Fig. 1
From: Cerebral collateral circulation in experimental ischemic stroke
Clinical imaging of cerebral collaterals during acute ischemic stroke using CT-angiography. Collateral vessels [(A) small arrows] are visible in the right hemisphere. These vessels have been recruited after acute right MCA occlusion [(a) large arrows]. This patient was treated with intravenous thrombolysis and developed a small subcortical lesion (B), while the entire cortical territory was intact (C)