Fig. 1
From: Three-dimensional free breathing whole heart cardiovascular magnetic resonance T1 mapping at 3 T
Pulse sequence diagram for the proposed free-breathing 3D T1 mapping sequence. Three electrocardiogram (ECG) triggered differently T1-weighted volumes (IMG1, IMG2 and IMG3) were acquired in an interleaved fashion. The magnetization for IMG1 and IMG2 was prepared by a saturation (SAT) pulse with different delay time (TSAT1 and TSAT2). n heartbeats (HBs) were skipped before the equilibrium volume (IMG3) was acquired, where n was calculated using Eq. A1 to achieve a T1 recovery time ≥ 6 s. Respiratory navigator (NAV) gating and fat suppression (FS) were employed. For IMG3, after the prescribed n HBs, the readout will be performed only if the respiratory navigator is within the acceptance window