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.