OCT angiography (OCTA) is a non-invasive imaging technology used to visualize blood flow in the retina and choroid without the need for dye injection.
By detecting motion from red blood cells, OCTA creates detailed, layer-by-layer maps of retinal vasculature.
OCTA captures multiple OCT scans at the same location and compares them to detect movement within blood vessels.
This allows clinicians to:
Result: fast, repeatable vascular imaging
| Feature | OCTA | Fluorescein Angiography |
|---|---|---|
| Dye Injection | No | Yes |
| Invasiveness | Non-invasive | Invasive |
| Speed | Fast | Slower |
| Layer Detail | High (depth-resolved) | Limited |
| Leakage Detection | Limited | Strong |
Not all OCT systems include OCTA — it depends on model and configuration.
What is OCT angiography?
OCT angiography is a non-invasive imaging technique that maps blood flow in the retina using OCT technology.
Is OCTA better than fluorescein angiography?
OCTA is safer and faster, but fluorescein angiography remains better for detecting leakage.
What diseases can OCTA detect?
AMD, diabetic retinopathy, and retinal vascular disorders.
Do all OCT machines have OCTA?
No, OCTA is available on specific systems such as Topcon Triton and ZEISS Cirrus AngioPlex.
We help clinics source OCT systems with OCT angiography worldwide.
Upgrading your OCT? We help clinics recover value from existing systems.
Looking for more information about OCT Systems? Check out our other resources.
