optical coherence tomography
Also written as: OCT — Optical Coherence Tomography
A high-resolution intravascular imaging technique using light waves to visualize coronary artery microstructure.
Full Definition
Optical coherence tomography (OCT) is an advanced catheter-based imaging modality that uses near-infrared light to generate extremely high-resolution cross-sectional images of coronary arteries. OCT provides superior resolution compared to intravascular ultrasound, enabling detailed visualization of plaque characteristics, stent strut coverage, and vessel wall microstructure. The technique requires temporary blood displacement during image acquisition, typically achieved through contrast injection or saline flush. OCT is particularly valuable for assessing stent optimization, detecting edge dissections, and characterizing vulnerable plaque features in research and clinical applications.
Usage
Usage note: OCT abbreviation widely used in interventional cardiology. Distinguish from ophthalmic OCT in mixed medical contexts.
In Context
- "Optical coherence tomography revealed incomplete stent strut apposition requiring post-dilation." — Interventional procedure report
- "The research protocol included optical coherence tomography to assess neointimal coverage at follow-up." — Clinical trial methodology