Fig. 9 .
Exhibits TI versus the concentration of the contrast; a concentration which leads to a minimum SI will be decreased when TI is increased; the concentration vanishes to zero at higher TI (more than 1200 ms).
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.