Since its invention in the late 1980s [1–4] and early 1990s [5–7], the original idea of OCT was to enable noninvasive optical biopsy, i.e., the in situ imaging of tissue microstructure with a resolution approaching that of histology, but without the need for tissue excision and post-processing. An important advance toward this goal was the introduction of ultrahigh-resolution OCT (UHR OCT). By improving axial OCT resolution by one order of magnitude from the 10 to 15 μm to the sub-μm region [8–11], UHR OCT enables superior visualization of tissue microstructure, including all major intraretinal layers in ophthalmic applications as well as cellular resolution OCT imaging in nontransparent tissue. This chapter reviews state-of-the-art technology that enables ultrahigh-resolution OCT covering the entire wavelength region from 500 to 1,600 nm and discusses fundamental limitations of OCT image resolution.
CITATION STYLE
Drexler, W., Chen, Y., Aguirre, A. D., Považay, B., Unterhuber, A., & Fujimoto, J. G. (2015). Ultrahigh resolution optical coherence tomography. In Optical Coherence Tomography: Technology and Applications, Second Edition (pp. 277–318). Springer International Publishing. https://doi.org/10.1007/978-3-319-06419-2_9
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