Table 3.

Empirical comparison of double-excitation acquisition technique to double-echo technique: Average T-scores and CNR loss for the worse-performing technique for ASL and BOLD contrasts for the narrative comprehension task in a cohort of 7 normal adults, across the ROIs shown in Figure 7. P-values obtained using paired t-test.

Contrast	T-Score (Mean ± SEM), Double-Excitation	T-Score (Mean ± SEM), Double-Echo	p	CNR Loss, % (Mean ± SEM)
ASL	2.75 ± 0.38	1.66 ± 0.43	.003	42.51 ± 8.25
BOLD	4.44 ± 0.86	4.57 ± 0.82	n.s.	0.54 ± 16.03