Imaging Evidence for Cerebral Hyperperfusion Syndrome after Intravenous Tissue Plasminogen Activator for Acute Ischemic Stroke

Figure 1

Hyperperfusion on computed tomography perfusion and the dilation of the left middle cerebral artery and its branches on CT angiogram after iv tPA treatment: (a) increased cerebral blood volume; (b) shortened time to peak; (c) increased cerebral blood flow; (d) shortened mean transit time.

(a)

(b)

(c)

(d)