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Abstract #3940

Assessment of benefit to use a non-Cartesian trajectory and nonlinear reconstruction method compared to a Cartesian strategy for Fast 31P MRI

Arthur Coste1, Nicolas Chauffert1,2, Alexandre Vignaud1, Philippe Ciuciu1,2, Fawzi Boumezbeur1, Pierre Weiss3, Sandro Romanzetti4, Denis Le Bihan1, and Cécile Lerman1

1MR Imaging and Spectroscopy Unit, NeuroSpin, Gif sur Yvette, France, 2Parietal, INRIA Saclay, Saclay, France, 3Institut des Technologies Avancées du Vivant, Toulouse, France, 4University Clinic RWTH Aachen, Aachen, Germany

This work illustrates the application of a wavelet based least square regularized image reconstruction for non-Cartesian MR sampling trajectories in the framework of low concentration Phosphorus Imaging. We compared performances between 3D Cartesian Fast Imaging with Steady-state free Precession (FISP) and the TPI (FISP) sequence and show that in equivalent acquisition durations we are able to produce better images with the TPI sequence. Prospective sub-sampling was also performed and results open exciting possibilities to reduce acquisition time without impacting image quality for non-proton MRI.

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