The primary objective of this registry is to assess the safety and angiographic outcomes of endovascular treatment of intracranial aneurysms using the DeltaMaxx Microcoil System.

Inclusion Criteria:

• Subject age ≥18 and ≤80 with a diagnosis of ruptured or unruptured intracranial aneurysm judged suitable for selective endovascular treatment by coil occlusion during single procedure
• Investigator intends to use DeltaMaxx Microcoil system during coiling procedure
• Investigator intends to use only Codman Neuro microcoils during coiling procedure
• Aneurysm size [largest measurement from the cross sectional images to determine overall aneurysm size, not just the lumen] ≥6 mm
• If ruptured aneurysm: Hunt and Hess 1, 2, or 3
• If unruptured aneurysm: Subject grade Modified Rankin Scale 0 - 2
• The subject or his/her Legally Authorized Representative must voluntarily provide Informed Consent for participation in this study and agree to return for all study visits.

Exclusion Criteria:

• Prior treatment (surgical or endovascular) of the target aneurysm
• Subjects with more than one aneurysm (>2 mm) that have been treated with endovascular or clipping techniques in the past 30 days.
• Subject with social, medical or psychological conditions that interfere with treatment and follow-up evaluation
• Women who are pregnant or plan to become pregnant during the study
• Life expectancy less than 12 months.
• Presence of arteriovenous malformation
• Fusiform, mycotic, traumatic, or tumoral aneurysms
• Planned aneurysm treatment by parent vessel occlusion
• Subject enrolled in any concurrent study

Subjects who have been diagnosed with a ≥ 6 mm intracranial aneurysm.