Inclusion Criteria:  Patient presenting to the emergency room of the CHU of Nîmes for a cranial trauma requiring scanning. Patient with isolated head injury or polytrauma patient with head injury among others. The patient or their legal representative or family member must have given their free and informed consent and signed the consent form, or the patient was included under an emergency situation The patient must be a member or beneficiary of a health insurance plan  Exclusion Criteria:  The subject is participating in a study prohibiting participation in other studies, or is in a period of exclusion determined by a previous study Patient is pregnant, parturient or breastfeeding