Clinical question: Patient with increasing headache and vertigo, evaluate for structural cause. Signs and symptoms: Headache and vertigo. Nonenhanced brain MRI:No diffusion weighted abnormalities.The anatomical morphology and signal intensity to brain parenchyma is within normal on all MRI sequences.Unremarkable surgical cortex, cortical sulci, ventricular system, CSF spaces and brain myelination.Signal void of intracranial arterial branches are identified. The signal intensity of intracranial venous sinuses are unremarkable.Unremarkable calvarium, soft tissues of the scalp, orbits, paranasal sinuses and mastoid air cells.
1.Unremarkable nonenhanced brain MRI.2.Normal signal intensity of paranasal sinuses and mastoid air cells.