Table 1.
MR scan parameters
| T1WI* | T2WI | FLAIR | MPRAGE** | |
|---|---|---|---|---|
| Sequence | 2D FSE | 2D FSE | 2D FSE | 3D FFE |
| TR (ms) | 2050 | 4000 | 10000 | 10.3 |
| TE (ms) | 15 | 92 | 136 | 3.4 |
| TI (ms) | - | 2700 | 900 | |
| Echo train lengths | 6 | 13 | 29 | - |
| Echo space (ms) | 7.5 | 11.5 | 8.5 | - |
| Flip angle (°) | 90/140 | 90/180 | 90/150 | 13 |
| Matrix | 320 × 320 | 512 × 512 | 256 × 256 | 384 × 384 |
| FOV (mm) | 200 × 200 | 200 × 200 | 200 × 200 | 200 × 200 |
| Thick/gap (mm) | 2.5/2.5 | 2.5/2.5 | 2.5/2.5 | 1/0 |
| No. of slices | 10 | 10 | 10 | 30 |
| Bandwidth (Hz) | 325.5 | 195.3 | 244.1 | 177.5 |
| Parallel imaging factor: (SPEEDER) | 2 | 2 | 1.5 | 1.6 |
| (NAQ)# | 1 | 1, 2, 5 | 1, 2, 5 | 1, 2, 5 |
| Total scan time (s)# | ||||
| NAQ2# | 164 | 130 | 122 | |
| NAQ5# | 404 | 310 | 204 |
*
T1WI was used in the experimental study.
**
MPRAGE was used in the clinical study.
#
NAQ1 images were used for the experimental study to generate the ground-truth images. NAQ2 and NAQ5 images were acquired in the clinical study. FLAIR, fluid-attenuated inversion recovery; NAQ, number of image acquisition.