Results of the evaluation of the diameters of the main vesselsa
| Anatomic Structure | Mean Rater 1 (A.U.) | Mean Rater 2 (A.U.) | No. | Pearson Correlation Coefficient R | Significance |
|---|---|---|---|---|---|
| Basal vein (R) | 1.7 ± 0.4 | 1.6 ± 0.8 | 24 | 0.563 | .003 |
| Basal vein (L) | 1.8 ± 0.4 | 1.7 ± 0.4 | 25 | 0.659 | <.001 |
| Lateral mesencephalic vein (R) | 0.9 ± 0.5 | 0.9 ± 0.5 | 19 | 0.753 | <.001 |
| Lateral mesencephalic vein (L) | 0.7 ± 0.7 | 0.8 ± 0.6 | 20 | 0.828 | <.001 |
| Anterior pontomesencephalic vein | 0.6 ± 0.6 | 0.6 ± 0.5 | 25 | 0.726 | <.001 |
| SPS (R) | 2.6 ± 0.5 | 2.5 ± 0.7 | 25 | 0.663 | <.001 |
| SPS (L) | 2.6 ± 0.6 | 2.5 ± 0.6 | 25 | 0.595 | .002 |
Note:—No. indicates the number of veins present; R, right; L, left; A.U., arbitrary units.
↵a Missing veins were omitted for the calculation of the mean and rated as 0 mm for the correlation coefficient. Visible veins <0.5 mm were rated as 0.2 mm.