CTP absolute values for penumbra that infarcts (region 2) and penumbra that recovers (region 3) in gray and white matter
| Region 2 Mean ratio ± SD | Region 3 Mean ratio ± SD | P Value | |
|---|---|---|---|
| GM CBV (ml/100 g) | 3.54 ± 1.33 | 3.87 ± 0.61 | 0.34 |
| WM CBV (ml/100 g) | 2.64 ± 1.38 | 2.27 ± 0.93 | 0.46 |
| GM CBF (ml/100 g/min) | 17.17 ± 8.67 | 27.22 ± 9.74 | 0.01 |
| WM CBF (ml/100 g/min) | 10.12 ± 4.77 | 14.01 ± 7.61 | 0.06 |
Note:— CBF indicates cerebral blood flow; CBV, cerebral blood volume; GM, gray matter; WM, white matter.