Fig. 1.

Calculated distribution of temperature increase (°C) for a human head in a volume coil for 30 minutes at 300 MHz with a head-average SAR of 3.0 W/kg, 6.0 W/kg, 9.0 W/kg, and 12.0 W/kg (left to right) with consideration of physiological response on an axial plane passing through the eyes (top), an axial plane passing through the center of the coil and brain (2^nd row), and sagittal and coronal planes passing through the center of the coil and brain (3^rd and bottom rows).