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Abstract #4573

3D SPARKLING for accelerated ex vivo T2*-weighted MRI with compressed sensing

Carole Lazarus1,2, Pierre Weiss3,4,5, Franck Mauconduit6, Alexandre Vignaud1, and Philippe Ciuciu1,2

1NeuroSpin, CEA Saclay, Gif-sur-Yvette, France, 2Parietal, INRIA, Saclay, France, 3ITAV, Toulouse, France, 4CNRS, Toulouse, France, 5Université de Toulouse, Toulouse, France, 6Siemens Healthineers, Saint-Denis, France

In the last decade, compressed sensing (CS) has been successfully used in MRI to reduce the acquisition time. Recently, we have proposed a new optimization-driven algorithm to design optimal non-Cartesian sampling patterns for CSMRI, called SPARKLING for Spreading Projection Algorithm for Rapid K-space sampLING. This method has a few advantages compared to standard trajectories such as radial lines or spirals: i) it allows to reproduce arbitrary densities while the other two are restricted to radial densities and ii) it is more robust to system imperfections. In this communication, we introduce an extension of the SPARKLING method for 3D imaging that allows to achieve an isotropic resolution of 600 μm in just 45 seconds for T2*-weighted ex vivo brain imaging at 7 Tesla.

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