Perfusion characteristics
| Territory | CBV (ml/100 g) | CBF (ml/100 g/min) | MTT (seconds) |
|---|---|---|---|
| CT perfusion values—symptomatic hemisphere | |||
| ACA | 4.1 ± 1.4 | 50.4 ± 18.8 | 5.0 ± 0.7 |
| MCA | 5.3 ± 1.4 | 56.1 ± 17.8 | 5.9 ± 1.3 |
| Basal ganglia | 4.3 ± 1.3 | 49.3 ± 17.6 | 5.5 ± 1.2 |
| PCA | 4.9 ± 1.4 | 50.9 ± 15.4 | 5.8 ± 0.7 |
| CT perfusion values—asymptomatic hemisphere | |||
| ACA | 3.9 ± 1.3 | 50.9 ± 18.1 | 4.7 ± 0.7 |
| MCA | 5.3 ± 1.6 | 70.7 ± 22.3 | 4.5 ± 0.6 |
| Basal ganglia | 4.3 ± 1.3 | 57.2 ± 20.5 | 4.6 ± 0.9 |
| PCA | 5.0 ± 1.6 | 53.7 ± 16.9 | 5.6 ± 0.9 |
| CT perfusion ratios (symptomatic/asymptomatic side) | |||
| ACA | 1.05 ± 0.14 | 1.01 ± 0.13 | 1.06 ± 0.10 |
| MCA | 1.01 ± 0.12 | 0.81 ± 0.14 | 1.28 ± 0.17 |
| Basal ganglia | 1.03 ± 0.09 | 0.88 ± 0.08 | 1.18 ± 0.12 |
| PCA | 1.05 ± 0.22 | 1.00 ± 0.17 | 1.06 ± 0.13 |
Note:—CBV indicates cerebral blood volume; CBF, cerebral blood flow; MTT, mean transit time; ACA, anterior cerebral artery; MCA, middle cerebral artery; PCA, posterior cerebral artery. Perfusion characteristics in our study group of 20 patients with symptomatic carotid artery stenosis. CT perfusion values and ratios (mean ± SD) are given for the various vascular flow territories. Note that numbers were calculated from mean values of 3 observations. For CT perfusion values, 80 data points (20 patients × 2 slabs × 2 hemispheres) were used for each territory. For CT perfusion ratios, 40 data points (20 patients × 2 slabs) were used for each territory.