Radio frequency gradient and shim coil

Details Radio frequency gradient and shim coil Radio frequency gradient and shim coil

G - Physics

01

R

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

Patent

CA 2482801

A plurality of linear current elements (130B) are configured about a specimen to be imaged. A current in each current element is controlled independent of a current in other current elements to select a gradient and to provide radio frequency shimming. Each current element is driven by a separate channel of a transmitter and connected to a separate channel of a multi-channel receiver. The impedance, and therefore, the current, in each current element is controlled mechanically or electrically.

Plusieurs éléments de courant linéaire (130B) sont configurés autour d'un spécimen à imager. Dans chaque élément de courant, on régule un courant indépendamment d'un courant dans les autres éléments de courant de façon à choisir un gradient et réaliser une compensation de radiofréquence. Chaque élément de courant, attaqué par un canal séparé d'un émetteur, est connecté à un canal séparé d'un récepteur multicanal. La régulation de l'impédance, et donc du courant, de chaque élément de courant se fait mécaniquement ou électriquement.

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