TABLE 2:

Summary of infarction size, values, and ratios of cerebral blood flow, cerebral blood volume, and mean transit time

Control (n = 13)Progress (n = 13)P value*
Infarction size on MR image
 Initial FLAIR image (mm2)50.8 ± 21.748.7 ± 21.00.814
 Follow-up T2WI (mm2)53.5 ± 21.478.3 ± 34.30.037
Value and ratio on perfusion CT scan
 CBF value (ml/100 g/min)26.1 ± 7.019.6 ± 9.00.052
 CBV value (ml/100 g)4.3 ± 0.94.8 ± 1.90.349
 MTT value (second)10.0 ± 1.314.5 ± 3.5<0.001
 CBF ratio0.9 ± 0.10.6 ± 0.20.016
 CBV ratio1.0 ± 0.21.0 ± 0.30.695
 MTT ratio1.1 ± 0.11.5 ± 0.4<0.001
  • Note.—FLAIR indicates fluid-attenuated inversion recovery; T2WI, T2-weighted image; CBF, cerebral blood flow; CBV, cerebral blood volume; MTT, mean transit time. All values are expressed as average ± SD.

  • * The differences in value and ratio of cerebral blood flow, cerebral blood volume, and mean transit time were analyzed statistically between the two groups by using the unpaired Student’s t test.