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5 March 2021 Resolution-enhanced optical coherence tomography enabled by coherent-average noise suppression
Nichaluk Leartprapun, Steven G. Adie
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Proceedings Volume 11630, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV; 1163011 (2021) https://doi.org/10.1117/12.2583863
Event: SPIE BiOS, 2021, Online Only
Abstract
We demonstrate resolution-enhanced optical coherent tomography (RE-OCT) via coherent averaging and computational spatial bandwidth expansion. RE-OCT leverages coherent average of the complex OCT signal across multiple acquisitions to suppress noise. The enhanced sensitivity accommodates expansion of spatial bandwidth via multiplication with a spatial-frequency mask. We achieved resolution enhancement of 1.5 times with 40 acquisitions, without sacrificing signal-to-background ratio of single-shot image, in silicone phantom. In collagen, RE-OCT revealed collagen fiber structures that were not resolvable in single-shot or coherent-averaged image. RE-OCT demonstrates an added flexibility to existing image improvement techniques in coherent imaging—resolution, in addition to contrast, enhancement.
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Nichaluk Leartprapun and Steven G. Adie "Resolution-enhanced optical coherence tomography enabled by coherent-average noise suppression", Proc. SPIE 11630, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV, 1163011 (5 March 2021); https://doi.org/10.1117/12.2583863
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KEYWORDS
Optical coherence tomography
Image enhancement
Spatial frequencies
Collagen
Interference (communication)
Resolution enhancement technologies
Signal to noise ratio
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