Optical coherence tomography (OCT) is an emerging optical imaging technology that performs
high-resolution, cross-sectional tomographic imaging of internal structure in biological systems and
materials [1]. OCT is analogous to ultrasound B mode imaging except that it uses light instead of sound.
Image resolutions of 1–15 μm can be achieved, over one order of magnitude higher than conventional
ultrasound. OCT performs imaging by measuring the echo time delay and intensity of backscattered light
from internal microstructure in the tissue. In biomedicine, OCT can function as a type of optical biopsy,yielding information on tissue pathology in situ and in real time, without the need for excision of specimens
and processing as in conventional biopsy and histopathology [2–4].