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. Author manuscript; available in PMC: 2015 Jun 8.
Published in final edited form as: J Magn Reson Imaging. 2012 Jul;36(1):55–72. doi: 10.1002/jmri.23639

Figure 4.

Figure 4

(a) An example head coil array made up of eight independent receiver coils arranged around the object in a circle. Each coil is more sensitive to signal originating from the tissue closest to it, and can be used to form its own image (small images). The independent coil images can be combined into a single image with uniform sensitivity (large center image). (b) An example linear array made up of five coils, where the sensitivity profile of each array is similar in the horizontal direction, but the sensitivity decreases with distance along the vertical direction. When using such a coil, acceleration can only be performed in the vertical direction where there is substantial variation in the coil sensitivities.