Fig. 1

Patient images before carotid artery stenting. a (T2WI [2013-5-5]) and b (T2WI [2013-10-14]):T2-weighted image shows internal border zone cerebral infarction. c, d (2014-12-2): T2 flair image and T2-weighted image showed hyperintensity in the left temporal and occipital lobes. e (2014-12-26): CT image showed low density in the left internal border zone and temporal and occipital lobes. f CT perfusion image showed mild cerebral ischemia of left cerebral hemisphere. g CT angiography (2015-01-03) showed severe left carotid artery stenosis. h, i DSA showed severe left carotid artery stenosis with stenting therapy. (j): 3-month follow-up CT angiography of left carotid artery after carotid artery stenting