Quantitative comparison of DTI tractography for the corticospinal tract and arcuate fasciculus ipsilateral to the lesion in 13 subjectsa
| Diffusion Technique | Standard | SMS | Mean Individual Differenceb | 95% CI for Difference | P Value |
|---|---|---|---|---|---|
| Corticospinal tract | |||||
| Volume (mL) | 30.7 [SD, 9.1] | 32.9 [SD, 9.7] | –2.3 [SD, 4.0] | –9.4 to +5.0 | .062c |
| Length (mm) | 125.2 [SD, 13.1] | 124.0 [SD, 15.0] | 1.2 [SD, 7.0] | –9.6 to +12.0 | .537c |
| Mean FA | 0.45 [SD, 0.04] | 0.46 [SD, 0.04] | –0.01 [SD, 0.02] | –0.04 to +0.02 | .076c |
| Arcuate fasciculus | |||||
| Volume (mL) | 25.3 [SD, 5.3] | 26.0 [SD, 6.7] | –0.7 [SD, 3.1] | –5.3 to +3.9 | .438c |
| Length (mm) | 77.4 [SD, 7.1] | 76.5 [SD, 6.7] | 0.9 [SD, 4.6] | –4.4 to +6.2 | .482c |
| Mean FA | 0.36 [SD, 0.04] | 0.36 [SD, 0.04] | 0.00 [SD, 0.01] | –0.03 to +0.03 | 1.000c |
| Spatial misregistration (mm)d | 3.4 [SD, 1.6] | 2.8 [SD, 1.0] | 0.6 [SD, 1.3] | –0.4 to +1.6 | .135c |
↵a Data are mean (SD) or 95% CI.
↵b Difference between measurements in the same individual (standard value minus SMS value).
↵c Paired-sample 2-tailed t test.
↵d Difference between the anterior margin of the cervicomedullary junction at the foramen magnum depicted by volumetric T1 MR imaging versus CST diffusion tractography.