MR Imaging of Hyperacute Subarachnoid and Intraventricular Hemorrhage at 3T: A Preliminary Report of Gradient Echo T2*-Weighted Sequences

Case 1, a 65-year-old woman with hyperacute SAH and IVH due to a ruptured left anterior communicating artery aneurysm.

A, CT scan (7.3 hours postictus) shows an SAH and IVH in the both Sylvian fissures, the anterior interhemispheric fissure, and the occipital horns of both lateral ventricles.

B–D, MR images obtained 10.3 hours postictus. Axial FLAIR image (B) shows high signal intensity in the anterior interhemispheric fissure and both Sylvian fissures (black arrows). A layered area mildly increased signal intensity is evident in occipital horn of the left lateral ventricle (white arrow). Axial GRE T2*-weighted image (C) shows decreased signal intensity in the interhemispheric and both Sylvian fissures, 3rd ventricle, and occipital horns of both lateral ventricles (arrows). Axial fast spin-echo T2-weighted image (D) shows linear low signal intensity in the anterior interhemispheric fissure (arrow) and blood-CSF layered pattern of the IVH (arrowheads) in the occipital horns of both lateral ventricles.