Mr imaging method and medical device for use in method

Details Mr imaging method and medical device for use in method Mr imaging method and medical device for use in method

A - Human Necessities

61

B

A61B 5/06 (2006.01) A61B 5/055 (2006.01) A61C 8/00 (2006.01) A61F 2/01 (2006.01) A61F 2/24 (2006.01) A61F 2/36 (2006.01) A61M 25/095 (2006.01) G01V 3/14 (2006.01)

Patent

CA 2306124

The invention relates to an MR imaging method for representing and determining the position of a medical device inserted in an examination object, and to a medical device used in the method. In accordance with the invention, the device comprises at least one passive oscillating circuit with an inductor and a capacitor. The resonance frequency of this circuit substantially corresponds to the resonance frequency of the injected high- frequency radiation from the MR system. In this way, in a locally limited area situated inside or around the device, a modified signal answer is generated which is represented with spatial resolution.

L'invention concerne un procédé d'imagerie par résonance magnétique, servant à représenter et à déterminer la position d'un dispositif médical introduit dans un objet à examiner, ainsi qu'un dispositif médical à utiliser conjointement avec ledit procédé. Selon l'invention, ce dispositif (11) comprend au moins un circuit oscillant passif ayant une inductance (2a, 2b) et une capacitance (3a, 3b), et dont la fréquence de résonance correspond sensiblement à la fréquence de résonance du rayonnement haute fréquence injecté provenant du système à résonance magnétique. On obtient ainsi dans une zone limitée localement, qui est située à l'intérieur ou autour du dispositif, une réponse de signal modifiée qui est représentée à résolution spatiale.

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