The patient presents to the ophthalmological emergencies and / or to the internal medicine department. NOIA clinical discovery Patient referred in radiology for brain and visual MRI. The two sequences added by the research (8 minutes) will be added to that of the treatment.
Patient over 18 years old
Patient with suspected NOIA, evoked after clinical examination by a specialized ophthalmologist
For which a brain and visual MRI is planned
Express consent to participate in the study
Contraindication to MRI (electrical device, metallic foreign body, claustrophobia)
Patient benefiting from a legal protection measure
Pregnant or breastfeeding woman
Patients with suspected NOIA, discussed after clinical examination by a specialist ophthalmologist
Case-only
Prospective
MRI
Other interventionDiffusion sequence (8 minutes long) added to the initial MRI
Study the sensitivity of the High resolution Diffusion sequence in the detection of NOIA, evaluated by a DWI hypersignal and an ADC hyposignal of the optic nerve
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