TABLE 2.

Datasets used for each of the validation experiments. Testing images denote the images are from the 10% testing dataset listed in Table 1. Extra images denote the images are not included in Table 1.

		Validation experiments
		Histogram comparison	Intra‐inter subject comparison	t‐SNE	Cortical features comparison	Brain age prediction	Traveling subjects (1.5 T vs. 3 T)	Traveling subjects (12 scans)
ADNI	Testing images	N = 4; age range = 67–70
PPMI		N = 8; age range = 67–70
UKBB			N = 10; age range = 45–55
ADNI	Extra images			N = 290; age range = 55–65	N = 290; age range = 55–65	N = 220; age range = 55–75	N = 44; age range = 55–72
PPMI				N = 185; age range = 55–65	N = 185; age range = 55–65	N = 190; age range = 47–76
UKBB				N = 300; age range = 55–65	N = 300; age range = 55–65	N = 200; age range = 47–78
Tong								N = 3; age range = 23–26

Abbreviations: ADNI, Alzheimer's Disease Neuroimaging Initiative; PPMI, Parkinson's Progression Markers Initiative; UKBB, UK Biobank.