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SNR maps from a subject, acquired with the 20-Ch head coil (top row), 64-Ch head coil (middle row), and 20-Ch coil with uHDC helmet in V1 configuration (bottom row). The SNR of the 20-Ch Coil was strongly enhanced with the uHDC helmet as compared to the baseline 20-Ch coil, and performed similarly to the 64-Ch coil. These SNR maps have been normalized by the corresponding acquired B1+ map.
