OCTt

OCTt, also known as Optical Coherence Tomography angiography, is a non-invasive imaging technique used to visualize and analyze blood flow in the retina and choroid. It is a specialized application of Optical Coherence Tomography (OCT), which uses light waves to create cross-sectional images of the eye's tissue. OCTa builds upon standard OCT by detecting the movement of red blood cells within the vasculature. This allows for the creation of detailed maps of the retinal and choroidal blood vessels without the need for intravenous contrast agents, which are typically used in traditional angiography.

The principle behind OCTa involves analyzing subtle shifts in the OCT signal that occur as blood flows through the vessels. By processing multiple OCT scans taken at the same location, the system can differentiate between static tissue and moving blood. This results in an image that highlights the vascular network in different layers of the retina. OCTa is particularly valuable for diagnosing and monitoring a range of retinal diseases that affect blood vessels, such as diabetic retinopathy, age-related macular degeneration (AMD), and retinal vein occlusions. Its ability to visualize microvascular changes at an early stage can aid in timely intervention and improve patient outcomes.