In this study, 20 regional neurosurgery centers across the country will be included, and the study cohort will be constructed on the basis of the IARP-CP cohort.The artificial intelligence platform was used to analyze the clinical, morphological, hemodynamics, aneurysm wall characteristics and other factors of unruptured aneurysms, as well as the relationship between these factors and the risk of aneurysm instability, seek the potential risk factors, and finally establish a multi-dimensional prediction model of rupture risk of intracranial aneurysms.

Inclusion Criteria:

1. 18-75 years old;
2. At least one unruptured intracranial aneurysm was found by CTA;
3. No relevant symptoms, receiving non-operative and conservative observation treatment;
4. Signing the informed consent.

Exclusion Criteria:

1. Other cerebrovascular structural lesions (such as cerebrovascular malformation and arteriovenous fistula) or craniocerebral tumors;
2. Fusiform or dissecting aneurysms;
3. Traumatic, mycotic and atrial myxoma associated aneurysms;
4. Suffering from systemic connective tissue diseases, such as polycystic kidney disease;
5. Expectant survival of no more than 3 years due to other diseases or poor general conditions;
6. Patients refuse to follow up or cannot communicate with them due to mental diseases;
7. Pregnant women or participating in other aneurysm related studies.

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