Table 1.

T1-weighted structural imaging parameters across large imaging studies. Only reporting imaging sequences performed on 3T Siemens MRIs.

Study	Pulse sequence	Voxel size (mm)	Matrix Size	Num Slices	TI (ms)	TR (ms)	Bandwidth (Hz/Pz)	Parallel Imaging	Partial Fourier	Flip Angle (degrees)	Scanner
Rockland Sample	MPRAGE	1.0 × 1.0 × 1.0	256 × 256	176	900	1900	170	2	off	9	Tim-Trio
UK Biobank	MPRAGE	1.0 × 1.0 × 1.0	256 × 256	208	880	2000	240	2	off	8	Siemens 3T Skyra
ADN13	MPRAGE	1.0 × 1.0 × 1.0	256 × 240	176	900	2300	240	2	off	9	Many
WU-Minn HCP [a.k.a HCP-YA]	MPRAGE	0.7 × 0.7 × 0.7	320 × 320	256	1000	2400	210	2	off	8	Custom HCP Skyra
HCP Aging (HCP-A)	MPRAGE	0.8 × 0.8 × 0.8	320 × 300	208	1000	2500	220	2	off	8	Prisma
And Development (HCP-D)	MPRAGE+PMC	0.8 × 0.8 × 0.8	320 × 300	208	1000	2500	740	2	6/8 (slice partial Fourier) off for phase	8	Prisma
HCP Baby (BCP)*	MPRAGE	0.8 × 0.8 × 0.8	320 × 320	208	1060	2400	–	–	–	8	Prisma
ABCD	MPRAGE+PMC	1.0 × 1.0 × 1.0	256 × 256	176	1060	2500	240	2	off	8	Prisma
Healthy Brain Network (HBN) **	MPRAGE ***	0.8 × 0.8 × 0.8	320 × 320	224	1060	2500	130	2	7/8 (slice partial Fourier) off for phase	8	Prisma
	MPRAGE+PMC ****	1.0 × 1.0 × 1.0	256 × 256	176	1060	2500	240	2	off	8	Prisma

^*We were unable to find all the sequence parameters for the BCP. However, the researchers of BCP state they attempt to match as much as possible the imaging parameters of the other HCP studies (Howell et al. 2019).

^**For the HBN study, currently only one of the imaging sites (Citigroup Biomedical Imaging Center - CBIC) is collecting two structural scans for all subjects.

^***Turbo factor for the HBN MPRAGE sequence is 196.

^****Turbo factor for the HBN MPRAGE+PMC sequence is 256.