MRI Scanner | |
 Brazil | Philips Achieva 3.0 T |
 India | Philips Ingenia 3.0 T CX |
 Netherlands | GE 3.0 T Discovery MR750 |
 South Africa | Siemens MAGNETOM Skyra 3.0 T |
 U.S. | GE 3.0 T SIGNA Premier |
Head coil | 32-channel or 48-channel# |
MRI Sequences | |
 Structural T1 | 3D sagittal T1-weighted MP-RAGE according to ADNI-3 protocol (1 × 1 × 1 mm resolution) |
 rs-fMRI | T2*-weighted echo-planar images while subjects are awake and keep their eyes closed (10 min, TR = 2200 ms, TE = 28 ms, 3.3 × 3.3 mm in-plane resolution, 3 mm slices with 0.3 mm gap) |
 DWI | multi-shell single spin echo DWI (80 interleaved volumes: 7 b0, 25 b1000, 24 b2000, 24 b3000, 2.5 × 2.5 × 2.5 mm) |
 PSIR | T1-weighted image with improved SNR and gray-white matter contrast (1 × 1 × 1 mm resolution) |