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 Paul Y-K. Wang
A1 Peter B. Barker
A1 Robert J. Wityk
A1 Aziz M. Uluğ
A1 Peter C. M. van Zijl
A1 Norman J. Beauchamp, Jr
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.