Imaging for headache: what the neuroradiologist looks for.

In this article, computed tomography and magnetic resonance imaging anatomy and pathology of sinus disease is discussed, specifically relating to facial pain, rhinogenic headache, and sinus outflow obstruction. Findings commonly seen in acute, chronic, infectious, and inflammatory sinusitis are illustrated, with additional examples of secondary intracranial and orbital involvement, and more aggressive infectious and neoplastic processes.