LAUSR

PURPOSE To determine whether orbital findings on routine brain MRI can be used to differentiate patients with intracranial hypotension from controls. METHODS The authors evaluated axial T2-weighted images for the amount of optic nerve sheath CSF and 3D-T1-weighted images for optic nerve angle of sixteen patients with intracranial hypotension and 60 controls. RESULTS Patients with intracranial hypotension demonstrated significantly decreased CSF in the optic nerve sheath. Optic nerve angle was higher in the intracranial hypotension group compared to controls. CONCLUSIONS Decreased optic nerve sheath CSF and straightened optic nerve angle are significantly more common in the setting of intracranial hypotension.