Duke Centered	Ella Centered	Charlie Centered	Charlie –50 mm FH	Charlie +50 mm FH
Global SAR
Average SAR for 1 W input power (W/kg)	0.066	0.069	0.091	0.075	0.109
Average SAR per B12 (W/kg/μT2)	0.462	0.465	0.320	0.477	0.484
Average B1+ in central section for 1 W input power (μT)a	0.379	0.385	0.542	0.397	0.475
Peak SAR
Peak local SAR (10 g averaged) for 1 W input power (W/kg)	0.435	0.398	0.487	0.345	0.643
Peak local SAR (10 g averaged) per B12 (W/kg/μT2)	3.04	2.63	1.72	2.19	2.85

^aThe power optimization procedure of the MR imaging scanner software calibrates the needed input power to achieve a certain B₁ in the subject. This calibration is based on the average B₁⁺ in a central section of the subject (brain in this case).