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.
Evolution of dynamic ASL signals in a numerical phantom illustrating the underlying assumptions of this work. The signal from an individual pixel is temporally slowly varying. The dynamic signals in different pixels (blue and red) follow the same nonlinear perfusion model with different parameter values.
