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Abstract #2887

Feasibility of motion-resolved high resolution cardiac MRI using a local receiver and MR-tracking micro-coils.

Marylène Delcey1,2,3,4, Pierre Bour1,3,5, Isabelle Saniour6, Dounia El Hamrani1,3,5, Valery Ozenne1,3,5, Marie Poirier-Quinot6, and Bruno Quesson1,3,5
1IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac, France, 2Univ. Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, Pessac, France, 3INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux, France, 4Siemens Healthcare SAS, Saint-Denis, France, 5Univ. Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux, France, 6IR4M, UMR8081, Université Paris-Sud/CNRS, Université Paris-Saclay, Orsay, France

In patients presenting cardiac electrical dysfunction, sub-millimetric resolution of CMR would help improving characterisation of the arrhytmogenic substrate. Here, a local coil was placed directly near the anatomic region to image to overpass the lack of sensitivity and selectivity of current conventionnal coils and reduce the voxel size. We implemented a motion compensation method that exploits the signal of micro-coils embodied on a catheter to retrospectively sort radial k-space data prior to ESPIRIT image reconstruction. Using this approach, we present high resolution (300µm), motion-resolved, image of the heart obtained in vivo in pig.

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