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.
Contrast to noise ratio that was obtained to quantify low-contrast resolution according to an increase in the percentage of ASIR. The reference line indicates a value of 1.63, which was defined as the lowest acceptable limit. ASIR, adaptive statistical iterative reconstruction.
