Framing Eighteen Coils in Cerebral Aneurysms Trial

Inclusion Criteria: 1. Patient presenting with ruptured or unruptured cerebral aneurysm appropriate for endovascular treatment as determined by the neurovascular treating team (neurointerventionist and/or neurosurgeon). 2. The neurointerventionist feels that the aneurysm can be safely treated with either using, or not using, a 0.015-0.0155" platinum coil. 3. Patients are 18-80 years of age (inclusive). 4. Patient must be Hunt and Hess grade 0 to 3. 5. Patient has given fully informed consent to endovascular coiling procedure. If the patient cannot consent for themselves, appropriate written consent has been sought from their next of kin or appropriate power of attorney. 6. Aneurysm 6-14 mm in maximum diameter. 7. Patient is willing and able to return for clinical evaluation and follow-up imaging evaluation (angiography or MRA) at 3-6 months and 12-18 months after endovascular treatment. 8. The patient has not been previously randomized into this trial or another related ongoing trial. 9. The aneurysm has not been previously treated by coiling or clipping. Exclusion Criteria: 1. Patient has more than one aneurysm requiring treatment in the current treatment session, and only one of those to be treated aneurysms fits the FEAT inclusion criteria (ie - if either (1) a patient has multiple aneurysms, but only one will be treated at enrollment; or (2) if two or more aneurysms are treated during the current treatment session and BOTH are able to be enrolled, then they remain eligible for the trial). Non-treated additional aneurysms may be treated at a later date with any coil type that the operator chooses). 2. Target aneurysm has had previous coil treatment or has been surgically clipped. 3. Hunt and Hess score is 4 or 5 after subarachnoid hemorrhage. 4. Inability to obtain informed consent. 5. Medical or surgical co-morbidity such that the patient's life expectancy is less than 2 years.