Systems and methods for visualizing interior tissue regions

A - Human Necessities – 61 – B

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A61B 8/12 (2006.01) A61B 1/05 (2006.01) A61B 5/042 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2270150

An imaging element characterizes tissue morphology by analyzing perfusion patterns of a contrast media in tissue visualized by the imaging element, to identify infarcted tissue. In a preferred implementation, a catheter tube (12) introduced into a heart region carries the imaging element (34), as well as a support structure (20) spaced from the imaging element, which contracts endocardial tissues. The imaging element is moved as the imaging element visualizes tissue. A selected electrical event is sensed in surrounding myocardial tissue which regulates movement of the imaging element. The support element stabilizes the moving imaging element as it visualizes tissue, providing resistance to dislodgment or disorientation despite the presence of dynamic forces.

Un dispositif de formation d'images caractérise la morphologie d'un tissu par une analyse de configurations de perfusion de milieux de contraste dans le tissu qu'il est en train de visualiser, afin d'identifier un tissu ayant fait l'objet d'un infarcissement. Dans un mode de réalisation préféré, un tube cathéter (12) introduit dans la région du coeur est porteur du dispositif de formation d'images (34) ainsi que d'une structure de support (20), distincte dudit dispositif, servant à contracter le tissu endocardiaque. Ce dispositif de formation d'images se déplace au fur et à mesure qu'il visualise un tissu. Le système détecte un phénomène électrique sélectionné dans le tissu endocardiaque environnant et régule le déplacement du dispositif de formation d'images. L'élément de support stabilise le dispositif de formation d'images en mouvement lorsqu'il visualise le tissu, opposant une résistance au décollement et à la désorientation en dépit de la présence de forces dynamiques.

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