Perfusion parameters and P values for nonenhancing versus enhancing grade III, nonenhancing grade III versus low grade, and enhancing grade III versus grade IV gliomas
| PS (mL/100 g/min) Mean (SD) | CBV (mL/100 g) Mean (SD) | CBF (mL/100 g/min) Mean (SD) | MTT (s) Mean (SD) | |
|---|---|---|---|---|
| Low grade (8) | 0.52 (0.15) | 0.95 (0.22) | 27.0 (8.3) | 4.24 (1.42) |
| Nonenhancing grade III (3) | 0.46 (0.13) | 0.88 (0.16) | 26.1 (3.4) | 3.23 (0.64) |
| Enhancing grade III (3) | 1.61 (0.57) | 2.77 (1.52) | 51.7 (20.8) | 5.96 (0.75) |
| WHO grade IV (18) | 2.81 (1.28) | 3.12 (0.97) | 96.3 (79.8) | 4.69 (1.32) |
| P values for nonenhancing vs. enhancing grade III | .011 | .029 | .055 | .012 |
| P values for low grade vs. nonenhancing grade III | .623 | .699 | .971 | .330 |
| P values for enhancing grade III vs. grade IV | .052 | .438 | .322 | .128 |
PS indicates permeability surface-area product; CBV, cerebral blood volume; CBF, cerebral blood flow; MTT, mean transit time.