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.
B0 difference maps in Hz between NBAir, HBAir, and HBO from a mid-sagittal slice with an anatomical image for reference. Frequency overall is negative with increasing oxygen with the largest changes near the ear canals and olfactory bulb (arrows).
