Table 2.
Image acquisition parameters for participants imaged using standardized research image acquisition protocols
| Scanner Manufacturer | Model | Field Strength | Number of Subjects | Acquisition | Repetition Time (ms) | Echo Time (ms) | Inversion Time (ms) | Flip Angle (°) |
|---|---|---|---|---|---|---|---|---|
| Siemens | Allegra | 3T | 19 | MPRAGE | 2500 | 3.93 | 900 | 8 |
| Philips | Achieva | 3T | 3 | TFE | 2500 | 3.03 | 900 | 8 |
| Siemens | TrioTrim | 3T | 1 | MPRAGE | 2500 | 3.03 | 900 | 8 |
| GE | Discovery MR750 |
3T | 1 | FSPGR | 8.152 | 3.17 | n/a | 11 |
| Philips | Achieva | 3T | 4 | TFE | 8.073 | 3.68 | n/a | 6 |
| Philips | Ingenia | 3T | 1 | TFE | 2550 | 74.71 | n/a | 90 |
| Philips | Ingenia | 3T | 1 | TFE | 4800 | 298.69 | n/a | 90 |
| Siemens | Verio | 3T | 1 | MPRAGE | 2500 | 2.99 | 900 | 8 |
n/a = not applicable; MPRAGE = magnetization prepared rapid gradient echo; TFE = turbo field echo; FSPGR = fast spoiled gradient echo; GE = General Electric.