Video angiography records dynamic sequences of angiographic images, such as fluorescein or indocyanine green studies, to capture real-time blood flow in ocular vessels. It allows detailed review of filling patterns and leakage over time.
Technique
After dye injection, a high-speed camera or digital system continuously acquires frames as the dye passes through the retinal and choroidal circulation. The resulting video can be paused, replayed, or analysed frame by frame.
- Shows arterial, venous, and late phases in motion
- Helps identify transient phenomena that single images might miss
- Digital storage facilitates comparison at later visits
- Can be combined with image processing to enhance contrast and measurement
Clinical Use
Video angiography improves assessment of neovascular membranes, vascular occlusions, and leakage sites by displaying temporal as well as spatial information. It supports precise planning of treatments such as laser or targeted injections.
- Useful in complex macular and choroidal conditions
- Helps distinguish between rapid and slow filling lesions
- Provides teaching material for training and multidisciplinary discussion
- Interpreted alongside static images, OCT, and clinical findings
