26. Figure 3. Perfusion-weighted MR Imaging. Imaging series of a patient presenting within 4 hours of onset of left hemiparesis and left neglect.
27. Figure 1. Selected neurologic images in a 91-year-old woman who presented in the emergency department 2 hours after onset of left-sided hemiparesis, which was witnessed by a companion. A) , Initial CT scan of the head. B) b , Proton-density–weighted MR image obtained approximately 1 hour after the CT scan . C) T2-weighted MR image D) Diffusion-weighted MR image shows a large right middle cerebral artery territory stroke (arrows). E) Follow-up CT scan obtained 5 days later DIFUSION