Inclusion Criteria:  19 year old or older untreated ruptured intracranial aneurysms with an anatomy such that endovascular treatment with either bare platinum or second-generation hydrogel coils was considered feasible. person who agreed to study  Exclusion Criteria:  contrast allgery (+) combined other intracranial lesions (tumor, moyamoya disease, cerebral vascular diseases) ineligible for coil embolization