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.
Time stability of normalized VT values. Time stability of MA1-estimated VT values was evaluated using VT estimated from truncated scan length normalized to VT estimated from 240 min of imaging data. Mean percent normalized VT values across scans (n = 8) are shown for representative brain regions.
