OCT-A
Also written as: OCT-A — Optical Coherence Tomography Angiography
Optical coherence tomography angiography, a non-invasive imaging technique for visualizing retinal and choroidal blood flow.
Full Definition
Optical coherence tomography angiography (OCT-A) is an advanced imaging modality that uses motion contrast to generate detailed maps of retinal and choroidal vasculature without requiring intravenous dye injection. The technology detects moving red blood cells to create high-resolution angiographic images at different retinal layers, including the superficial and deep capillary plexes. OCT-A has revolutionized the diagnosis and monitoring of retinal diseases such as diabetic retinopathy, age-related macular degeneration, and retinal vascular occlusions by providing quantitative analysis of vessel density and perfusion patterns.
Usage
Usage note: May be written as OCT-A, OCTA, or OCT angiography. Hyphenated form preferred in formal medical writing.
In Context
- "OCT-A revealed decreased vessel density in the deep capillary plexus." — Imaging report
- "The OCT-A findings confirmed the presence of choroidal neovascularization." — Diagnostic assessment