TABLE 7.
Inter and intra-scanner variability of MD in white matter ROIs.
| Label | Measure | Mean MD | SD MD | CV (%) MD | Inter: intra CV ratio | Mean MD | SD MD | CV (%) MD | Inter: Intra CV ratio |
| LEFT | RIGHT | ||||||||
| Anterior limb internal capsule | Inter-scanner | 7.3 | 0.6 | 8.2 | 5.9 | 7.4 | 0.6 | 8.1 | 5.8 |
| Mean intra-scanner | 7.2 | 0.1 | 1.4 | 7.3 | 0.1 | 1.4 | |||
| Arcuate fasciculus region 1 | Inter-scanner | 7.2 | 0.4 | 5.6 | 4.0 | 7.3 | 0.4 | 5.5 | 3.9 |
| Mean intra-scanner | 7.2 | 0.1 | 1.4 | 7.3 | 0.1 | 1.4 | |||
| Arcuate fasciculus region 2 | Inter-scanner | 7.5 | 0.3 | 4.0 | 3.1 | 7.3 | 0.2 | 2.7 | 1.9 |
| Mean intra-scanner | 7.5 | 0.1 | 1.3 | 7.3 | 0.1 | 1.4 | |||
| Arcuate fasciculus region 3 | Inter-scanner | 7.5 | 0.3 | 4.0 | 3.1 | 7.6 | 0.3 | 3.9 | 3.0 |
| Mean intra-scanner | 7.5 | 0.1 | 1.3 | 7.6 | 0.1 | 1.3 | |||
| Cingulum | Inter-scanner | 7.6 | 0.4 | 5.3 | 4.1 | 7.5 | 0.4 | 5.3 | 4.1 |
| Mean intra-scanner | 7.6 | 0.1 | 1.3 | 7.5 | 0.1 | 1.3 | |||
| Posterior limb internal capsule | Inter-scanner | 7.2 | 0.5 | 6.9 | 4.9 | 7.0 | 0.4 | 5.7 | 4.1 |
| Mean intra-scanner | 7.2 | 0.1 | 1.4 | 7.0 | 0.1 | 1.4 | |||
| Sagittal stratum | Inter-scanner | 8.3 | 0.5 | 6.0 | 2.5 | 8.1 | 0.4 | 4.9 | 4.1 |
| Mean intra-scanner | 8.3 | 0.2 | 2.4 | 8.1 | 0.1 | 1.2 | |||
| Uncinate fasciculus | Inter-scanner | 8.0 | 0.4 | 5.0 | 2.0 | 8.1 | 0.3 | 3.7 | 1.5 |
| Mean intra-scanner | 8.1 | 0.2 | 2.5 | 8.1 | 0.2 | 2.5 | |||
|
BILATERAL | |||||||||
| Corpus callosum | Inter-scanner | 9.0 | 0.6 | 6.7 | 6.1 | ||||
| Mean intra-scanner | 9.0 | 0.1 | 1.1 | ||||||
All scans were included (n = 24). DTI data were not available Scanner B. MD is scaled × 10,000 mm2/s.