Role of Computed Tomography and Magnetic Resonance Imaging in the Evaluation of Headache Due to Paranasal Sinus and Teeth Disorder.

When brain imaging is performed as a first-line investigation for headaches and no intracranial abnormality is found, attention should always be paid to potential non-CNS causes of headache including paranasal sinus inflammatory, infectious, and occasionally malignant disease, and also to odontogenic sinusitis. Non-enhanced CT (NECT) head offers an initial evaluation of these areas which may be an unexpected source of symptomatology. Further imaging may then be required with either dedicated sinus NECT [particularly if surgical intervention is necessary for paranasal sinus disease], a contrast-enhanced (CECT) head and sinus CT, or an MRI if intracranial complications of sinonasal disease or acute invasive fungal sinusitis is suspected.
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