optical coherence tomography
High-resolution intravascular imaging technique using near-infrared light to visualize vessel wall microstructure.
Full Definition
Optical coherence tomography (OCT) is an advanced intravascular imaging modality that employs near-infrared light to generate extremely high-resolution cross-sectional images of blood vessels. With resolution approaching 10-15 micrometers, OCT provides superior detail of vessel wall architecture compared to IVUS, allowing visualization of thin fibrous caps, lipid pools, and other plaque characteristics. This technology is particularly valuable in assessing vulnerable plaques, guiding stent placement, and evaluating procedural outcomes in coronary interventions.
Usage
Usage note: Commonly abbreviated as OCT; requires blood displacement during imaging.
In Context
- "Optical coherence tomography revealed a thin-cap fibroatheroma with a 50-micron fibrous cap." — Interventional cardiology report
- "OCT imaging confirmed complete stent apposition against the vessel wall." — Post-procedural assessment note