Table 1.
Technical parameters of the T1-weighted magnetic resonance imaging (MRI) sequences
| Parameters | Incoherent GRE | Volume interpolated GRE | UTE |
|---|---|---|---|
|
Repetition time (TR) in ms |
207.00 | 3.22 | 1.10 |
|
Echo time (TE) in ms |
2.24 | 1.06 | 0.08 |
| Flip angle in ° | 90 | 10 | 6 |
| Acquisition matrix | 320 | 320 | 240 |
| Field of view in mm | 350 | 350 | 280 |
| Spatial resolution in mm3 | 1.50 × 1.10 × 4.00 | 1.20 × 1.10 × 4.00 | 1.17 × 1.17 × 1.17 |
| Slice orientation | Axial | Axial | Axial |
| Fat saturation | Yes | Yes | Yes |
| Breath-hold | Yes; acquisition by using four concatenations | Yes, acquisition within one breath-hold | No, acquired during free-breathing with two signal averages |
| Acquisition time | 1.02 min | 18.0 s | 6.20 min |
GRE, gradient echo; UTE, ultrashort echo time