Improved spatial resolution for Looping Star fMRI using UNFOLD

Motivation: Looping Star is a silent fMRI pulse sequence that is often highly undersampled in k-space at high spatial resolution. Goal(s): This work aims to improve spatial resolution by increasing coverage of k-space over time. Approach: We propose to use a cycle of 10 spherical sampling patterns with UNFOLD post-processing to reduce aliasing artifacts. Results: Our methods significantly reduced spatial artifacts and improved fMRI activation t-scores. Impact: The results of this work will improve spatial resolution Looping Star fMRI studies with high undersampling rates.