coronary artery calcium density
The intensity of calcium deposits in coronary arteries measured by CT, expressed in Hounsfield units. Higher density indicates more mature, stable plaque.
Full Definition
Coronary artery calcium density refers to the radiographic density of calcified coronary plaque measured during cardiac CT scanning, typically expressed in Hounsfield units (HU). Dense calcium (>400 HU) suggests mature, stable atherosclerotic plaque, while lower density calcium may indicate more active calcification processes. This parameter complements the total calcium score by providing qualitative information about plaque characteristics. Some studies suggest that calcium density, independent of total volume, may have prognostic implications for cardiovascular events.
Usage
Usage note: Often reported alongside but distinct from total calcium score.
In Context
- "The patient's coronary artery calcium density was 450 HU, suggesting mature calcified plaque." — Radiology report
- "Recent studies examine whether calcium density provides incremental prognostic value beyond traditional calcium scoring." — Research publication