Table 6.
Scanning parameters for ABC@UofSC MRI sequences.
| Functional Scans | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Scan Type | Seq. | TR | TE | FA | FOV | VS | Vol | SL | ST | Gap | Order | Taska |
| Resting-state | EPI | 1650 | 35 | 72 | 216 × 216 × 120 | 2.4 × 2.4 × 2.0 | 427 | 50 | 2 | 20 | Interleaved, Ascending | Rest with eyes closed |
| Auditory Listening | EPI | 953 | 26.2 | 44 | 215 × 215 × 135 | 3.0 × 3.0 × 3.0 | 452 | 45 | 3 | 0 | Interleaved, Ascending | Listen to passages; Foreign/English. |
| Word/Picture Viewing | EPI | 953 | 26.2 | 44 | 215 × 215 × 135 | 3.0 × 3.0 × 3.0 | 452 | 45 | 3 | 0 | Interleaved, Ascending | Rate familiarity of words and pictures. |
| Structural Scans | |||||||
|---|---|---|---|---|---|---|---|
| Scan Type | Seq. | TR | TE | FA | FOV | VS | Other |
| T1-weighted | MGH multiecho MPRAGE | 2530 | {1.44,2.9,4.36,5.82,7.28} | 8 | 256 × 256 × 192 | 1 × 1 × 1 | GRAPPA = 2, TI = 1100 ms |
| T2-weighted | Siemens T2 Flair | 5000 | 387 | Var. | 230 × 230 × 173 | 0.9 × 0.9 × 0.9 | GRAPPA = 2, TI = 1800 ms |
| Diffusion Weighted (DWI) | Siemens DWI | 4500 | 103 | 90 | 220 × 220 × 128 | 2.2 × 2.2 × 2.2 | 137 dir., Monopolar, slices = 58, averages = 1, Diffusion Values = 2 {0 s/mm2, 2000 s/mm2) |
| DWI phase reversed (DWI rev) | Siemens DWI | 4500 | 103 | 90 | 220 × 220 × 128 | 2.2 × 2.2 × 2.2 | ∗Identical to above, but acquired P ≪ A |
| Arterial Spin Labeled (ASL) | Oxford 6-PLD PCASL | 5000 | 14 | 90 | 208 × 218 × 167 | 3.4 × 3.4 × 4.5 | |
| Resting-state fMRI Scan | EPI | 1650 | 35 | 72 | 215 × 215 × 128 | 2.4 × 2.4 × 2.0 | 427 vol, Ascending Interleaved, Eyes Closed |
Notes: TR = repetition time (ms); TE = echo time (ms); TI = inversion time (ms); ST = Slice Thickness (mm); FOV = field of view (mm); Seq = Sequence Name; FA = Flip Angle (Degrees); VS = Voxel Size (mm); Vols = Number of Volumes; SL = Slices (N); EPI = T2∗-weighted gradient echo echo planar image; PE-GRE = phase-encoded gradient echo;PCASL = pseudo-continuous arterial spin labelling; NIH = National Institutes of Health; MGH = Massachusetts General Hospital; MPRAGE = magnetisation prepared gradient echo. aTask: see text for details.