Evaluation of Brain Health and Surgical Efficacy in Patients With Carotid Artery Stenosis

Inclusion Criteria: * Aged over 50 years old; * Conscious and capable of completing neuropsychological scales * Clinical detection of carotid artery stenosis requires surgical treatment; * Compliant with carotid artery stenting or carotid endarterectomy surgical standards * Individuals with normal cognition and mild cognitive impairment Exclusion Criteria: * Degree of vascular blockage in other intracranial segments ≥ 50% * Have a history of mental illness, nervous system disease (such as stroke) or brain injury with loss of consciousness for more than five minutes; * Neurological and psychiatric disorders unrelated to AD (schizophrenia, depression, etc.), post-traumatic stress disorder, obsessive-compulsive disorder, multiple sclerosis, amyotrophic lateral sclerosis) * Have a history of alcohol or drug abuse * There are contraindications for magnetic resonance imaging examination * Those with significant organ dysfunction such as lung, liver, and kidney; * Patients with intracranial tumors, infectious diseases, and blood system diseases; * Participating in other clinical studies at the same time