An X-ray examination which images the air-filled cavities in the frontal bones on the skull that are lined with a mucous membrane . X-rays are a form of electromagnetic radiation (like light); they are of higher energy, however, and can penetrate the body to form an image on film. Structures that are dense (such as bone) will appear white, air will be black, and other structures will be shades of gray.

Alternative Names

Paranasal sinus radiography; X-ray - sinuses