Abstract #0593

2D EPI at 9.4T with slice-specific spokes pulse RF excitation for B1+ homogenisation

Benedikt A Poser ¹ and Desmond HY Tse ^1,2

¹ Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, Netherlands, ² Department of Radiology, Maastricht University, Maastricht, Netherlands

Slice-specific spokes pulses were designed for and applied to high resolution 2D EPI imaging at 9.4T in order to mitigate the signal and SNR variations across the brain due to RF inhomogeneity as typically encountered at ultra-high field. Improvements in signal homogeneity are demonstrated when using the slice-specific three-spokes RF pulses instead of the coils CP mode excitations. The B1+ shimmed EPI sequence is applied to BOLD fMRI scans.

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