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Abstract #4437

Reduced field-of-view diffusion with 2D echo-planar RF excitation and Multiband refocusing for extended slice coverage and robust fat suppression

Suchandrima Banerjee 1 , Emine Ulku Saritas 2,3 , Rachel Connett 1 , and Ajit Shankaranarayanan 1

1 Global Applied Science Laboratory, GE Healthcare, Menlo Park, California, United States, 2 Department of Electrical and Electronics Engineering, Bilkent University, Bilknet, Ankara, Turkey, 3 National Magnetic Resonance Research Center, Bilknet University, Bilknet, Ankara, Turkey

Reduced field-of-view (rFOV) single-shot echo-planar imaging (ssEPI) with 2D Echo-planar (EP) RF excitation can improve diffusion image quality and enable high resolution, by reducing distortion. However slice coverage can be limited because of periodic repetitions of the excitation sidelobes appearing along the slice direction. We propose to address this constraint by using a multiband refocusing scheme that will simultaneously refocus multiple excitation lobes. Signal from the simultaneously refocused slice locations can be separated using parallel imaging method. We demonstrate that by using multiband refocusing with 2D EPRF in ssEPI, slice coverage can be increased while preserving rFOV and fat suppression.

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