Table 1.
Imaging pulse sequences and parameters. For in-vivo acquisition, a flow compensated 3D GRE sequence was used to generate data for QSM and a Multi-Echo 3D GRE sequence for T2* mapping data. A Multi-Echo 3D GRE acquisition was used to collect ex-vivo QSM and T2* mapping data. Abbreviations: NE: Number of echoes, NSA: Number of signal averages.
| Parameter ∖ Pulse seq. | In-vivo (QSM): Flow compensated 3D GRE | In-vivo (T2*): 3D multi-echo GRE | Ex-vivo (QSM/T2*): 3D multi-echo GRE |
|---|---|---|---|
| TR (ms) | 250 | 250 | 200 |
| minTE/ΔTE/maxTE (ms) | 15 | 2.31/2.46/29.32 | 3.05/3.92/46.21 |
| FA (0) | 32 | 32 | 36 |
| NE | 1 | 12 | 12 |
| NSA | 1 | 1 | 5 |
| Scan time | 1hr,2s | 1hr,2s | 10hr,45min,2s |
| Spectral width (Hz) | 50000 | 100000 | 73529 |
| FOV (mm) | 18 × 18 × 18 | 18 × 18 × 18 | 18 × 17.2 × 14.4 |
| Matrix | 120 × 120 × 120 | 120 × 120 × 120 | 225 × 215 × 180 |
| Resolution (μm) | 150 × 150 × 150 | 150 × 150 × 150 | 80 × 80 × 80 |