MORE-SPARKLING: Non-Cartesian trajectories with Minimized Off-Resonance Effects
Chaithya G R1,2, Guillaume Daval-Frérot1,2,3, Aurélien Massire3, Boris Mailhe4, Mariappan Nadar4, Alexandre Vignaud1, and Philippe Ciuciu1,2
1NeuroSpin, Joliot, CEA, Université Paris-Saclay, F-91191, Gif-sur-Yvette, France, 2Inria, Parietal, Université Paris-Saclay, F-91120, Palaiseau, France, 3Siemens Healthcare SAS, Saint-Denis, 93210, France, 4Siemens Healthineers, Princeton, NJ, United States
We augment the recently introduced SPARKLING algorithm and propose an improved mathematical formulation that takes the temporal dependence of the MR signal into account. This prevents the trajectories from sampling similar portions of k-space at different times, thereby reducing distortions and blurring induced by \(B_0\) inhomogenieties. Overall, these trajectories present a smooth distribution over time in k-space and Minimized Off-Resonance Effects (MORE-SPARKLING), verified both retrospectively and prospectively with scans performed in vivo at 3T on a healthy volunteer.
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