Inclusion Criteria:  Age ≥18 years; Candidate for CAS Presence of a WEB-diaphragm lesion at carotid artery ostium, proved by non-invasive imaging (CTA or MRA) No minimum delay between previous stroke therapy (IMT) is required Double antiplatelet therapy the day before the procedure and 1 month after the procedure is required The patient provides written informed consent as approved by the applicable Ethics Committee and is willing to comply with all study requirements including 30 days follow-up. The patient is affiliated with a social security scheme  Exclusion Criteria:  Target lesion has atherosclerotic or dissection stenosis or occlusion; Treatment of in-stent restenosis, or prior stent in the target vessel proximal to the target lesion; CAS performed at the end of intracranial mechanical thrombectomy Contra-indications of double antiplatelet therapy the day before the procedure and 1 month after the procedure Patients under judicial protection, tutorship or curatorship Any patient participating in another clinical study valuating a drug or a medical device (except registries for which the primary endpoint has not been evaluated); Pregnant and breast-feeding women or intention to become pregnant prior to completion of all follow-up procedures.