AJDRAJNR - American Journal of Neuroradiology

This Article
Right arrow Abstract Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Wang, P. Y-K.
Right arrow Articles by Beauchamp, N. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Wang, P. Y-K.
Right arrow Articles by Beauchamp, N. J.

Diffusion-Negative Stroke: A Report of Two CasesGo

Paul Y-K. Wanga, Peter B. BarkerGo,a, Robert J. Wityka, Aziz M. Uluga, Peter C. M. van Zijla and Norman J. BeauchampJra

a From the Departments of Radiology (P.Y-K.W., P.B.B., A.M.U., P.C.M.v.Z., N.J.B.) and Neurology (R.J.W.), Johns Hopkins University School of Medicine, Baltimore, MD.



View larger version (140K):

[in a new window]
  		FIG 1. Case 1: 67-year-old man with word-finding and comprehension difficulties imaged 4 hours (top row) and 4 days (bottom row) after symptom onset. The T2-weighted (T2W), diffusion-weighted (Isotropic DWI), and Dav images were all normal at 4 hours; but at 4 days, the T2-weighted image showed an area of infarction in the left parietal region (arrows).



View larger version (166K):

[in a new window]
  		FIG 2. Case 2: 65 year-old man with mild to moderate aphasia, a slight left-sided facial droop, and minimal left pronator drift scanned 3.5 hours (top row), 13 hours (middle row), and 4 days (bottom row) after symptom onset.

Top row, Initial T2-weighted (T2W), diffusion-weighted (Isotropic DWI), and Dav images were normal, but the perfusion MR image revealed a large area of delayed flow in the right MCA territory.

Middle row, At 13 hours, the T2-weighted image remained normal but diffusion-weighted hyperintensity and reduced Dav are now apparent in the right MCA territory.

Bottom row, T2-weighted image at 4 days revealed hemorrhagic infarction with edema and mild mass effect. The infarct showed decreased Dav at this time, while the perilesional edema had increased Dav.





Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X