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Neuroradiology. 2004 Jan;46(1):44-8. Epub 2003 Dec 4.

MRI in acute subarachnoid haemorrhage; findings with a standardised stroke protocol.

Author information

1
Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Centre, Im Neuenheimer Feld 400, 69120, Germany. Jochen_Fiebach@med.uni-heidelberg.de

Abstract

There is doubt as to whether acute haemorrhage is visible on MRI. We carried out MRI within 6 h of symptom onset on five patients with minor (low Hunt and Hess grades 1 or 2) subarachnoid haemorrhage (SAH) diagnosed by CT to search for any specific pattern. We used our standard stroke MRI protocol, including multiecho proton density (PD)- and T2-weighted images, echoplanar (EPI) diffusion- (DWI) and perfusion- (PWI) weighted imaging, and MRA. In all cases SAH was clearly visible on PD-weighted images with a short TE. In four patients it caused a low-signal rim on the T2*-weighted source images of PWI, and DWI revealed high signal in SAH. In the fifth patient SAH was perimesencephalic; susceptibility effects from the skull base made it impossible to detect SAH on EPI DWI and T2*-weighted images. Perfusion maps were normal in all cases. MRA and conventional angiography revealed an aneurysm in only one patient. Stroke MRI within 6 h of SAH thus shows a characteristic pattern.

PMID:
14655034
DOI:
10.1007/s00234-003-1132-8
[Indexed for MEDLINE]

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