TABLE 2.
Numbers of series passing QC by series type for the ADNI 1, ADNI 2/GO, and ADNI 3 cycles.
| Sequence type | ADNI 1 | ADNI 2/GO | ADNI 3 | Total passed QC |
|---|---|---|---|---|
| 3DT1w | 6053/6245 (97%) | 8415/8551 (98%) | 2673/2729 (98%) | 17141/17525 (98%) |
| PD/T2 | 3140/3269 (96%) | X | X | 3140/3269 (96%) |
| FLAIR | X | 4301/4407 (98%) | 2377/2470 (96%) | 6678/6877 (97%) |
| T2*GRE | X | 4208/4302 (98%) | 2415/2450 (99%) | 6623/6752 (98%) |
| dMRI | X | 1023/1093 (94%) | 2214/2376 (93%) | 3237/3469 (93%) |
| ASL | X | 1385/1566 (88%) | 1461/1837 (80%) | 2846/3403 (84%) |
| HighResHippo | X | 556/815 (68%) | 2412/2518 (96%) | 2968/3333 (89%) |
| TF‐fMRI | X | 805/861 (93%) | 2056/2353 (87%) | 2861/3214 (89%) |
Note: Each cell shows the number of that series type in that ADNI cycle that passed QC/total number received (%). 3D T1s in ADNI 1 were at 1.5T and were at 3T for ADNI 2/GO and ADNI 3. Dual echo proton density/T2 (PD/T2) were acquired only in ADNI 1. FLAIR and GRE were not acquired in ADNI 1. dMRI, ASL, TF‐fMRI, and the high‐resolution hippocampal imaging series (HighResHipp) were each acquired on only one MR vendor in ADNI 2/GO but on all vendors in ADNI 3.