SNR and CNR in full- and half-dose CE-MRV*
| Full-Dose CE-MRV | Half-Dose CE-MRV | |||
|---|---|---|---|---|
| SNR | CNR | SNR | CNR | |
| Superior sagittal sinus | 611.5 ± 82.3 | 501.3 ± 77.6 | 322.2 ± 45.1 | 291.3 ± 41.6 |
| Inferior sagittal sinus | 276.8 ± 31.2 | 236.5 ± 29.3 | 158.7 ± 23.3 | 132.7 ± 21.5 |
| Straight sinus | 508.8 ± 77.6 | 461.1 ± 70.9 | 234.5 ± 32.6 | 203.8 ± 28.8 |
| Transverse sinus | 532.9 ± 81.2 | 479.2 ± 75.4 | 302.2 ± 45.6 | 269.3 ± 40.9 |
| Sigmoid sinus | 555.4 ± 84.6 | 497.6 ± 79.4 | 309.4 ± 48.1 | 261.8 ± 43.3 |
| Vein of Galen | 490.7 ± 62.3 | 434.2 ± 58.2 | 224.4 ± 29.7 | 194.4 ± 26.9 |
| Internal cerebral vein | 390.1 ± 58.8 | 342.1 ± 50.8 | 201.3 ± 31.3 | 168.6 ± 30.2 |
| Internal jugular vein | 572.6 ± 81.1 | 516.6 ± 72.9 | 334.8 ± 44.5 | 305.8 ± 40.8 |
Note:—SNR indicates signal intensity-to-noise ratio; CNR, contrast-to-noise ratio.
* All values are presented as mean ± SD. SNR and CNR values are significantly lower in the half-dose CE-MRV group compared with the single-dose CE-MRV group (P < .001 for all segments).