Table 1 Characteristics of CT imaging in SAH patients with low grade symptoms
From: Diagnosis of a subarachnoid hemorrhage with only mild symptoms using computed tomography in Japan
Finding of blood that is hyperattenuating or, if slight and admixed with CSF, appears isoattenuating in the basilar cisterns |
Sylvian fissures which are not clearly visualized bilaterally |
Differences between left and right visualization of Sylvian fissures |
Ability to recognize basal cisterns or cisternae |
The sulcus in the cerebral cortex becomes narrower as a result of cerebral edema |
Ventricular dilation (The lateral ventricles, and especially the temporal horns of the lateral ventricles are visually distinctive; “moustache sign” and the third ventricle can also be dilated.) |
Blood refluxed into the fourth and sometimes third ventricle |