Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Distributions of B1 field (top) and SAR1g (bottom) for an excitation with the body coil driven to produce 1 μT at the center of brain without (left) or with (right) a 5mm-thick shell having a relative electric permittivity of 600 surrounding the head of the subject.
