Risk Assessment and Mechanism Analysis of Intracranial Multiple Aneurysm Instability Based on High-resolution Magnetic Resonance, Imaging Histology and Hemodynamics

Inclusion Criteria: * Age 18-80 years old, male or infertile female; * Diagnosed as IA (intracranial aneurysm) through CTA, MRA, or DSA; And it is suitable for endovascular intervention treatment * The patient and/or their legal representative or guardian fully understand the research purpose, voluntarily participate and sign informed consent Books; * Patients willing to cooperate with high-resolution magnetic resonance imaging. * Patients willing to follow up and evaluate according to clinical research protocol requirements Exclusion Criteria: * AVM (arteriovenous malformation), Moyamoya disease, or DAVF (dural arteriovenous fistula) related aneurysms; * Patients with contraindications for high-resolution magnetic resonance imaging; * Participants in clinical trials of other drugs or medical devices; * Patients with severe underlying diseases and extremely poor clinical conditions who cannot tolerate general anesthesia surgery; * Patients with poor compliance and inability to cooperate with follow-up; * Possible or clear history of severe allergy to contrast agents; * Patients with a life expectancy of less than 2 years; * Women who are breastfeeding and preparing for pregnancy during the study period