Carotid stenosis is a serious cerebrovascular disease, which can lead to serious consequences, such as cerebral ischemia and TIA attacks in mild cases, or cerebral infarction in severe cases, even leading to disability and death. Therefore, we must pay attention to prevention and control in life, early detection and early treatment. So how should carotid artery stenosis be detected? Can a CT reveal carotid artery stenosis? As a matter of fact, a CT is usually not able to diagnose carotid stenosis. For the diagnosis of carotid artery stenosis, relatively simple things like carotid ultrasound and carotid vascular ultrasound can reveal carotid artery stenosis; while for a more rigorous and detailed diagnosis, CTA (CT angiography), MRA (magnetic angiography), DSA (cerebral angiography), etc. can be done. As for the treatment of carotid stenosis, generally speaking, for mild carotid stenosis (stenosis rate less than 50%), conservative medical treatment, strict standardized medication, and regular review are recommended; while patients with moderate carotid stenosis (stenosis rate 50%-70%), symptomatic patients, or unstable plaques, should undergo surgery in a timely manner; patients with severe carotid stenosis, whether symptomatic or not, should undergo surgery as soon as possible Treatment. Currently, carotid endarterectomy is recognized by the international and domestic medical community as the standard procedure for the treatment of carotid stenosis and prevention of cerebral infarction. In the 1950s, foreign medical experts successfully completed the first carotid endarterectomy to prevent cerebral infarction, and it has since become a standard procedure. Since then, the technique has become quite mature and is widely performed in Western Europe and the United States, and has become a routine treatment for carotid artery stenosis. Carotid endarterectomy is performed under a microscope to ensure the safety of the procedure. The intimal plaque is peeled off and removed during the procedure, restoring the normal size of the carotid lumen and blood flow to a smooth flow, with remarkable results.