American Journal of Neuroradiology 24:472-475, March 2003
© 2003 American Society of Neuroradiology
Case Report
BRAIN
Hyperacute Subarachnoid Hemorrhage on T2-Weighted MR Images
a Department of Radiology, University Hospital Sisters of Mercy, Zagreb, Croatia
b Department of Radiology, University of North Carolina, Chapel Hill
Address for correspondence: Zoran Rumboldt, Department of Radiology, University Hospital Sisters of Mercy, Vinogradska 29, Zagreb, 10000 HR, Croatia
Summary: We describe a case of hyperacute subarachnoid and intraventricular hemorrhage from a ruptured aneurysm, which occurred while the patient was undergoing MR imaging. Compared with CSF, the blood in the subarachnoid space had slightly lower signal intensity on T2*-weighted gradient-echo images and increased signal intensity on T2-weighted spin-echo images. This finding differs from the generally accepted MR appearance of intracranial hemorrhage and should be recognized to ensure proper patient care.
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