Optical coherence tomography oct is an imaging technique that uses low coherence light to capture micrometer resolution two and three dimensional images from within optical scattering media eg biological tissue it is used for medical imaging and industrial nondestructive testing ndt optical coherence tomography is based on low coherence interferometry typically employing near . Optical coherence tomography oct is a non invasive imaging test that uses light waves to take cross section pictures of your retina the light sensitive tissue lining the back of the eye. Optical coherence tomography oct is a relatively newer method of assessing arterial anatomy using an imaging catheter instead of sound waves as used in ivus oct uses near infrared light to image arterial anatomy. A technique called optical coherence tomography oct has been developed for noninvasive cross sectional imaging in biological systems oct uses low coherence interferometry to produce a