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Capteur Rf Endoluminal Incorporant Un Circuit De Découplage Actif Optique

Authors: Aydé, R.; Perrier, A.-L.; Sablong, R.; Duvillaret, L.; Gaborit, G.; Beuf, O.;

Capteur Rf Endoluminal Incorporant Un Circuit De Découplage Actif Optique

Abstract

En IRM, lors de l'émission du champ magnétique Radio Fréquence (RF) B1, le capteur de réception du signal est mis hors résonance pour éviter une concentration du champ magnétique RF d'émission qui risquerait de créer une excitation non uniforme de l'échantillon. Ainsi, les capteurs de réception sont généralement munis d'un circuit de découplage actif dont le composant principal est une diode PIN. La console IRM fournit un courant continu à la diode Pin entrainant un décalage de la fréquence de résonance du capteur et empêchant ainsi la perturbation par le champ B1 d'émission. Notre objectif est ici de développer un circuit de découplage avec une liaison optique entre le capteur et la console d'imagerie pour palier les problèmes de sécurité du patient liés à l'utilisation d'une connexion galvanique entre le système d'imagerie et le capteur endoluminal. A partir des travaux de Korn et al. [1], nous avons réalisé un découplage optique avec un circuit modifié et des composants différents. Dans ce travail, nous comparons les performances d'un capteur à découplage galvanique classique à celles d'un capteur à découplage optique sur la base d'images RM et en comparant leurs Rapports Signal sur Bruit (RSB).

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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