Table 1:
Group macrostructure laterality calculations for number of voxels and number of streamlines in the arcuate bundle. For both the STAN33 and HCP100 datasets, we tested for laterality for the three tractography methods DET, PROB and ePROB using paired-sample, one-tailed t-tests.
| STAN33 | HCP100 | ||||||
|---|---|---|---|---|---|---|---|
| DET | PROB | ePROB | DET | PROB | ePROB | ||
| N(Left/Both/Right) | 0/33/0 | 0/33/0 | 0/33/0 | 0/100/0 | 0/100/0 | 0/100/0 | |
| VoxelCount | Left mean | 510.2 | 2,623.6 | 1,211.1 | 1,508.1 | 7,037.1 | 4,788.4 |
| Left stdev | 142.2 | 570.9 | 323.7 | 523.5 | 1,391.7 | 949.3 | |
| Right mean | 416.9 | 2,507.3 | 1,100.9 | 1,019.2 | 7,062.0 | 4,707.4 | |
| Right stdev | 182.5 | 541.7 | 256.0 | 531.8 | 1,425.4 | 967.0 | |
| p-value | 2.49E-03 * | 6.62E-02 | 8.41E-03 * | <10E-06 * | 5.94E-01 | 1.49E-01 | |
| t-value | 3.017 | 1.544 | 2.523 | 9.183 | −0.237 | 1.046 | |
| LI | 0.13 | 0.02 | 0.05 | 0.22 | 0.00 | 0.01 | |
| Streamline Count | Left mean | 2,047.2 | 3,300.1 | 1,974.9 | 10,439.8 | 7,801.1 | 8,570.7 |
| Left stdev | 1,049.6 | 890.9 | 724.6 | 4,463.3 | 1,557.9 | 2,082.8 | |
| Right mean | 1,022.7 | 3,075.5 | 1,408.9 | 5,563.4 | 5,779.3 | 6,755.3 | |
| Right stdev | 908.2 | 928.6 | 503.3 | 4,704.0 | 1,572.5 | 1,814.6 | |
| p-value | 1.35E-06 * | 2.57E-02 | <10E-06 * | <10E-06 * | <10E-06 * | <10E-06 * | |
| t-value | 5.723 | 2.025 | 5.597 | 9.542 | 14.095 | 10.180 | |
| LI | 0.44 | 0.04 | 0.16 | 0.38 | 0.16 | 0.12 | |
*
The indicates p-values smaller than α=0.05 (Bonferroni-corrected).
The three numbers for N indicate the number of subjects for whom only a left arcuate, both a left and a right arcuate, and only a right arcuate, respectively, could be identified. Key: stdev: standard deviation; LI: laterality index.