What is an Fluorescein Angiography?
Fluorescein angiography is a diagnostic imaging technique used to visualize the blood vessels in the retina and the choroid, the layer of blood vessels underneath the retina. This procedure involves injecting a fluorescent dye called fluorescein into the bloodstream. The dye travels through the retinal blood vessels and highlights any abnormalities, allowing for detailed assessment of retinal health.
What Can Fluorescein Angiography Help to Diagnose?
Fluorescein angiography is particularly useful for diagnosing and managing a variety of retinal conditions, including:
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- Diabetic Retinopathy: Detects leakage from blood vessels, areas of ischemia (lack of blood flow), and abnormal vessel growth associated with diabetes.
- Age-Related Macular Degeneration (AMD): Identifies areas of neovascularization (new blood vessel growth) and fluid leakage in the macula.
- Retinal Vein Occlusion: Shows patterns of blood flow disruption and leakage caused by blockages in the retinal veins.
- Macular Edema: Assesses the extent of fluid accumulation in the macula, which can affect central vision.
- Retinal Tears and Detachments: Helps identify abnormal blood vessel growth and other changes that could indicate retinal tears or detachments.
How is Fluorescein Angiography Performed?
The procedure for fluorescein angiography involves several steps:
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- Injection: A fluorescein dye is injected into a vein in your arm or hand. The dye quickly travels to the blood vessels in the eye.
- Photography: Using a special camera equipped with filters, a series of rapid photographs are taken of the retina as the dye circulates through the blood vessels.
- Image Analysis: The images are analyzed to assess blood flow and identify any abnormalities, such as leakage, blockages, or abnormal blood vessel growth.
What are the Benefits of Fluorescein Angiography?
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- Detailed Visualization: Provides clear images of the retinal blood vessels and choroid, allowing for precise diagnosis and treatment planning.
- Early Detection: Helps in the early detection of retinal diseases and conditions, which can improve treatment outcomes.
- Comprehensive Assessment: Useful for assessing the extent of retinal damage and monitoring the effectiveness of treatments over time.
Learn more about FAs
Cleveland Clinic. Fluorescein Angiography
American Academy of Ophthalmology. What is Fluorescein Angriography?
