Table 1 Technical parameters for MR imaging pulse sequences.
T1w | T2w | pcASL | SWI | |
|---|---|---|---|---|
Sequence | 3D FSPGR | 3D CUBE | Multi-shot 3D fast spin-echo | 3D spoiled GRE flow-compensated |
Acquisition plane | Coronal | Sagittal | Axial | Axial |
Phase-encoding direction | Left-Right | Posterior-Anterior | Posterior-Anterior | Left-Right |
TR (ms) | 7.74 | 2300 | 4680 | 30.9 |
TE (ms) | 2.97 | 66.29 | 10.55 | 5 echoes; first echo: 5; echo spacing: 5.24 |
Flip angle | 12° | 90° | 111° | 20° |
FOV (cm) | 20 | 20 | 24 | 25 |
Acquisition matrix | 512 × 512 | 256 × 256 | 128 × 1 28 | 256 × 256 |
In-plane resolution (mm) | 0.39 × 0.39 | 0.78 ×0.78 | 1.875 × 1.875 | 0.977 × 0.977 |
Slice thickness (mm) | 1 | 1 | 4 | 2, reconstructed to 1 with zero filling (ZIP2) |
Number of slices | 126 | 106 | 50 | 92 |
Additional parameters | n/a | n/a | 1450 ms label period; 2025 ms pulse label; 24 control-label pairs | n/a |
Scan duration | 4 min 39 s | 5 min 1 s | 5 min 26 s | 5 min 29 s |
