Predictive Multimodal MRI Factors in Subacute Cerebral Artery Occlusiontreated by Thrombectomy (PIMISUTT)

Inclusion Criteria: * Patients aged ≥ 18 years old * Hospitalized at the Poitiers University Hospital * Acute middle cerebral artery occlusion diagnosed by CT-scan or MRI * NIHSS score ≥ 6 at admission * To be treated by thrombectomy with or without fibrinolysis * Written information delivered to the patient or his relatives concerning the study and its benefit and risk Exclusion Criteria: * Patients or relatives whom a loyal information about the study cannot be given * Patient with cognitive impairments before MRI. * Patients who cannot undergo MRI because of contraindications * Patients too deteriorated to tolerate one hour long exam