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AJNR - American Journal of Neuroradiology

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Higher Prevalence of Cortical Lesions Observed in Patients with Acute Stroke Using High-Resolution Diffusion-Weighted Imaging

K. Benameur^a, J.L. Bykowski^a, M. Luby^a, S. Warach^a and L.L. Latour^a

^a From the Section on Stroke Diagnostics and Therapeutics, National Institute on Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Md

View larger version (73K): [in a new window]   Fig 1. Cortical ischemic lesions identified by high resolution diffusion-weighted imaging (bottom), missed by conventional DWI (top). Note in the magnifications, the location of the lesions mainly along the cortical gray ribbon.

View larger version (44K): [in a new window]   Fig 2. Thresholded binary images resulting from source diffusion-weighted images (DWI) in 2 gradient directions at the top left and center, and from source high-resolution diffusion-weighted images (DWI-HR) at the bottom left and center. Note the greater anteroposterior shift on the image resulting from the DWI source images subtraction at the top right compared with the one resulting from the dual-echo corrected DWI-HR source images at the bottom left.