17 February 2017 High contrast and polarization-artifact-free optical coherence tomography by maximum a-posteriori estimation
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Abstract
We propose a maximum a-posteriori (MAP) intensity estimator to improve the image contrast of polarization diversity (PD)-OCT imaging to achieve high contrast polarization-artifact-free images. The MAP estimator compensates for the inevitable reduction of signal-to-noise ratio (SNR) in PD-OCT caused by the splitting of power into two polarization detection channels. It also has low noise-offset in low intensity regions such as the vitreous. This method is applied to posterior eye images, and shows high-contrast, polarization-artifact-free images. This method also enables attenuation coefficient imaging with finer differentiation of attenuation levels.
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Aaron C. Chan, Young-Joo Hong, Shuichi Makita, Masahiro Miura, Yoshiaki Yasuno, "High contrast and polarization-artifact-free optical coherence tomography by maximum a-posteriori estimation", Proc. SPIE 10053, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXI, 100532D (17 February 2017); doi: 10.1117/12.2250517; https://doi.org/10.1117/12.2250517
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