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.
Representative maps of CBV at systole and early diastole, as well as the corresponding CBV change (ΔCBV) between systole and diastole from a young (21 yrs, male) (a, b and c) and elderly (59 yrs, male)(d, e and f) subject, respectively.