optical coherence tomography
Also written as: OCT — optical coherence tomography
High-resolution intravascular imaging technique using near-infrared light to visualize arterial 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 arterial walls with resolution approaching 10-20 micrometers. This catheter-based technique provides superior detail of plaque morphology, fibrous cap thickness, and stent strut apposition compared to conventional imaging methods. OCT is particularly valuable for identifying vulnerable plaque characteristics such as thin fibrous caps, lipid pools, and macrophage infiltration. The technology requires temporary blood displacement using contrast or saline flush during image acquisition, limiting imaging duration but enabling unprecedented visualization of coronary microstructure.
Usage
Usage note: Commonly abbreviated as OCT; distinguish from ophthalmic OCT applications.
In Context
- "Optical coherence tomography revealed incomplete stent strut apposition in the proximal segment." — Post-intervention assessment
- "The optical coherence tomography images showed a thin fibrous cap overlying a large lipid core." — Vulnerable plaque evaluation