Interference-free ultrasound imaging during hifu therapy,...

A - Human Necessities – 61 – B

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A61B 8/00 (2006.01) G01N 29/32 (2006.01) A61N 7/02 (2006.01)

Patent

CA 2576068

Disclosed herein is a method for obtaining a composite interference-free ultrasound image when non-imaging ultrasound waves would otherwise interfere with ultrasound imaging. A conventional ultrasound imaging system is used to collect frames of ultrasound image data in the presence of non-imaging ultrasound waves, such as high-intensity focused ultrasound (HIFU). The frames are directed to a processor that analyzes the frames to identify portions of the frame that are interference-free. Interference-free portions of a plurality of different ultrasound image frames are combined to generate a single composite interference-free ultrasound image that is displayed to a user. In this approach, a frequency of the non-imaging ultrasound waves is offset relative to a frequency of the ultrasound imaging waves, such that the interference introduced by the non-imaging ultrasound waves appears in a different portion of the frames.

L'invention concerne un procédé d'établissement d'image ultrasonore sans interférence, efficace là où des ondes ultrasonores autres que d'imagerie seraient normalement en interférence avec l'imagerie ultrasonore. On utilise un système d'imagerie ultrasonore classique pour recueillir des images de données d'image ultrasonore en présence d'ondes ultrasonores autres que d'imagerie, du type HIFU. Les images sont orientées vers un processeur qui les analyse pour identifier des parties sans interférence, lesquelles, sur plusieurs images ultrasonores différentes, sont combinées en une seule image ultrasonore composite sans interférence affichée pour un utilisateur. Ainsi, on décale une fréquence d'ondes ultrasonores autres que d'imagerie par rapport à une fréquence d'ondes d'imagerie ultrasonore, de sorte que l'interférence introduite par les ondes ultrasonores autres que d'imagerie apparaissent dans une partie différente des images.

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