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. 2024 May 31;6(3):fcae189. doi: 10.1093/braincomms/fcae189

Table 1.

MRI acquisition parameters in the PREVENT dementia programme

TR (ms) TE (ms) Flip angle Voxel size (mm3) Slices Duration (min:s) Additional comments
T1-weighted 2300 2.98 1.0 × 1.0 × 1.0 160 5:03 MPRAGE
T2-weighted 1500 80 150° 0.69 × 0.69 × 4.0 32 0:50
FLAIR 9000 94 150° 0.43 × 0.43 × 4.0 27 4:50
SWI 28 20 15° 0.72 × 0.72 × 1.2 72 5:05
ASL 2500 11 90° 3.0 × 3.0 × 3.0 14 4:20 PICORE; 50 averages
Two variants differing in bolus duration (700 and 1675 ms)
DTI 11 700 90 90° 2.0 × 2.0 × 2.0 63 13:16 1 b = 0; 1000 s/mm2 volume, and 64 gradient directions
MRS 2000 30, 33 and 40 90° 20 × 20 × 20 Single voxel 3:52 PRESS with and without water suppression (96 and 16 averages, respectively)
BOLD fMRI 2000 30 80° 3.0 × 3.0 × 3.0 35 11:06 Resting state: 330 repetitions
6:22 Task1: 188
8:26 Task2: 250
Coronal hippocampal T2-weighted 6420 11 160° 0.41 × 0.41 × 2.0 20 6:20

ASL, arterial spin labelling; BOLD, blood oxygen level dependent; DTI, diffusion tensor imaging; fMRI, functional MRI; MRS, magnetic resonance spectroscopy; TR, repetition time; TE, echo time; FLAIR, fluid-attenuated inversion recovery; SWI, susceptibility-weighted imaging.