Table 1.
Scan protocols, Siemens MAGNETOM Avanto FIT 1.5 T and Siemens MAGNETOM FreeMax 0.55 T.
| Siemens MAGNETOM FreeMax 0.55 T | Siemens MAGNETOM Avanto Fit 1.5 T | |
|---|---|---|
| FLAIR (fluid attenuated inversion recovery) transversal | ||
| Field strength in T | 0.55 | 1.5 |
| FOV (field of view) in mm2 | 209 × 230 | 187 × 230 |
| ST (slice thickness) in mm | 3 | 3 |
| SS (slice spacing) | 3.6 | 3.6 |
| Number of slices | 40 | 40 |
| PS (pixel spacing) in mm2 | 1.28 × 1.03 | 0.9 × 0.9 |
| TR (repetition time) in msec | 7780 | 8510 |
| TE (echo time) in msec | 96 | 112 |
| TI (inversion delay) in msec | 2368.8 | 2460 |
| Turbo Factor | 15 | 19 |
| TA (time of acquisition) in min | 5:28 | 3:26 |
| BW (Bandwidth) | 150 | 130 |
| 3D SWI (susceptibility weighted imaging) transversal | ||
| Field strength in T | 0.55 | 1.5 |
| Sequence type | Multi shot 3D EPI | 3D FLASH |
| FOV (field of view) in mm2 | 201 × 230 | 194 × 230 |
| ST (slice thickness) in mm | 3 | 3 |
| Number of slices | 40 | 48 |
| PS (pixel spacing) in mm2 | 0.94 × 0.8 | 1.12 × 0.9 |
| TR (repetition time) in msec | 172 | 48 |
| TE (echo time) in msec | 100 | 40 |
| Parallel imaging | - | GRAPPA factor 2 |
| TA (time of acquisition) in min | 2:23 | 2:17 |
| BW (Bandwidth) | 276 | 80 |
| Single shot diffusion EPI (echo-planar imaging) transversal | ||
| Field strength in T | 0.55 | 1.5 |
| FOV (field of view) in mm2 | 220 × 220 | 230 × 230 |
| ST (slice thickness) in mm | 3 | 3 |
| SS (slice spacing) | 3.6 | 3.6 |
| Number of slices | 40 | 40 |
| PS (pixel spacing) in mm2 | 1.67 × 1.67 | 1.44 × 1.44 |
| b values in s/mm2 | 0, 1000 | 0, 1000 |
| TR (repetition time) in msec | 7400 | 6200 |
| TE (echo time) in msec | 102 | 103 |
| Parallel imaging | GRAPPA factor 2 | GRAPPA factor 2 |
| TA (time of acquisition) in min | 4:35 | 2:04 |
| BW (Bandwidth) | 842 | 1490 |