Table 2.

Scanner information, sequence name with imaging parameters (TE, TR, and TI if known), acquisition resolution, and age information (mean ± standard deviation) of the training and evaluation datasets.

	Site $A$ (IXI)	Site $B$ (IXI)	Site $C$ (OASIS3)	Site $D$ (OASIS3)	Site $E$ (OASIS3)
	Philips Intera 1.5T	Philips Gyroscan 3T	Siemens Sonata 1.5T	Siemens TimTrio 3.0T	Siemens TimTrio 3.0T
	Age: 44.5 ± 7.8	Age: 52.l ± 9.2	Age: 60.4 ± 7.1	Age: 65.5 ± 10.5	Age: 58.2 ± 9.3
${\text{T}}_1-\text{w}$	MPRAGE: 4.6ms, unknown, unknown	MPRAGE: 4.6ms, unknown, unknown	MPRAGE: 3.93ms, 1.9s, 1.1s	MPRAGE: 3.16ms, 2.4s, 1s	MPRAGE: 3.16ms, 2.4s, 1s
	1.2 × 0.94 × 0. 94mm	1.2 × 0.94 × 0.94mm	1 × 1 × 1mm	1 × 1 × 1mm	1 × 1 × 1mm
${\text{T}}_2-\text{w}$	TSE: 100ms, 8.2s	TSE: 100ms, 8.2s	TSE: 116ms, 6.0s	TSE: 455ms, 3.2s	TSE: 455ms, 3.2s
	0.94 × 0.94 × 1.25mm	0.94 ×0.94 × 1.25mm	0.9 × 0.9 × 5mm	1 × 1 × 1mm	1 × 1 × 1mm
	Site $F$ (OASIS3)	Site $G$ (BLSA)	Site $H$ (BLSA)	Site $I$ (BLSA)	Site $J$ (BLSA)
	Siemens BioGraph 3.0T	Philips Intera 1.5T	Philips Achieva 3T	Philips Achieva 3T	Philips Achieva 3T
	Age: 68.2 ± 6.9	Age: 71.2 ± 10.9	Age: 69.3 ± 7.9	Age: 79.5 ± 11.1	Age: 78.4 ± l2.2
${\text{T}}_1-\text{w}$	MPRAGE: 2.95ms, 2.3s, 0.9s	MPRAGE: 3.3ms, 3s, unknown	MPRAGE: 3.1ms, 3s, 0.8s	MPRAGE: 3.1ms, 3s, 0.8s	MPRAGE: 3.1ms, 3s, 0.8s
	1.05 × 1.05 × 1.2mm	0.94 × 0.94 × 1.5mm	1 × 1 × 12mm	1 × 1 × 12mm	1.2 × 1 × 1mm
${\text{T}}_2-\text{w}$	TSE: 454ms, 3.2s	TSE: 100ms, 5.0s	TSE: 100ms, 3.0s	TSE: 100ms, 3.0s	TSE: 100ms, 3.0s
	1 × l × 1mm	0.94 × 0.94 × 3mm	0.94 × 0.94 × 3mm	0.94 × 0.94 × 3mm	0.94 × 0.94 × 3mm