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Abstract #2625

Experimental and simulated distribution of the RF electrical field inside a birdcage coil

Isabelle Saniour1, Gwenaël Gaborit2,3, Lionel Duvillaret3, Anne-Laure Perrier2, and Olivier Beuf1

1Univ. Lyon, CREATIS ; CNRS UMR 5220 ; INSERM U1206 ; INSA-Lyon ; UJM-Saint-Etienne ; Université Lyon1, Villeurbanne, France, 2Univ. Savoie-Mont-Blanc, IMEP-LAHC, Le Bourget-du-Lac, France, 3Kapteos, Sainte-Hélène-du-Lac, France

High-field MR systems bring additional safety issues regarding the patient. One of main concern is the heating effect caused by the high-frequency and high-power signals that can be picked up by the conductors. It is thus required to identify these regions and to quantify the electrical E-field knowing that it is proportional to the square of the temperature elevation. For a direct measurement, an optical probe was used to perform a mapping of the E-field distribution inside a birdcage of a preclinical MRI. Experiments and simulations were found similar with E-field concentrations mainly located close to the capacitors.

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