CMR parameter | Conventional LGE | 3D HR-LGE |
---|---|---|
Base sequence | Single-shot PSIR-bSSFP | 3D IR-FLASH |
ECG gating | Mid-late diastole | Cardiac quiescence in systole or diastole |
Parallel imaging × acceleration factor | GRAPPA × 2 | GRAPPA × 2 |
Field of view | 250–350 mm | 250–350 mm |
Pixel size | 1.8 × 1.8 mm | 1.1 × 1.1 to 1.4 × 1.4 mm |
Slice thickness | 6 mm (no gap) | 1.1 to 1.4 mm |
Flip angle | 40˚ | 18˚ |
TR/TE | 2.57/1.09 ms | 330/1.4 ms |
Number of averages | 1–3a | 1 |
Fat saturation | Yes | Yes |
Acquisition plane(s) | Axial, short axis | Coronal |