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Fig. 4. A, Right common carotid artery MR angiography before carotid artery stent placement (CAS). Ulcerated stenosis of the proximal internal carotid artery (ICA).
B–D, Axial diffusion-weighted images (B and C) and apparent diffusion coefficient map (D). Before CAS, ischemic focal lesion >10 mm in the left caudate nucleus, contralateral to the treated ICA.
E and F, After CAS, a new lesion is shown in the contralateral posterior fossa.
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