Table 1.

(Top) Segmentation Dice scores. Statistically significant improvements (2-tailed paired t-test, p < 0.05) over the cross-sectional method⁸ are denoted in bold. (Bottom) The performance consistency, computed as the absolute difference of Dice score between two time-points of a subject. Underlined entries highlight better performance consistency. For both tables, results are presented as mean ± std. dev.

Dice score
	R thalamus	L thalamus	R caudate	L caudate	R pallidum	L pallidum	R putamen	L putamen
Cross-sec.8	0.979±0.005	0.980±0.004	0.975±0.008	0.974±0.007	0.967±0.011	0.965±0.014	0.980±0.005	0.980±0.006
Longitudinal	0.980±0.004	0.980±0.004	0.976±0.007	0.975±0.007	0.969±0.009	0.968±0.011	0.981±0.004	0.981±0.006
Absolute difference of Dice score between time points (×10−1)
	R thalamus	L thalamus	R caudate	L caudate	R pallidum	L pallidum	R putamen	L putamen
Cross-sec.8	0.021±0.020	0.029±0.024	0.040±0.036	0.048±0.046	0.067±0.052	0.069±0.059	0.033±0.026	0.036±0.029
Longitudinal	0.023±0.016	0.028±0.025	0.036±0.040	0.035±0.034	0.061±0.050	0.068±0.063	0.036±0.027	0.034±0.027