Table 3.
MRF protocols used for 3T.
| Examination Parameters |
2D ax T2 FLAIR | 2D T2 ax | 3D T1 Sag | 2D Multi-Echo Spin Echo |
MRF |
|---|---|---|---|---|---|
| TSE + IR | TSE | MP2RAGE (T1 map) |
(T2 map) | ||
| Voxel dimensions [mm2] | 0.6 × 0.6 | 0.7 × 0.7 | 1.0 × 1.0 | 0.7 × 0.7 | 1.0 × 1.0 |
| Matrix size | 384 × 276 | 320 × 240 | 256 × 216 | 320 × 257 | 256 × 256 |
| No. slices | 10 | 23 | 160 | 10 | 10–13 |
| Field of view [mm2] | 230 × 166 | 230 × 170 | 256 × 216 | 230 × 180 | 256 × 256 |
| Slice thickness [mm] | 5.0 | 5.0 | 1.0 | 5.0 | 5.0 |
| TE [ms] | 126 | 118 | 2.98 | 12.6, 25.2, … 201.6 | 2.0 |
| TI [ms] | 2500 | – | 700, 2500 | – | 21.0 |
| TR [ms] | 8500 | 4890 | 5000 | 2100 | 12.14–15.00 (varied by sequence) |
| TA [min:sec] | 3:43 | 1:25 | 8:02 | 3:38 | 3:51–4:51 |
| Acceleration factor | 1 (turbo factor: 19) | 2 | 2 | 3 | 24 (inner k-space), 48 (outer k-space) |
| BW/pixel [Hz/pixel] | 140 | 130 | 240 | 150 | RX-Bandwidth: 400 kHz |
| FA [°] | 180 | 180 | 4, 5 | 180 | 0–74 (varied by sequence) |
| Fat saturation | Yes | – | No | No | no |
FLAIR fluid-attenuated inversion recovery; TSE, turbo spin echo; MP2RAGE, magnetization prepared 2 rapid acquisition gradient echoes; MRF, Magnetic Resonance Fingerprinting.