Population-based Investigation of Aneurysm Incidence

Inclusion Criteria: * Age 35-75 * Individuals with normal cognitive and communication abilities * No serious complications, such as uncontrolled hypertension, diabetes or other chronic diseases that may affect the test results. * Basic blood test is normal or close to normal range. Exclusion Criteria: * Pregnancy * Severe heart disease, renal insufficiency, liver dysfunction and other major diseases. * In the past 6 months, there were strokes, or other types of intracranial tumors, infections and other diseases that may affect the screening results. * There are metal implants, including dentures, pacemakers, etc. * Using or recently used drugs that may affect blood biomarkers ( such as anticoagulant drugs, immunosuppressive agents, etc. ). * There are serious mental illness or cognitive dysfunction, such as claustrophobia, unable to cooperate with the completion of the test. * It is currently participating in other clinical trials or has participated in other clinical trials in the past 3 months.