OCT
Also written as: OCT — Optical coherence tomography
High-resolution intravascular imaging technique using near-infrared light to create detailed cross-sectional vessel images.
Full Definition
Optical coherence tomography (OCT) is an intravascular imaging modality that uses near-infrared light to generate high-resolution, cross-sectional images of arterial walls and luminal contents. OCT provides superior resolution compared to IVUS (10-15 μm vs 100-200 μm) allowing detailed visualization of tissue microstructure, thin-cap fibroatheromas, plaque erosion, and thrombus. The technique requires blood clearance during image acquisition, typically achieved through contrast injection or balloon occlusion. OCT is particularly valuable for assessing stent deployment, detecting edge dissections, measuring neointimal coverage, and identifying high-risk plaque features. Its exceptional resolution makes it the gold standard for evaluating stent strut apposition and tissue coverage.
Usage
Usage note: Always capitalized. May be distinguished from ophthalmic OCT by context or specified as 'intravascular OCT'.
In Context
- "OCT revealed incomplete stent strut apposition requiring post-dilation." — Intervention optimization report
- "The thin-cap fibroatheroma was clearly visualized on OCT imaging." — Research study documentation