Clinical question: Rule out structural abnormality. Signs and symptoms: Chronic headaches. Nonenhanced brain MRI:No diffusion weighted abnormalities. There is normal anatomical morphology of brain and with normal signal intensity on all MRI sequences.Unremarkable cerebral cortex cortical sulci, ventricular system, CSF spaces and brain myelination.Signal void of major intracranial arterial branches are identified.The signal intensity of intracranial venous sinuses are unremarkable.Unremarkable calvarium, scalp, orbits, paranasal sinuses and mastoid air cells
Unremarkable nonenhanced brain MRI.