An official website of the United States government
Here's how you know
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.
Plot of CEST contrast ratio as a function of ksw with B1 error (a) and B0 error (b). Note that the ratiometric is relatively robust to B1 error, but sensitive to B0 error.