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Table 3: 
CTP absolute values for penumbra that infarcts (region 2) and penumbra that recovers (region 3) in gray and white matter
Region 2 Mean ratio ± SDRegion 3 Mean ratio ± SDP Value
GM CBV (ml/100 g)3.54 ± 1.333.87 ± 0.610.34
WM CBV (ml/100 g)2.64 ± 1.382.27 ± 0.930.46
GM CBF (ml/100 g/min)17.17 ± 8.6727.22 ± 9.740.01
WM CBF (ml/100 g/min)10.12 ± 4.7714.01 ± 7.610.06
  • Note:— CBF indicates cerebral blood flow; CBV, cerebral blood volume; GM, gray matter; WM, white matter.