbération semblable à celui des tissus et/ou dans le cas où la circulation sanguine est lente ou absente.

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