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Abstract #2222

Merging Cartesian and non-Cartesian sampling through GoLF-SPARKLING

Chaithya G R1,2, Guillaume Daval-Frérot1,2,3, Aurélien Massire3, Alexandre Vignaud1, and Philippe Ciuciu1,2
1Neurospin, CEA Paris Saclay, Gif-sur-Yvette, 91191, France, 2Inria, MIND, Palaiseau, 91120, France, 3Siemens Healthineers, Saint-Denis, 93210, France

Synopsis

Keywords: New Trajectories & Spatial Encoding Methods, Brain

Cartesian sampling can acquire a given k-space region with minimum redundancy, while non-Cartesian sampling can help achieve a larger k-space coverage. Through generalized affine constraints in SPARKLING and an adapted target sampling density, for the first time non-Cartesian and Cartesian sampling are merged within same trajectory, giving the best of both worlds. With Gridding of Low Frequencies (GoLF), we get SPARKLING k-space trajectories which carry out Cartesian sampling at the center of k-space. This approach paves the way for designing new kind of compound sampling patterns, which enforces Cartesian and non-Cartesian sampling within the same trajectory.

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Keywords