Table 1.
Description of NODDI parameters in bilateral whole-tract analyses. Exponential fits relating age and NDI for asymptote (α), y-intercent (β) and exponential time constant (k) parameters, and age where NDI reaches 90% of the asymptotic value (Texp). For all estimated parameters, the standard error is provided (SE).
| Tract | α (SE) | k (SE) | β (SE) | Texp (SE) |
|---|---|---|---|---|
| ATR | 0.606 (.023) | 0.125 (0.021) | 0.317 (.011) | 18.68 (6.64) |
| CGC | 0.614 (.121) | 0.085 (0.030) | 0.323 (.013) | 28.02 (15.02) |
| CST | 0.774 (.019) | 0.160 (.026) | 0.426 (.018) | 14.24 (4.16) |
| FMAJ | 0.640 (.023) | 0.182 (.044) | 0.367 (.024) | 12.80 (9.28) |
| FMIN | 0.538 (.009) | 0.326 (.051) | 0.243 (.026) | 7.06 (2.45) |
| IFO | 0.566 (.014) | 0.144 (.021) | 0.300 (.011) | 18.63 (3.92) |
| ILF | 0.567 (.023) | 0.119 (.022) | 0.299 (.010) | 19.45 (7.01) |
| SLF | 0.638 (.019) | 0.165 (.027) | 0.315 (.017) | 14.29 (8.54) |
| UNC | 0.486 (.020) | 0.116 (.024) | 0.295 (.008) | 19.65 (10.10) |
ATR, anterior thalamic radiation; CGC, cingulum; CST, corticospinal tract; FMAJ, forceps major; FMIN, forceps minor; IFO, inferior fronto-occipital fasciculus; ILF, inferior longitudinal fasciculus; SLF, superior longitudinal fasciculus; UNC, uncinate fasciculus.