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TABLE 2: Individual subject ratio: ratio of averaged posterior to anterior hemodynamic values
Normal Controls: Ratio of Posterior/Anterior
Number Age/Sex ADC CBV CBF MTT K2
1 33/F 1.01 0.86 0.85 1.14 1.00
2 23/F 0.98 0.95 1.16 0.95 1.00
3 22/F 1.06 0.98 0.91 0.94 1.03
4 35/M 1.04 0.93 0.84 1.01 1.00
5 35/F 1.01 1.02 1.22 0.81 0.99
6 46/F 1.00 0.95 0.91 1.05 0.99
7 50/F 0.94 1.04 0.89 1.18 0.99
    Mean/SD 1.01 ± 0.04 0.96 ±0.06 0.97 ± 0.16 1.01 ± 0.13 1.00 ± 0.01
PRES: Ratio of Posterior/Anterior
1 38/F 2.16 0.05 0.23 0.23 1.02
2 66/F 0.35 0.12 0.07 0.21 0.99
3 19/M 1.83 0.45 0.31 1.49 0.99
4 44/F 2.22 0.53 0.25 1.95 1.16
5 12/F 1.88 0.50 0.54 0.60 0.99
6 42/F 1.93 0.37 0.45 0.96 1.01
7 29/F 2.12 0.03 0.10 0.90 1.00
8 23/F 1.44 0.15 0.40 1.49 1.01
    Mean/SD 1.74 ± 0.61 0.28 ± 0.21 0.29 ± 0.17 0.98 ± 0.63 1.02 ± 0.06
Note.—As anticipated, averaged ratios for all values for control subjects are near 1, which indicates symmetry between anterior and posterior regions of the brain. For subjects with PRES, pertusion values represent the ratio of affected (posterior) to normal (anterior) regions within each subjects. F, female; M, male.