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Abstract #3576

Echo-Shifted Multi-Slice EPI Compared with GE-EPI in Median Nerve Stimulation at 7T

Gerda Bjork Grimnisdottir1, Natalia Petridou1,2, Richard Bowtell1

1Sir Peter Mansfield MR Centre, Physics & Astronomy, the University of Nottingham, Nottingham, Nottinghamshire, United Kingdom; 2UMC, Utrecht, Netherlands

The performance of (fast echo-shifted multi-slice) ES-MS EPI and conventional GE-EPI (short/long TR) is compared in fMRI during median nerve stimulation at 7T. Active voxels were found to be more numerous in short TR (0.33s) ES-MS-EPI data, compared with data acquired using standard GE EPI with a long (2s) TR. The tSNR values are similar for all the short TR scans, when the different echo and repetition times are accounted for. ES-MS-EPI enables scanning with more coverage than GE-EPI of the same TR and spatial resolution. Higher temporal resolution facilitates the capture