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. Author manuscript; available in PMC: 2015 Jun 17.
Published in final edited form as: Concepts Magn Reson Part B Magn Reson Eng. 2015 Mar 23;44(3):53–65. doi: 10.1002/cmr.b.21268

Figure 8. Coil performance maps of four 32-element array geometries for various acceleration factors at 3T, for a sagittal plane in the center of a uniform sphere (8.4 cm radius).

Figure 8

Coil noise was included in the calculation of the SNR of the arrays, which is shown for each voxel as a percentage of the corresponding ultimate intrinsic SNR. The gray circle indicates the surface of the sphere. The plots in the bottom row compare vertical and horizontal profiles for each map. The performance of the “helmet” array design is low in the front region not surrounded by coils, but it is comparable with that of the fully enclosing geometries at the center. The performance of the “open-poles” array design decreases significantly in the central region for this image plane orientation.