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Abstract #4033

RF endoluminal coils with NMR electro-optical conversion and transmission for colon wall imaging: Initial finding

Paul Nobre1, Alice Ferrando1, Gwenaël Gaborit2,3, Raphaël Sablong1, and Olivier Beuf1
11Univ. Lyon, CREATIS ; CNRS UMR 5220 ; INSERM U1206 ; INSA-Lyon ; UJM-Saint Etienne ; Université Lyon1 ; 69616 Villeurbanne, France, Lyon, France, 2University of Savoie, IMEP-LAHC, UMR 5130, 73376 Le Bourget-du-Lac, France, Le Bourget-du-Lac, France, 3KAPTEOS, 73376 Sainte-Hélène-du-Lac, France, Sainte-Hélène-du-Lac, France

Receive surface coils in MRI have proven to enable higher spatial or temporal resolution. However, the proximity of the galvanic connexions with the body when the coil is used as receiver coil together with a volume coil can lead to safety issues, in particular for inner coil. This configuration can induce currents in coaxial cable and local SAR increase can be induced. Replacing the galvanic connexions with optical ones could prevent those risks and enable safe colon wall imaging with endoluminal coils. First experimental demonstration of an electro-optic conversion based on Pockel’s effect is demonstrated at 4.7T.

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