Table 1. Details of MRI systems.
| Signa HDxT | Discovery MR 750 | Achieva | Achieva dStream | Ingenia | |
|---|---|---|---|---|---|
| Number of patients | 7 | 6 | 3 | 1 | 1 |
| Tesla | 1.5 | 3.0 | 1.5 | 1.5 | 3.0 |
| 3DT1 | |||||
| FOV (mm×mm) | 240 × 240 | 220 × 220 to 256 × 256 | 230 × 230 | 240 × 240 | 240 × 240 |
| Number of sections | 248 | 178 to 248 | 127 to 128 | 256 | 260 |
| Section thickness (mm) | 1.4 | 1.0 to 1.4 | 1.5 | 1.4 | 1.4 |
| TR (ms) | 7 | 7 to 8 | 22 | 22 | 8 |
| TE (ms) | 2.9 to 3.0 | 3.0 to 3.3 | 4.6 | 4.6 | 4 |
| TI (ms) | 0 to 420 | 420 | NA | NA | NA |
| Number of signals acquired | 0.9921 to 1 | 0.5 to 1 | 1 | 1 | 1 |
| Echo train length | 1 | 1 | 1 | 1 | 240 |
| FA | 15° | 15° | 25° | 25° | 8° |
| FLAIR | |||||
| FOV (mm×mm) | 220 × 220 | 220 × 220 | 220 × 220 | 220 × 220 | 220 × 220 |
| Number of sections | 32 | 32 | 32 | 32 | 32 |
| Section thickness (mm) | 4 | 4 | 4 | 4 | 4 |
| TR (ms) | 10000 to 10002 | 10000 | 11000 | 11000 | 10000 |
| TE (ms) | 120.2 to 128.6 | 131.2 to 131.8 | 120 | 120 | 120 |
| TI (ms) | 2400 | 2336.49 to 2500 | 2800 | NA | 2700 |
| Number of signals acquired | 1 | 1 | 2 | 1 | 1 |
| Echo train length | 1 | 1 | 38 | 38 | 28 |
| FA | 90° | 90° to 111° | 90° | 90° | 90° |
3DT1weighted three-dimensional images; FA: flip angle; FLAIR: fluid attenuated inversion recovery; FOV: field of view; NA: not acquired; TR: repetition time; TE: echo time; TI: inversion time.