Inclusion Criteria:  Mild traumatic brain injury with glascow included between 13 and 15, with indication of scan possibilty of performing an MRI at 7 days Patient able to get to MRI at Day 7 Free consentement to the study Any measure of guardianship or curatorship , any link of subordination  Exclusion Criteria:  Patient does not hospitalized about head trauma Inhability to move out for run the seven day MRI Contraindication for MRI Patient having already consulted the emergency for head trauma requiring imaging Patients with psychiatric troubles : bipolarity, panic trouble, depressive trouble, schizophrenia Patient already enrolled in the study History of brain, tumor or neurosurgery Untreated or poorly treated chronic vertigo Untreated or poorly treated chronic migraines Claustrophobia BMI > 40 Refusal of consent to take part of the study No social welfare or inhability to benefit of it by a third party Patients with enhanced protection : minor aged under 18 ; person with freedom restriction by justice decision or administrative ; homeliving in health or social establishment ; adult in legal protection Pregnant and nursing women