Inclusion Criteria:  Age limits to > 18 years Collection of the informed consent (patient or legal representant)  Affiliation or recipient with the mode of social security  - Groupe anévrysme rompu  Patient porteur d'un anévrysme rompu  - Groupe anévrysme non rompu  Patient porteur d'un anévrysme non rompu  Exclusion Criteria:  Subject presenting contraindications in MRI (Ferromagnetic foreign bodies, pace-maker …) Claustrophobia Women pregnant or Breast-feeding Patient participating in an other study Patient have participated in a study in the 3 months before the inclusion In period of exclusion relative to another protocol Person with majority age protected by the law (supervision or trusteeship). Patient not reading the french language Patient or representant for whom it impossible to give accurate informations