Cardiac and respiratory gating/triggering

The following pulse sequences allow the use of Combined Cardiac and Respiratory Gating/Triggering: 3D Fast Gradient Echo, Fast Card, and FastCINE sequences.

If a valid ECG trigger is detected within the respiratory data acquisition window, scanning begins. When the end of the data acquisition window is reached, scanning stops. RF application is continuous, being applied at the TR time throughout the entire respiratory cycle, even when the data acquisition window is closed.

Table 1. Respiratory/Cardiac image legend

Number	Description
1	One respiratory cycle from 0-100%
2	Trigger Point of 30%
3	Time frame when cardiac gated slices are acquired
4	Trigger Window
5	Time frame when cardiac gated slices are acquired
6	Slices