Table 1:

Diffusion eigenvalues for different diffusion times, Δ, averaged over young and senior participants. SNR of the b₀ image for different diffusion times, Δ averaged over all participants.

Δ [ms]	b0 [s/mm2]	SNR	λ1 [ μm2/ms]		λ2 [ μm2/ms]		λ3 [ μm2/ms]
			young	senior	young	senior	young	senior
30	2.4	108	2.26 ± 0.15	2.32 ± 0.17	1.71 ± 0.06	1.64 ± 0.23	1.14 ± 0.09	1.25 ± 0.11
38	3.6	104	2.16 ± 0.14	2.18 ± 0.15	1.47 ± 0.13	1.43 ± 0.22	1.09 ± 0.09†	1.27 ± 0.10†
76	6.0	97	2.00 ± 0.18	2.03 ± 0.13	1.28 ± 0.16	1.27 ± 0.19	0.91 ± 0.09†	1.06 ± 0.13†
105	12.0	95	1.96 ± 0.23	1.99 ± 0.13	1.18 ± 0.16	1.17 ± 0.16	0.82 ± 0.12*	1.02 ± 0.11*
204	24.2	86	1.88 ± 0.24	1.89 ± 0.20	1.13 ± 0.12	1.10 ± 0.10	0.67 ± 0.08*	0.86 ± 0.10*
303	36.3	87	1.81 ± 0.17	1.86 ± 0.19	1.06 ± 0.12	0.98 ± 0.11	0.61 ± 0.06*	0.79 ± 0.06*
353	42.4	84	1.81 ± 0.13	1.83 ± 0.19	1.02 ± 0.11	0.92 ± 0.05	0.64 ± 0.10*	0.84 ± 0.11*
403	48.5	78	1.80 ± 0.15	1.84 ± 0.22	1.03 ± 0.12	0.91 ± 0.10	0.66 ± 0.10†	0.82 ± 0.14†
503	60.7	77	1.80 ± 0.16	1.84 ± 0.21	0.95 ± 0.14	0.88 ± 0.11	0.67 ± 0.11*	0.82 ± 0.06*
603	72.8	60	1.77 ± 0.15	1.86 ± 0.21	0.91 ± 0.15	0.86 ± 0.09	0.66 ± 0.11*	0.80 ± 0.04*

^*Significant difference between young and senior age groups ( p < 0.05)

^†Trend toward a decrease in the senior group ( p < 0.1).