Motion-Compensated Interleaved Spiral Acquisition for FMRI

Heiko Schmiedeskamp¹, Murat Aksoy¹, Gary H. Glover¹, Roland Bammer¹

We propose combining a low-resolution spiral-in navigator trajectory with the acquisition of a higher-resolution interleaved spiral-out readout trajectory for motion-compensated multi-shot fMRI. Therefore, the navigator trajectory is used for two purposes: 1) for in-plane motion correction and realignment of multi-shot data, 2) for separate low-resolution fMRI analysis in order to extend functional analysis by a low-resolution dataset. Thus, the presented method facilitates high-resolution motion-corrected interleaved spiral-acquisition with additional low-resolution images to either mask high resolution data or to compare BOLD-activation acquired with two different image resolutions.