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 Chauffert^1,2, Alexandre Vignaud¹, Philippe Ciuciu^1,2, 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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