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Abstract #3844

Fast Irregular MRSI spiral acquisition for sparse spectra. Application to 31P MRSI in muscles.

Jabrane Karkouri1,2, Fabien Millioz3, Magalie Viallon3, Rémy Prost3, and Hélène Ratiney3

1Univ Lyon, UJM-Saint-Etienne, INSA, CNRS UMR 5520, INSERM U1206, CREATIS, F-42023, SAINT-ETIENNE, France, Lyon, France, 2Siemens Healthineers, Saint-Denis, France, 3Université de Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR 5220, U1206, Lyon, France

Magnetic resonance spectroscopic imaging (MRSI) has multiple interests in clinical practice but it faces quite long acquisition time in practice which limits its use in a clinical environment. In this work, a new fast Magnetic Resonance Spectroscopic image acquisition method, inspired by Compressed Sensing using the a priori known sparse support of the metabolites chemical shift, is introduced and evaluated based on a k-t space spiral sampling. In the proposed method, the spatial and temporal interleaves are both taken in consideration during the implementation, in order to reach an even faster acquisition. This method has been evaluated using real in vivo 31P data.

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