OCT
Also written as: OCT — Optical Coherence Tomography
High-resolution intravascular imaging modality using near-infrared light to assess coronary vessel wall morphology and stent deployment.
Full Definition
Optical coherence tomography (OCT) is an advanced intravascular imaging technique that utilizes near-infrared light to provide high-resolution, cross-sectional images of coronary arteries. With axial resolution of 10-15 micrometers, OCT offers superior detail compared to IVUS for assessing plaque morphology, stent strut apposition, tissue coverage, and vessel healing. The technique requires temporary vessel occlusion and contrast injection for blood clearance, limiting imaging time but providing exceptional visualization of superficial vessel wall structures. OCT is particularly valuable for optimizing stent deployment and identifying complications such as edge dissection or incomplete strut apposition.
Usage
Usage note: Distinguish from optical coherence tomography in ophthalmology by specifying intravascular context.
In Context
- "OCT imaging revealed incomplete stent strut apposition requiring additional balloon inflation." — Interventional procedure note
- "The protocol specified OCT guidance for all complex left main interventions." — Clinical trial methodology