Table 2. Labels of the Optimized Regions of Interest Shown in Figs. 4–7.

Label	Orientation	Thickness (cm)	Region
A	N/A	N/A	Whole head
B	N/A	N/A	Brain
C	Inferior	3	Axial slab
D	Middle	3	Axial slab
E	Superior	3	Axial slab
F	Posterior	3	Coronal slab
G	Middle	3	Coronal slab
H	Anterior	3	Coronal slab
I	Left (seen from the back)	3	Sagittal slab
J	Middle	3	Sagittal slab
K	Right (seen from the back)	3	Sagittal slab
L	Middle	6	Axial slab
M	Middle	6	Coronal slab
N	Middle	6	Sagittal slab

The columns represent the orientations, thicknesses, and directions of the 3D regions (labeled A through N) over which the homogeneity of ${\mathit{\text{B}}}_1^{+}$ field distribution was optimized to achieve minimal coefficient of variation while constraining the total (over the whole head) RF power deposition to be less than or equal to that obtained with quadrature excitation.