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The experiment setup for the 7T phantom study was demonstrated by: (a) axial and (b) sagittal 2D GRE images. (c) Measured per-channel transmit B1 (B1+) maps of the coil used. (d) Measured field maps using dual-echo GRE methods. (e) The spiral gradient waveforms used for sub-pulse design and (f) the corresponding excitation K-space trajectory.
