A transducer with multiple resonant frequencies for an...

A - Human Necessities – 61 – B

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A61B 8/12 (2006.01)

Patent

CA 2487917

A single transducer element that is capable of oscillation at a plurality of natural resonant frequencies may be used in an ultrasonic imaging catheter assembly including a catheter body configured to be inserted and guided through the vascular system of a living being, a lumen and a rotatable imaging core adapted to pass through the lumen, the imaging core including a flexible drive-shaft. Because the transducer element is capable of oscillation at a plurality of natural resonant frequencies, a user can switch from one frequency to another in order to improve the depth of field or resolution without having to switch out the catheter or imaging core.

L'invention concerne un élément de transducteur unique pouvant osciller à une pluralité de fréquences résonnantes naturelles qui peut être utilisé dans un ensemble cathéter d'imagerie ultrasonore. Ledit ensemble cathéter comprend un corps de cathéter configuré de façon à être introduit dans le système vasculaire d'un être vivant et guidé à travers celui-ci, une lumière et un noyau d'imagerie rotatif conçu pour traverser la lumière, ledit noyau d'imagerie comprenant un arbre d'entraînement souple. Du fait que l'élément de transducteur peut osciller à une pluralité de fréquences résonnantes naturelles, un utilisateur peut passer d'une fréquence à une autre afin d'améliorer la profondeur de champ ou de résolution sans retrait du cathéter ou du noyau d'imagerie.

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