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Dual Axis Optical Coherence Interferometry (DA-OCT) is a derivative of optical toherence tomography (OCT) capable of collecting low-order scattered photons to achieve greater depth range than traditional OCT. The general principles of DA-OCT arise from the tendency for multiple scattered photons to emerge further away from the illumiation path than ballistic photons. While OCT is capable of achieving high resolution images, it is limited to only image superficial layers of tissue due to its limited penetration depth.