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Abstract #4799

Electro-optic RF magnetic resonance signal based on a Ti:LiNbO3 waveguide

Reina Ayde 1 , Anne-Laure Perrier 1 , Jean Dahdah 2 , Raphael Sablong 1 , Lionel Duvillaret 2 , Gwenael Gaborit 2,3 , and Olivier Beuf 1

1 University of Lyon 1, CREATIS - CNRS UMR 5220 INSERM U1044, Villeurbanne, Rhone-Alpes, France, 2 Kapteos, Rhone-Alpes, France, 3 University of Savoie, IMEP-LAHC UMR 5130, Rhone-Alpes, France

The use of metallic coaxial cables in Magnetic Resonance Imaging could induce local high Specific Absorption Rate (SAR). Optical fiber link could be a promising alternative to coaxial cables for MRI to ensure patient safety. Here, the conversion of the Radio-Frequency magnetic field into an electric signal by electro-optic effect was demonstrated and characterized. A waveguide crystal is used together with an endoluminal coil to demonstrate the ability of such transducer to perform a deported characterization of Radio-Frequency magnetic field at 3T. The results show a good agreement with theoretical values and a minimum magnetic detectable field of pT order.

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