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RT Journal Article
SR Electronic
T1 Diffusion-Negative Stroke: A Report of Two Cases
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1876
OP 1880
VO 20
IS 10
A1 Wang, Paul Y-K.
A1 Barker, Peter B.
A1 Wityk, Robert J.
A1 Uluğ, Aziz M.
A1 van Zijl, Peter C. M.
A1 Beauchamp, Norman J.
YR 1999
UL http://www.ajnr.org/content/20/10/1876.abstract
AB Summary: Diffusion-weighted MR imaging is generally thought to be highly sensitive for the diagnosis of acute stroke. We report two cases of hyperacute stroke with absence of changes on diffusion-weighted images within 4 hours of symptom onset. Follow-up studies, performed 4 days later, showed infarction in regions compatible with the clinical presentation and (in one case) with the initial perfusion deficit. These cases indicate that normal findings on diffusion-weighted images in patients with suspected cerebral ischemia do not rule out impending infarction.