Abstract
We analyzed computed tomogram (CT) of ruptured aneurysms based on the interpretation by eight board-certified neurosurgeons. It was fairly possible to judge the site of aneurysm, development of normal pressure hydrocephalus, later occurrence of vasospasm, and grade or outcome of the patient according to the CT finding. However, symptomatic vasospasm was not markedly predictable (59%) in contrast with the report of Fisher (95%). Most of the cases analyzed had visible subarachnoid clot and were therefore classified in Group 3. This is likely attributed to the improvement in spacial resolution of CT scanners, suggesting that Fisher's classification on CT of subarachnoid hemorrhage should be modified.
