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An 81-year-old man presented with transient right arm and leg weakness. A, Digital subtraction angiography shows severe stenosis of the left proximal ICA. CAS of this lesion was performed by the carotid artery catheterization technique with a 7F or 8F catheter manipulated over a 0.035-inch guidewire. B and C, DWI obtained at 1 day before CAS shows no abnormal signal intensity. D and E, DWI obtained at 1 day after CAS shows 2 small NES in the right occipital lobe and left temporal lobe.
