Fig 2.

A 69-year-old male patient with a sudden decrease in consciousness. SWI shows susceptibility artifacts from thrombotic material in the basilar artery (A, white arrow) and the right posterior cerebral artery (B, white arrowhead). Hemorrhagic transformation of a subacute infarction in the vascular territory of the right posterior cerebral artery is seen. DSA confirms occlusion of the basilar artery (C, anteroposterior projection, black arrowhead). Following successful endovascular recanalization of the basilar artery, the occlusion in the perimesencephalic segment of the right posterior cerebral artery, already known from pretreatment SWI, becomes visible in DSA as well (D, anteroposterior projection, black arrow).