Table 1.
Pulse sequence parameters used in the study
| Dataset | Protocol name | Protocol type | TR (ms) | TE (ms) | Flip angle | No. Slices | Scan time (sec) | in-plane resolution (mm2) | Phase encoding direction | Slice thickness (mm) | Slice gap (mm) | FCa | SBD |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Initial comparing T1-weighted protocols |
A |
FLASH |
25 |
4.6 |
30 |
160 |
408 |
1.0x1.0 |
Right-left |
2.0 |
−1 |
- |
- |
| |
B |
MPRAGE |
9.8 |
4.6 |
8 |
120 |
279 |
1.16x1.1 |
Right-left |
1.2 |
0 |
- |
- |
| |
C |
MPRAGE |
7.6 |
3.5 |
8 |
160 |
614 |
1.0x1.0 |
Anterior-posterior |
1.0 |
0 |
- |
- |
| |
D |
MPRAGE |
7.6 |
3.5 |
8 |
160 |
614 |
1.0x1.0 |
Anterior-posterior |
1.05 |
0 |
- |
- |
| |
E |
MPRAGE |
9.8 |
4.6 |
8 |
120 |
279 |
1.16x1.1 |
Right-left |
1.2 |
0 |
- |
- |
| |
F |
MPRAGE |
7.1 |
3.3 |
8 |
145 |
557 |
1.0x1.0 |
Anterior-posterior |
1.1 |
0 |
- |
- |
| Optimizing T1-weighted protocols |
F |
MPRAGE |
7.1 |
3.3 |
8 |
145 |
557 |
1.0x1.0 |
Anterior-posterior |
1.1 |
0 |
- |
- |
| |
F1 |
MPRAGE |
7.1 |
3.3 |
8 |
145 |
557 |
1.0x1.0 |
Anterior-posterior |
1.1 |
0 |
- |
✓ |
| |
F2 |
MPRAGE |
7.1 |
3.3 |
8 |
145 |
557 |
1.0x1.0 |
Right-left |
1.1 |
0 |
- |
- |
| |
F3 |
MPRAGE |
7.1 |
3.3 |
8 |
145 |
557 |
1.0x1.0 |
Right-left |
1.1 |
0 |
- |
✓ |
| |
C1 |
MPRAGE |
9.5 |
5.3 |
8 |
160 |
614 |
1.0x1.0 |
Anterior-posterior |
1.0 |
0 |
✓ |
- |
| |
C2 |
MPRAGE |
7.6 |
3.5 |
8 |
160 |
614 |
1.0x1.0 |
Anterior-posterior |
1.0 |
0 |
- |
✓ |
| C3 | MPRAGE | 10 | 5.6 | 8 | 160 | 614 | 1.0x1.0 | Right-left | 1.0 | 0 | ✓ | - |
FCa: Flow Compensation, manufacturer's default settings.
SBD: Saturation band, manufacturer's default settings.