 Patients will be between 18 and 80 years of age inclusiveand have a documented untreated intracranial aneurysm, less than or equal to 5 mm, ruptured or unruptured, for which Ultra coils are treatment options, and for which primary coiling treatment is planned to be completed during a single procedure i.e., no staged treatment. Preliminary intracranial stent placement andor use of an intracranial endoluminal balloon device as adjunctive therapy is allowed. 