Fig. 1

Internal carotid artery of the patient. a: Severe left carotid artery stenosis in the neck CTA. b Left carotid artery lumen unobstructed after CAS in the neck CTA. c Severe left internal carotid artery stenosis in the DSA. d Stent implantation lumen unobstructed in the DSA. DSA: digital subtraction angiography