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Abstract #4073

Experimental Realization of a Clinical Opencage Head Coil for Ultra-High Field MRI

Anton Nikulin1, Marc Dubois2,3, Tania S.Vergara Gomez2,3, Djamel Berrahou4, Frank Kober3, Alexandre Vignaud5, Redha Abdeddaim2, Julien de Rosny1, and Abdelwaheb Ourir1
1Institut Langevin, ESPCI Paris, CNRS, PSL University, Paris, France, 2CNRS, Centrale Marseille, Institut Fresnel, Aix Marseille Univ, Marseille, France, 3CNRS, CRMBM, Aix Marseille Univ, Marseille, France, 4Multiwave Innovation SAS, Marseille, France, 5CEA, DRF, JOLIOT, NeuroSpin, UNIRS, Universit´e Paris-Saclay, Gif-sur-Yvette, France

A conventional birdcage head coil at 7T is not well suited for certain applications such as motion control. We propose an original coil based on a birdcage with a wide lateral aperture that provides access to the object under examination. We show that a sufficiently homogeneous magnetic field distribution can be obtained by optimizing the current distribution of such an “Opencage”. That coil was optimized using a full wave simulation and tested experimentally. The performance of an Opencage coil was compared to a commercial birdcage coil. Eventually, the Opencage coil is shown as a tradeoff between field homogeneity and access.

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