CT values of brain parenchyma adjacent to the Sylvian vallecula*
| Groups | CT Values (HU) | |||
|---|---|---|---|---|
| No. | Mean | SD | Range (Min-Max) | |
| Pseudo-SAH(+) | 18 | 26.8†‡ | 3.1 | 19.0–31.0 |
| Pseudo-SAH(−)§ | 54 | 29.8‡ | 1.9 | 24.0–34.0 |
| SAH-CPA | 16 | 30.0‡ | 2.3 | 27.0–36.0 |
| SAH | 26 | 31.2 | 1.9 | 28.0–35.0 |
| Healthy | 40 | 32.5 | 1.7 | 30.0–35.0 |
Note:—No. indicates number of hemispheres, Min, minimum; Max, maximum.
* ANOVA, P < .0001.
† P < .0001, as compared with the other 4 groups (Bonferroni post hoc test).
‡ P < .0001, as compared with healthy groups (Bonferroni post hoc test).
§ One case of Pseudo-SAH(−) group was excluded because of contrast media injection.