Prospective ECG-gating CCTA
1. Use a signal, usually derived from the R-wave of the patient's ECG, to trigger image acquisition
2. A delay between the R-wave and scan initiation can be selected by the technologist
3. Using this trigger, and the preprogrammed delay, a scan is acquired during a finite portion of R-R interval
4. The table is then move to the next position, and the procedure is repeated until the entire area of interest is covered