3D-EPI ASL at Ultra High Field

Emma Louise Hall¹, Penny A. Gowland¹, Susan T. Francis¹

3D acquisitions are advantageous to ASL to eliminate slice dependent variation in signal. Here we show the feasibility of 3D-EPI arterial spin labelling (ASL) at 7T. Using SENSE acceleration in two directions the shot length can be significantly reduced allowing improved spatial coverage or spatial resolution to be achieved. 3D-EPI ASL is shown to benefit from increased signal-to-noise ratio and overcome SAR limits reached when using 2D-EPI ASL at 7T.Whole head (20 slice) 2x2x3mm³ 3D-EPI perfusion images can be acquired in 5 minutes.