Tem resonator for magnetic resonance imaging

G - Physics – 01 – R

Patent

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Details

G01R 33/34 (2006.01) G01R 33/36 (2006.01)

Patent

CA 2373526

An RF coil suitable for use in imaging systems is provided which coil has a dielectric filled cavity formed by a surrounding conducting enclosure, the conducting enclosure preferably being patterned to form continuous electrical paths around the cavity, each of which paths may be tuned to a selected resonant frequency. The patterning breaks up any currents induced in the coil and shortens path lengths to permit higher frequency, and thus higher field strength operation. The invention also includes improved mechanisms for tuning the resonant frequency of the paths, for selectively detuning the paths, for applying signal to the coil, for shortening the length of the coil and for controlling the field profile of the coil and the delivery of field to the object to the image.

L'invention porte sur un bobinage HF approprié pour être utilisé dans des systèmes d'imagerie. Ce bobinage comporte une cavité remplie d'un diélectrique et formée par une enceinte de conduction, cette dernière étant de préférence configurée de façon à former des trajets électriques autour de la cavité, chacun de ces trajets pouvant être accordé à une fréquence de résonance sélectionnée. Cette configuration coupe tous courants induits dans le bobinage et raccourcit les longueurs de trajet pour permettre une plus haute fréquence, et par conséquent une intensité de champ plus élevée. Cette invention porte également sur des mécanismes améliorés destinés à accorder la fréquence de résonance des trajets, désaccorder sélectivement les trajets, envoyer un signal au bobinage, raccourcir la longueur du bobinage et contrôler le profil du champ du bobinage et appliquer le champ sur l'objet de l'image.

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