Radiolucency
Pronunciation: ray-dee-oh-LOO-sen-see
An area on a radiographic image that appears darker than surrounding structures, indicating lower X-ray attenuation typically associated with soft tissue, air, or pathological lesions.
Full Definition
In dental radiology, a radiolucency is a dark or black area on a radiographic image resulting from the relative ease with which X-rays pass through a given tissue or space, producing less exposure on the receptor. Common dental radiolucencies include carious lesions, periapical abscesses, cysts, and the pulp chamber. Editors must apply this term precisely and distinguish it from its antonym 'radiopacity.' The adjective form is 'radiolucent,' and editors should ensure consistent use of noun versus adjective forms within a document. The term is never hyphenated.
Usage
Usage note: Use 'radiolucency' as the noun and 'radiolucent' as the adjective. Do not use interchangeably with 'radiopacity,' which is the opposite phenomenon.
In Context
- "A well-defined radiolucency was observed at the apex of tooth 21, suggestive of a periapical granuloma." — Dental radiology report
- "The periapical radiolucency had increased in size compared with the previous radiograph taken six months prior." — Follow-up clinical notes