Table 1.
MRI scanning parameters and features of the current NHP-HCP protocol in comparison with open macaque database (PRIME-DE) and Young Adult HCP protocols.
| NHP-HCP Protocol | Open Macaque Database (PRIME-DE) | HCP protocol Young Adult | |
|---|---|---|---|
| MRI scanner | |||
| Magnetic field strength (T) | 3 | 3– 7 | 3 |
| Gradient performance (mT/m) | 80 | 40-80 | 100 |
| RF coil | |||
| Number of channels | 24* | 4-8 | 32 |
| Structural MRI | |||
| Spatial resolution (mm) | 0.5 | 0.3 – 0.5 | 0.7 |
| T1w | Yes | Yes | Yes |
| T2w | Yes* | No, Yes | Yes |
| Functional MRI | |||
| Spatial resolution (mm) | 1.25* | 1.4 – 1.65 at 3T 1.2 at 7T |
2 |
| Repetition time (s) | 0.76* | 1.6 – 2.0 at 3T 1.0 at 7T |
0.72 |
| Echo-time (ms) | 30 | 16-30 | 33 |
| Spin-echo fieldmap | Yes* | No | Yes |
| Gradient-echo fieldmap | No | No, Yes | No |
| In-plane acceleration | 1 | NA | 1 |
| Cross-plane acceleration (multiband factor) | 5* | 1 or NA | 8 |
| Total scan time for resting-state fMRI (min/subject) | 102* | 13-476 (median = 41) | 58 |
| Total number of volumes for resting-state fMRI (volumes/subject) | 8192* | 500-13824 (median 1712) | 4800 |
| Diffusion MRI | |||
| Spatial resolution (mm) | 0.9* | 1-1.4 at 3T 1.2 at 7T |
1.2 |
| Repetition time (s) | 3.4 | 6.3 – 11.0 at 3T 3.8 at 7T |
5.5 |
| Echo-time (ms) | 73 | 83-107 at 3T 54 at 7T |
90 |
| Number of b-shells | 3* | 1-3 | 3 |
| b-value (mm2/s) | 1000-2000-3000* | 1000, 1600, 1250-2500 850-1650-2500 at 3T, 1500 at 7T | 1000-2000-3000 |
| Number of diffusion gradient direction | 500* | 60, 80, 100, 120, 270 | 270 |
| Opposing-phase encoding acquisition | Yes | No, Yes | Yes |
| In-plane acceleration | 2 | NA | 1 |
*
Imaging parameters that are important in the NHP-HCP protocol (left column). Note that these were not often applied in PRIME-DE database (middle column). For reference, the young adult HCP imaging parameters are shown in the right column. NA: not available.