MR Imaging of Hyperacute Subarachnoid and Intraventricular Hemorrhage at 3T: A Preliminary Report of Gradient Echo T2*-Weighted Sequences
Chul-Ho Sohna,d,
Seung-Kug Baika,
Hee-Jung Leea,
Sung-Moon Leea,
Il-Man Kimb,
Man-Bin Yimb,
Jae-Suk Hwangc,
M. Louis Lauzond,e and
Robert J. Sevickd,e
a Department of Radiology, Keimyung University, Daegu, Korea
b Department of Neurosurgery, Keimyung University, Daegu, Korea
c Department of Internal Medicine, Keimyung University, Daegu, Korea
d Department of Radiology, Calgary Health Region, Calgary, Alberta, Canada
e University of Calgary and Seaman Family MR Research Centre and Foothills Medical Centre, Calgary Health Region, Calgary, Alberta, Canada
View larger version (144K):
[in a new window]
|
FIG 1. 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.
| |
View larger version (89K):
[in a new window]
|
FIG 2. Case 2, a 52-year-old woman with hyperacute SAH and IVH due to a ruptured left anterior communicating artery aneurysm.
A, CT scan (1.3 hours postictus) shows extensive SAHs and IVHs in the 3rd ventricle (arrow). IVH is not evident in the lateral ventricle.
B and C, MR images obtained 5.1 hours postictus. Axial FLAIR image (B) shows increased signal intensity in both Sylvian fissures and 3rd ventricle (arrows). IVH in lateral ventricle is not visualized. Axial GRE T2*-weighted image (C) clearly shows the SAH and IVH in the Sylvian fissures bilaterally as well as 3rd ventricle and occipital horn of both lateral ventricles.
| |
