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.
The optimal scan time depends on the Ktrans value for the Patlak model, as long scan times and high Ktrans will lead to significant backflux and poor results. Scanning longer than 15 minutes is only beneficial for the very lowest Ktrans values, and longer than 5 minutes leads to sharp drops in the K-CNR of Ktrans > 10*10−3/min.
