Optical-acoustic imaging device

A - Human Necessities – 61 – B

Patent

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A61B 8/12 (2006.01) G02F 1/00 (2006.01) G02B 5/18 (2006.01) G02B 6/02 (2006.01)

Patent

CA 2348580

The present invention is a guide wire imaging device for vascular or non- vascular imaging utilizing optic acoustical methods, which device has a profile of less than 1 mm in diameter. The ultrasound imaging device of the invention comprises a single mode optical fiber with at least one Bragg grating (8), and a piezoelectric or piezo-ceramic jacket (31), which device may achieve omnidirectional (360°) imaging. The imaging guide wire of the invention can function as the guide wire for vascular interventions, can enable real time imaging during balloon inflation, and stent deployment, thus will provide clinical information that is not available when catheter based imaging systems are used. The device of the invention may enable shortened total procedure times, including the fluoroscopy time, will also reduce radiation exposure to the patient, and the operator.

La présente invention concerne un dispositif opto-acoustique d'imagerie vasculaire ou non-vasculaire par fil-guide. De profil, ce dispositif présente un diamètre inférieur à 1 mm. Le dispositif d'imagerie ultrasonore de l'invention est principalement constitué d'une fibre optique mono-mode à réseau de Bragg (8) et d'une gaine de type piézo-électrique ou piézo-céramique (31). Ce dispositif permet l'imagerie omnidirectionnelle (à 360 DEG ). Ce fil-guide s'utilise comme un fil-guide standard pour interventions vasculaires. Le dispositif permet donc une imagerie en temps réel, y compris pendant le gonflage du ballonnet et le déploiement du stent. On peut ainsi disposer d'informations qui ne seraient pas disponibles dans le cas des systèmes d'imagerie à base de cathéter. Le dispositif de l'invention permet de ce fait de raccourcir la durée globale de la procédure, y compris la durée de la radioscopie, et donc de réduire l'exposition aux rayonnements touchant tant le patient que l'opérateur.

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