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.
Principle of prospectively triggered step-and-shoot cardiac CT. Top: Heart rate trend graph; Bottom: Patient ECG during step-and-shoot CT angiography acquisition. White segments denote the time periods with X-ray tube on. White vertical line: 75% of the R-R-Interval. Vertical lines with diamonds: ECG triggering points.
