Inclusion Criteria:
* Aged from 18 to 80 years, male or female;
* Patients diagnosed as intracranial aneurysms by brain CTA/MRA/DSA;
* Patients with unruptured saccular aneurysms or fusiform aneurysm who are clinically determined to use flow modulation device for endovascular treatment;
* The diameter of the target aneurysm parent vessel was 1.75-5mm;
* Patients target aneurysm is planned to be embolized using flow modulation devices only;
* The mRS Score of the patients was 0-2
* Patients understand the purpose of the study, accept the follow-up period, and agree to comply with all requirements, agree to participate in the clinical trial and voluntarily sign the informed consent.
Exclusion Criteria:
* Patients who have contraindications to antiplatelet and/or anticoagulant therapy or do not start antiplatelet therapy in time before treatment;
* Patients with anatomical structure is not suitable for endovascular treatment due to severe vascular tortuosity or stenosis shown by angiography;
* Patients with acute ruptured aneurysm or with a history of intracranial hemorrhage or subarachnoid hemorrhage within 30 days before surgery;
* Patients with target aneurysm treated with endovascular interventional therapy before enrollment;
* Known to be allergic to Nitinol platinum alloy and angiographic agents;
* Conditions that in the opinion of the investigators would prevent patients from completing the study, such as the expected survival period of active tumor less than 1-year, high-risk group of cerebral thrombosis, heart failure and atrial fibrillation;
* The target aneurysms were blood vesicular aneurysms, pseudoaneurysms, or aneurysms associated with arteriovenous malformation, moyamoya disease, or multiple aneurysms that could not be treated by a single flow modulation device;
* Serious infection is not controlled and is not suitable for operation;
* Patients who underwent major surgery or interventional therapy (such as brain, cardiac, chest, abdominal or peripheral vascular) within 30 days before surgery;
* Obvious abnormal coagulation function or bleeding tendency;
* Combined with severe renal insufficiency, creatinine greater than or equal to 200umol/L; Patients with severe liver diseases (such as acute and chronic hepatitis, cirrhosis), or ALT more than 3 times the upper normal limit;
* Pregnancy, lactation, or women of childbearing age who plan to be pregnant during the study period;
* Participation in any other clinical trial within 30 days prior to signing informed consent;
* Other conditions considered by the investigator to be inappropriate for enrollment.
