OCT angiography (OCTA) is an advanced imaging technique that allows clinicians to visualize blood flow in the retina and choroid without the need for dye injection.
Unlike traditional angiography, OCTA uses motion contrast from repeated OCT scans to map vascular structures in detail.
OCTA captures multiple OCT scans at the same location and detects changes caused by moving blood cells.
This allows the system to:
Result: high-resolution imaging of retinal and choroidal vasculature
| Feature | OCT Angiography (OCTA) | Fluorescein Angiography (FA) |
|---|---|---|
| Dye Required | No | Yes |
| Invasiveness | Non-invasive | Invasive |
| Imaging Speed | Fast | Slower |
| Depth Resolution | Layer-by-layer | Limited |
| Leakage Detection | Limited | Strong |
Many modern OCT systems now include OCTA, but availability depends on configuration and model.
What is OCT angiography?
OCT angiography is a non-invasive imaging technique that visualizes blood flow in the retina using optical coherence tomography.
Is OCTA better than fluorescein angiography?
OCTA is safer and faster, but fluorescein angiography is still better for detecting leakage.
What diseases can OCTA detect?
OCTA is used for conditions like AMD, diabetic retinopathy, and retinal vascular disorders.
Do all OCT machines have OCTA?
No, OCTA is available on specific models such as Topcon Triton and ZEISS Cirrus AngioPlex systems.
We help clinics source OCT systems with OCT angiography capabilities worldwide.
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