7 February 2007 Full-field optical coherence tomography image restoration based on Hilbert transformation
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We propose the envelope detection method that is based on Hilbert transform for image restoration in full-filed optical coherence tomography (FF-OCT). The FF-OCT system presenting a high-axial resolution of 0.9 &mgr;m was implemented with a Kohler illuminator based on Linnik interferometer configuration. A 250 W customized quartz tungsten halogen lamp was used as a broadband light source and a CCD camera was used as a 2-dimentional detector array. The proposed image restoration method for FF-OCT requires only single phase-shifting. By using both the original and the phase-shifted images, we could remove the offset and the background signals from the interference fringe images. The desired coherent envelope image was obtained by applying Hilbert transform. With the proposed image restoration method, we demonstrate en-face imaging performance of the implemented FF-OCT system by presenting a tilted mirror surface, an integrated circuit chip, and a piece of onion epithelium.
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Jihoon Na, Jihoon Na, Woo June Choi, Woo June Choi, Eun Seo Choi, Eun Seo Choi, Seon Young Ryu, Seon Young Ryu, Byeong Ha Lee, Byeong Ha Lee, } "Full-field optical coherence tomography image restoration based on Hilbert transformation", Proc. SPIE 6429, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XI, 64292U (7 February 2007); doi: 10.1117/12.702266; https://doi.org/10.1117/12.702266

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