What is the source used to obtain an Optical Coherence Tomography image?

Optical Coherence Tomography (OCT) is a non-invasive imaging technique that uses light waves to capture high-resolution images from within the tissue, primarily in the eye. The technology relies on the interference of light beams to create cross-sectional images, similar to how ultrasound uses sound waves to do so, but at a much finer resolution.

High-resolution imaging is a defining feature of OCT, allowing for detailed visualization of the retinal layers and other biological tissues. This capability is crucial in diagnosing and monitoring various ocular conditions, including macular degeneration and glaucoma.

The other options, like ultrasound, X-ray imaging, and CT scans, utilize different methods and principles for imaging that do not align with the optical technique used in OCT. Understanding this distinction underscores why high-resolution imaging is pivotal to the function and application of Optical Coherence Tomography.