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Abstract #2541

Impact of B0 field imperfections correction on BOLD sensitivity in 3D-SPARKLING fMRI data

Zaineb Amor1, Caroline Le Ster1, Chaithya G.R.1,2, Guillaume Daval-Frérot1,2,3, Bertrand Thirion1,2, Nicolas Boulant1, Franck Mauconduit1, Christian Mirkes4, Philippe Ciuciu1,2, and Alexandre Vignaud1
1Université Paris-Saclay, CEA, NeuroSpin, CNRS, Gif-sur-Yvette, France, 2Université Paris-Saclay, Inria, MIND, Palaiseau, France, 3Siemens Healthineers, Saint-Denis, France, 4Skope Magnetic Resonance Technologies AG, Zurich, Switzerland

Synopsis

Keywords: Data Acquisition, fMRIStatic and dynamic ∆B0 field imperfections are detrimental for fMRI applications as they degrade the temporal SNR (tSNR) and the sensitivity to the BOLD contrast. In this work we propose an experimental protocol for field imperfection monitoring and correction on 3D-SPARKLING fMRI data using the Skope Clip-on field camera in an alternative setting challenging its long TR constraint. We demonstrate the viability of our protocol and the reproducible gain in image quality, tSNR and retinotopic maps when correcting static and dynamic field imperfections on resting-state and task-based fMRI data for 3 healthy volunteers

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Keywords