TABLE 3.

Pearson Correlation and ICC Analysis for SUVR of External ¹⁸F-FDG PET Dataset (n = 78) Relative to FreeSurfer Approach

	SPM with MRI				SPM without MRI				Proposed
Region	Slope	y-intercept	R²	ICC	Slope	y-intercept	R²	ICC	Slope	y-intercept	R²	ICC
Cerebral cortex	0.784	0.175	0.689	0.455	0.894	0.074	0.872	0.730	0.986	−0.003	0.950	0.938
Frontal	0.849	0.101	0.631	0.486	0.948	−0.008	0.868	0.628	0.997	−0.013	0.934	0.945
Parietal	0.617	0.312	0.425	−0.124	0.837	0.139	0.842	0.690	0.943	0.025	0.927	0.819
Temporal	0.896	0.094	0.766	0.852	0.885	0.101	0.854	0.879	0.996	0.009	0.958	0.975
Occipital	0.795	0.155	0.591	0.292	0.781	0.248	0.802	0.879	0.958	0.028	0.909	0.910
Subcortex	1.123	−0.112	0.859	0.891	1.049	−0.153	0.812	0.282	0.950	0.051	0.914	0.956