Table 3. Sequence parameters of resting state fMRI datasets at each data collection included in the primary ABIDE II.
| Collection | FA | TE | TR | BW | PA | PF | PE | FS | SO | SA | Gap |
Recon resolution (mm)
|
Recon image Matrix (px)
|
Nacq | Ndisc | TA | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Label | ° | ms | ms | Hz/Px | % | RO | PE | SL | RO | PH | SL | min:sec | ||||||||
| All data were collected with echo planar imaging (EPI) sequences. BW, bandwidth per pixel; Dims, dimensions; FA, flip angle; FS, fat suppression; Gap, gap between slices; Nacq, number of volumes collected; Ndisc, number of initial volumes discarded by the scanner; PA, parallel acquisition; PE, Phase encoding; PF, Partial Fourier (half scan); SA, slice acquisition order; SO, slice orientation; TA, acquisition time; TE, echo time; TR, repetition time. For parallel acquisition the acceleration technology and dimension are listed followed by the acceleration factor, AP, ASSET acceleration in the phase encoding direction; GP, GRAPPA acceleration in the phase encoding direction; MB, multi-band imaging; SP, SENSE acceleration in the phase encoding direction. For partial Fourier, the under-sampled dimension is listed with the under sampling factor, P, phase encoding. For slice orientation; T, transverse (axial), and TO, transverse oblique. For phase encoding direction; RL, right-to-left; AP, Anterior to posterior. For slice acquisition order; A, ascending; D, descending; IA, interleaved ascending and ID, interleaved descending. Reconstructed resolution and image dimensions refer to the images after they have been reconstructed from the k-space data, the matrix size and resolution used for the acquisition may differ. For these categories, RO, read out direction; PE, phase encoding direction, and SL, slice direction. |
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| ABIDEII-BNI_1 | 80 | 25 | 3,000 | 3,280 | SP2 | — | AP | N | T | A | 0 | 3.75 | 3.75 | 4.00 | 64 | 64 | 50 | 120 | 0 | 6:09 |
| ABIDEII-EMC_1 | 85 | 30 | 2,000 | 7,812 | — | — | AP | T | ID | 0 | 3.59 | 3.59 | 4.00 | 64 | 64 | 37 | 160 | 5:20 | ||
| ABIDEII-ETH_1 | 90 | 25 | 2,000 | 1,590 | SP2.5 | — | AP | Y | T | D | 10 | 3.00 | 3.00 | 3.30 | 80 | 80 | 40 | 210 | 0 | 7:06 |
| ABIDEII-GU_1 | 90 | 30 | 2,000 | 2,442 | GP2 | — | AP | N | T | IA | 20 | 3.00 | 3.00 | 3.00 | 64 | 64 | 43 | 154* | 2 | 5:14 |
| ABIDEII-IU_1 | 60 | 28 | 813 | 2,604 | MB3 | — | AP | Y | TO | IA | 0 | 3.44 | 3.44 | 3.40 | 64 | 64 | 42 | 433 | 2 | 6:00 |
| ABIDEII-IP_1 | 90 | 45 | 2,700 | 2,213 | — | — | AP | Y | T | A | 0 | 3.60 | 3.70 | 4.00 | 64 | 64 | 32 | 85 | 2 | 7:55 |
| ABIDEII-KKI_1 † | 75 | 30 | 2,500 | 2,697 | SP3 | — | AP | Y | T | A | 0 | 3.00 | 3.00 | 3.00 | 96 | 96 | 47 | 156 | 2 | 6:40 |
| ABIDEII-KUL_3 | 90 | 30 | 2,500 | 2,188 | SP2 | — | AP | Y | T | A | 14.8 | 1.56 | 1.56 | 3.10 | 128 | 128 | 45 | 162 | 4 | 7:00 |
| ABIDEII-NYU_1 | 90 | 15 | 2,000 | 3,906 | — | — | RL | Y | TO | IA | 0 | 3.00 | 3.00 | 4.00 | 80 | 64 | 33 | 180 | 2 | 6:00 |
| ABIDEII-NYU_2 | 82 | 30 | 2,000 | 3,906 | — | — | RL | Y | T | IA | 0 | 3.00 | 3.00 | 3.00 | 80 | 64 | 34 | 180 | 2 | 6:00 |
| ABIDEII-OHSU_1 | 90 | 30 | 2,500 | 2,298 | — | — | AP | Y | TO | IA | 0 | 3.75 | 3.75 | 3.80 | 64 | 64 | 36 | 120 | 2 | 5:07 |
| ABIDEII-ONRC_2 | 60 | 30 | 475 | 2,604 | MB8 | — | AP | Y | T | IA | 0 | 3.00 | 3.00 | 3.00 | 80 | 80 | 48 | 947 | 2 | 7:37 |
| ABIDEII-SDSU_1 | 90 | 30 | 2,000 | 7,813 | A | — | AP | N | T | IA | 0 | 3.44 | 3.44 | 3.40 | 64 | 64 | 42 | 180 | 5 | 6:10 |
| ABIDEII-TCD_1 | 90 | 27 | 2,000 | 2,420 | — | — | AP | Y | T | A | 10.94 | 3.00 | 3.00 | 3.20 | 80 | 80 | 37 | 210 | 0 | 7:06 |
| ABIDEII-UCD_1 ‡ | 90 | 24 | 2,000 | 2,232 | — | — | AP | Y | TO | IA | 0 | 3.50 | 3.50 | 3.50 | 64 | 64 | 36 | 151 | 2 | 5:06 |
| ABIDEII-UCLA_1 | 90 | 28 | 3,000 | 2,442 | — | — | AP | Y | TO | IA | 0 | 3.00 | 3.00 | 4.00 | 64 | 64 | 34 | 120 | 2 | 6:06 |
| ABIDEII-USM_1 | 90 | 28 | 2,000 | 2,894 | GP2 | — | AP | Y | TO | IA | 10 | 3.40 | 3.40 | 3.00 | 64 | 64 | 40 | 240 | 2 | 8:06 |
| ABIDEII-UCLA_Long | 90 | 28 | 3,000 | 2,442 | — | — | AP | Y | TO | IA | 0 | 3.00 | 3.00 | 4.00 | 64 | 64 | 34 | 120 | 2 | 6:06 |
| ABIDEII-UPSM_Long | 70 | 25 | 1,500 | 3,126 | — | — | AP | Y | TO | IA | 0 | 3.13 | 3.13 | 4.00 | 64 | 64 | 29 | 200 | 2 | 5:06 |
*GU discarded the first 2 scans in addition to the 2 discarded by the sequence resulting in 152 volumes.
† For the KKI_1 collection, an 8-channel head coil was used for n=149 datasets and a 32-channel head coil was used for n=62 datasets—see Table 1.
‡ One R-fMRI datasets was collected with different EPI sequence with voxel size 3.5×3.5×4—specifics are provided in the ABIDE II website (http://fcon_1000.projects.nitrc.org/indi/abide/).