This study aims to enroll patients diagnosed with AD. Patients who meet the inclusion and exclusion criteria and consent to participate will be randomly assigned to either the experimental group (receiving dcLVA surgery plus standard medication) or the control group (receiving standard medication alone). Following randomization, patients will undergo cognitive and brain MRI assessments, a lumbar puncture, and an injection of 20ml of gadodiamide contrast agent at a concentration of 0.5 mmol/L (1ml gadodiamide: 20ml 0.9% saline). MRI imaging scans will be conducted at 4 hours, 24 hours, and 48 hours post-injection to measure the dural signal unit ratio, which will be used to assess glymphatic clearance function. The study will track changes in cognitive function and glymphatic clearance function at baseline and during follow-up periods (7 days post-surgery, 6 months, and 12 months) and will evaluate the safety of the two treatment approaches.
