Table 1:
Acquisition Parameters for the Imaging Protocol, Including T1-weighted, T2-weighted, Kidney MRF, DWI, and ASL MRI
| Parameter | T1-weighted | T2-weighted | MRF | DWI* | ASL |
|---|---|---|---|---|---|
| Acquisition sequence | Gradient echo | HASTE | FISP | Multishot EPI | Gradient echo |
| Field of view (mm) | 400 × 400 | 400 × 400 | 400 × 400 | 240 × 240 | 320 × 160 |
| Matrix size | 300 × 300 | 300 × 300 | 256 × 256 | 160 × 160 | 64 × 32 |
| Spatial resolution (mm) | 1.3 × 1.3 | 1.3 × 1.3 | 1.6 × 1.6 | 1.5 × 1.5 | 5.0 × 5.0 |
| Section thickness (mm) | 3 | 5 | 5 | 4 | 5 |
| Repetition time (msec) | 9.0 | 1050 | 5.7 | 2400 | 5000 |
| Echo time (msec) | 1.1 | 82 | 1 | 55/91 | 19.2 |
| Flip angle (degrees) | 4 | … | 5–12 | … | … |
| Duration (min) | 0.25 | 0.32 | 0.25 per section | … | 5.3 |
Note.—ASL = arterial spin labeling, DWI = diffusion-weighted imaging, EPI = echo-planar imaging, FISP = fast imaging with steady-state free precession, HASTE = half-Fourier acquisition single-shot turbo spin echo, MRF = MR fingerprinting.
*
Two b values (0 and 400 sec/mm2) were applied with 12 diffusion directions.