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Abstract #3962

Parallel 2D-RF Excitation for Arbitrarily Shaped Regionof-Interest MR Spectroscopy at 16.4 T

Dinesh K. Deelchand1, Xiaoping Wu1, Pierre-Gilles Henry1, Pierre-Francois Van de Moortele1

1Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States

In this study we demonstrate with phantom experiments the feasibility of selectively exciting arbitrary shaped voxel using 2D-RF pulse design (segmented radial k-space trajectory) with parallel RF excitation at 16.4 T while achieving sufficient excitation bandwidth for 1H MR spectroscopy. A novel simulation guided segment-wise RF pulse design is introduced to tackle the issue of gradient imperfection and is shown to preserve the excitation quality in the presence of gradient waveform deviations.