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. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: Neuroimaging Clin N Am. 2010 Nov;20(4):455–468. doi: 10.1016/j.nic.2010.07.002

Figure 1.

Figure 1

75 year-old man presenting with sudden onset of a left face-arm-leg hemisyndrome. Physical examination revealed a left hemianopsia, rightward gaze deviation, dysarthria, and left hemineglect. CT and MR examination were obtained 2 and 3 hours after admission, respectively. Perfusion-CT (cerebral blood volume CBV, mean transit time MTT, cerebral blood flow CBF) and DWI-trace images clearly depict an acute stroke extending to the superficial right middle cerebral artery territory. Note how the lesion is far more subtle on the corresponding T2-weighted image, and especially on the noncontrast CT, where it features a “cortical ribbon loss” sign.