Slice Acceleration without Parallel Imaging for Diffusion-Weighted Echo-Planar Imaging of the Cervical Spinal Cord

Multi-band acquisitions offer a promising approach to accelerate diffusion-weighted acquisitions but require an appropriate coil geometry. For applications in the human cervical spinal cord such coils are not widely available. Here, it is demonstrated that slice acceleration can be achieved nevertheless by using 2D-selective RF excitations to restrict the excitation to the spinal cord in combination with slice-gradient blips to induce different shifts in the image for the different slices excited. The feasibility of this approach is demonstrated in phantoms and the human cervical spinal cord in vivo.

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