Abstract #2451

Prospects of non-Cartesian 3D-SPARKLING encoding for functional MRI: A preliminary case study for retinotopic mapping

Zaineb Amor¹, Chaithya G.R.^1,2, Guillaume Daval-Frérot^1,2,3, Bertrand Thirion^1,2, Franck Mauconduit¹, Philippe Ciuciu^1,2, and Alexandre Vignaud¹

¹Université Paris-Saclay, CEA, Neurospin, CNRS, Gif-sur-Yvette, France, ²Université Paris-Saclay, Inria, Parietal, Palaiseau, France, ³Siemens Healthcare SAS, Saint-Denis, France

Synopsis

For the first time, non-Cartesian 3D-SPARKLING (Spreading Projection Algorithm for Rapid K-space sampLING) encoding scheme was used for task-based fMRI (retinotopic mapping) at 7T. Additionally, this new acquisition technique was compared with 3D-EPI, considered as one of the reference acquisition schemes in high-resolution fMRI. The experiment was performed on a single participant at 1mm isotropic and for a temporal resolution of 2.4s. We found that both techniques yield similar statistically significant activation patterns in the visual cortex.

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