Table 1.
Acquisition parameters for the ASL scan and the T2-weighted anatomical reference scan (used for cortical segmentation in the volunteers).
| Parameter | Pseudo-continuous arterial spin labeling scan | T2-weighted scan |
|---|---|---|
| Scan technique | Echo-planar-imaging | Turbo-spin-echo |
| TR/TE (ms) | 2616/13 | 1858/80 (3524/110 at 1.5T) |
| EPI/TSE factor | 39 (33 at 1.5T) | 19 (23 at 1.5T) |
| In-plane voxel size (mm) | 3.6 × 3.5 | 2.7 × 2.7 |
| SENSE factor | 2 | – |
| Slice thickness (mm)/number of slices | 5/16 | 5/16 |
| Field-of-view (mm) | 240 × 240 × 95 | 240 × 240 × 95 |
| Readout flip angle | 90° | 90° |
| Labeling duration/post labeling delay (ms) | 1800/1800 | – |
| Number of label and control pairs (3T/1.5T Rad/1.5T OR) |
20/30/40 | – |