Volumes of abnormality expressed as percentages of the lesion on T2-weighted imaging
| Finding | Grade III | Grade IV | P Value |
|---|---|---|---|
| Contrast enhancing | 9.8 ± 12.3 | 32.7 ± 18.5 | <.01 |
| No decrease in signal intensity | 7.6 ± 10.7 | 21.6 ± 22.7 | <.02 |
| Abnormal peak height | 13.0 ± 10.0 | 24.9 ± 15.8 | <.01 |
| Abnormal recovery | 10.1 ± 16.7 | 22.7 ± 16.9 | <.001 |