MR Finding in Subarachnoid Hemorrhage

Han, Dae Hee; Baek, Sun Ha; Chung, Young Soeb; Chang, Ki Hyun

Abstract

In an effort to determine the value of the magnetic resonance imaging(MRI) in patients with subarachnoid hemorrhage(SAH), we compared MR findings with CT findings in 34 patients of aneurysmal SAH who taken MRI either preoperatively or postoperatively. MRI was taken in 8 patients and postoperatively in 31 patients. Preoperative abnormal MR findings were cisternal space obliteration(in one case), subacute hematoma in cisternal space(in one case), and visualization of turbulent signal void of aneurysm(in 3 cases). In 31 patients, MRI was taken postoperatively without any problem in spite of their intracranial aneurysm clip(in 9 patients among them, MRI was taken in high(2.0T) magnetic field). And characteristic MR artifact, with sausage shaped central low signal and surrounding high signal in T2WI, appeared in postoperative MRI scans. Their dimension were about 2+4cm in T2WI axial and T2WI sagittal scans. Findings of infarction were detected in 3 cases in both MRI scans and CT scans which were taken within 3dyas interval, postoperatively 1 in total 9 cases. But findings of the hemorrhagic infarction(3 cases) and subacute hemorrhage(2 cases) were detected only in MRI scans.