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Absolute within-subject variability (in %) of compartment volumes and ratios for repeated scans on different scanners. Quantiles of the distributions are tabulated.
| Parameter | Quantile |
Std. Dev. |
||
|---|---|---|---|---|
| 10% | 50% | 90% | (%) | |
| Intracranial volume | 0.47 | 1.66 | 3.92 | 1.57 |
| Brain volume | 0.65 | 4.76 | 12.34 | 4.64 |
| GM volume | 1.77 | 7.80 | 20.9 | 7.11 |
| WM volume | 4.80 | 15.2 | 32.9 | 11.9 |
| Brain ratio | 0.42 | 3.64 | 10.2 | 3.91 |
| GM/WM ratio | 10.43 | 22.7 | 50.5 | 16.4 |
| WM/GM contrast | 0.64 | 3.97 | 16.9 | 6.52 |
