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.
Relative enhancement patterns of early and late phases. Elevated pattern: the interval enhancement increased more than 10%. Steady pattern: the interval enhancement changed within 10%. Depressed pattern: the interval enhancement decreased more than 10%.
