The T1 Signal Intensity Ratio of a Perilesional Edema in Patients with Cerebral Acute or Subacute Hemorrhagic Masses (n = 32)
| Diagnosis of Hemorrhagic Masses | T1 Signal Intensity Ratio of the Perilesional Edema* | P† |
|---|---|---|
| Cavernous angioma (n = 17) | 1.06 ± 0.15 | .045 |
| MR sign (+) (n = 12) | 1.13 ± 0.10 | |
| MR sign (−) (n = 5) | 0.91 ± 0.13 | |
| Other hemorrhagic mass (n = 15) | 0.91 ± 0.06 | <.001 |
| Glioblastoma (n = 5) | 0.89 ± 0.01 | |
| Metastasis (n = 4) | 0.89 ± 0.08 | |
| Acute or subacute ICH (n = 6) | 0.92 ± 0.06 |
Note:—Data are mean ± SD. MR sign indicates the MR sign of a T1 hyperintense perilesional signal. ICH indicates intracerebral hemorrhage.
* T1 signal intensity ratio indicates the ratio of signal intensity of the edema to that of the contralateral white matter.
† Comparison of the T1 signal intensity between the perilesional edema and the contralateral white matter.