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. Author manuscript; available in PMC: 2021 Mar 1.
Published in final edited form as: Magn Reson Med. 2019 Sep 10;83(3):1123–1134. doi: 10.1002/mrm.27962

Figure 9:

Figure 9:

Geometry factor maps, 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). Maps at acceleration factor 4 for both GRAPPA (left column) and SENSE (right column) are displayed. The geometry factor of the 20-Ch coil was modestly reduced with the uHDC helmet present, though not to the level of the 64-Ch coil.