38 years, Male, headache. Evaluate for structural lesion. Brain parenchyma appears within normal limits. No intracranial mass or evidence of mass effect. No parenchymal signal abnormality. No restricted diffusion to suggest acute ischemia. No intracranial hemorrhage. The ventricles are within normal limits in size and configuration. Mega cisterna magna is incidentally noted, which is a normal variant. Sella and orbits are grossly within normal limits. Paranasal sinuses and mastoid cells are clear. Bone marrow signal and extracranial soft tissues are within normal limits.
Noncontrast MRI of the brain is within normal limits.