A method for processing real-time contrast enhanced...

A - Human Necessities – 61 – B

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A61B 8/00 (2006.01) A61B 8/06 (2006.01) G01S 15/89 (2006.01)

Patent

CA 2217184

The present invention is a novel method for producing real-time colorized, contrast enhanced images from a sequence of grey-scale video images obtained during diagnostic ultrasound. The particular colorizing scheme varies according to which information parameter is desired to be displayed in real- time. The information parameters used to colorize a segment of video images include: time-to-arrival, duration of brightening, and absolute brightening. Time-to-arrival colorization depicts the time that a given pixel achieves a given intensity threshold. Duration of brightening depicts the time that a given pixel's intensity stays above a given threshold. Absolute brightening depicts various threshold values obtained by the region's pixels.

La présente invention concerne un procédé nouveau de production d'images colorisées, en temps réel et à contraste amélioré, à partir d'une séquence d'images vidéo à échelle de gris obtenues lors d'un diagnostic aux ultrasons. La procédure de colorisation particulière varie selon le paramètre d'information dont on désire la représentation en temps réel. Les paramètres d'information utilisés pour coloriser un segment d'images vidéo comprennent: temps à passer jusqu'à l'arrivée, durée d'éclaircissement et éclaircissement absolu. La colorisation fondée sur le temps à passer jusqu'à l'arrivée indique le temps pendant lequel un pixel donné atteint un seuil d'intensité donné. La durée de l'éclaircissement indique le temps pendant lequel l'intensité d'un pixel donné est supérieure à un seuil donné. L'éclaircissement absolu indique diverses valeurs de seuils atteintes par les pixels de la zone.

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