Table 1 Imaging protocols
From: Free-breathing myocardial T2* mapping using GRE-EPI and automatic Non-rigid motion correction
| Â | Breath-hold Segmented MGRE | Free-breathing GRE-EPI | |
|---|---|---|---|
OSU | RBH | OSU and RBH | |
Acquisition Matrix | 160 × 90 | 256 × 84 | 192 × 86 |
Slice thickness (mm) | 10 | 10 | 10 |
Flip angle (degree) | 18 | 20 | 10 |
TEs (ms) | 1.9, 3.5, 5.1, 6.7, 8.3, 9.9, 11.5, 13.1 | 1.6, 3.8, 6, 8.3, 10.5, 12.7, 14.9, 17.2 | 1.9, 3, 5, 7, 9, 11, 14 |
TR (ms) | 15 | 20 | 19.2 |
Bandwidth (Hz/Pixel) | 814 | 814 | 1860 |
ETL | 1 | 1 | 5 |
Segments | 7 | 9 | 10 |
Acquisition window | 105 | 180 | 192 |
Parallel acceleration | None | GRAPPA rate 2 with integrated reference lines | |
ECG triggering (heart beat) | 1 | 1 | 2 |
Measurements | 1 | 1 | 4 |
Total acquisition (heart beats) | 13 | 10 | 64 |