Acute Stroke

This 45 year-old woman noticed the sudden onset of right body weakness and trouble speaking at about 400 PM. At the hospital, Roentgen-ray CT was normal, and the conventional T2-weighted MR image acquired 8 hours after onset of symptoms showed only subtle changes, appreciated only in retrospect. Please see Tour 1.
Some details have been altered to protect confidentiality.
Keith A. Johnson (, J. Alex Becker (