Focal neurographic magnetic resonance imaging system

G - Physics – 01 – R

Patent

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Details

G01R 33/483 (2006.01) G01R 33/34 (2006.01) G01R 33/38 (2006.01) G01R 33/385 (2006.01) G01R 33/48 (2006.01) G01R 33/563 (2006.01)

Patent

CA 2163449

A focal magnetic resonance imaging system (20) for generating images of neural structures such as nerves. The system (20) includes a control and analysis system (22), a polarizing system (24), and splint-coil assembly (26). The splint-coil assembly (26) includes a splint (28) and various magnetic and electromagnetic coils (32, 40, 42) incorporated within the splint (28). The splint (28) conforms snugly to a patient's body part, e.g., limb, so that the coils (32, 40, 42) are fixed with respect to the patient's body part. The splint-coil assembly (26) can be positioned independently of a main field generated by the polarizing system (24), and a stabilization apparatus (156) is included for adjustably securing the position of the splint-coil assembly (26) during imaging. A focal magnet assembly (60) that can serve as the polarizing system (24) is also provided. Further provided is a method of operating the control and analysis system (22) to consistently generate images depicting the fascicular structure of nerves (100) by ensuring that image gradients (108) are oriented orthogonal to the nerves (100).

Système d'imagerie focale par résonance magnétique (20) produisant des images des structures nerveuses telles que les nerfs. Ledit système (20) est pourvu d'un système de commande et d'analyse (22), d'un système de polarisation (24) et d'un ensemble attelle-bobines (26). Ledit ensemble attelle-bobines (26) est constitué d'une attelle (28) dans laquelle sont intégrées diverses bobines magnétiques et électromagnétiques (32, 40, 42). Ladite attelle (28) épouse étroitement la forme d'une partie du corps du patient telle qu'un membre, de sorte que lesdites bobines (32, 40, 42) soient fixées par rapport à ladite partie du corps du patient. Cet ensemble attelle-bobines (26) peut être placé indépendamment d'un champ principal généré par le système de polarisation (24), un appareil de stabilisation (156) étant prévu pour maintenir l'ensemble attelle-bobines 926) pendant l'imagerie. Un ensemble à aimant focal (60) pouvant servir de système de polarisation (24) est également prévu. L'invention porte également sur un procédé d'exploitation dudit système de commande et d'analyse (22) de manière à générer des images décrivant la structure fasciculaire des nerfs (100), les gradients d'image (108) étant orientés orthogonalement par rapport aux nerfs (100).

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