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.
PET: positron emission tomography, MRI: magnetic resonance imaging, MPRAGE: magnetization prepared rapid gradient echo, navPPA: nonfluent/agrammatic variant primary progressive aphasia.
