Figure 1.

Non-contrast CT scan (a), rCBF (b), and rCBV (c) maps of a 63-year-old man with an acute stroke due to an occlusion of the M1 segment of the right middle cerebral artery. Complete recanalization was obtained with mechanical thrombectomy. CT performed 24 h later (d) showed malignant cerebral edema with 12 mm midline shift. Non-contrast CT scan (e), rCBF (f), and rCBV (g) maps of a 60-year-old female with an acute stroke due to right MCA M1 occlusion and complete recanalization after mechanical thrombectomy. CT performed 24 h later (h) showed mild edema without a midline shift. Note the difference in the perfusion maps, with a greater decrease in CBF and, especially, CBV in the first case, that developed malignant cerebral infarction.