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Sensors 2014, 14(8), 13548-13555; doi:10.3390/s140813548

Two-Level Optical Coherence Tomography Scheme for Suppressing Spectral Saturation Artifacts

1
Graduate Institute of Medical Mechatronics, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan 33302, Taiwan
2
Department of Electrical Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan 33302, Taiwan
*
Author to whom correspondence should be addressed.
Received: 12 June 2014 / Revised: 15 July 2014 / Accepted: 23 July 2014 / Published: 25 July 2014
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [5677 KB, uploaded 25 July 2014]   |  

Abstract

We demonstrate a novel method for reducing saturation artifacts in spectral-domain optical coherence tomography (SD-OCT) systems. This method is based on a two-level SD-OCT system with a dual-line charge-coupled device (CCD) camera. We compensate the saturated signal detected by the first line using the unsaturated signal detected by the second line. The Fourier transform of the compensated spectrum shows effective suppression of saturation artifacts. This method was also successfully performed on phantom material and skin on a human finger. Our method causes neither back-scattering power loss nor signal-to-noise ratio (SNR) degradation. The only difference between the traditional system and our two-level system is our utilization of the dual-line CCD camera; no additional devices or complex designs are needed. View Full-Text
Keywords: OCT; noise in imaging system; real-time OCT; noise in imaging system; real-time
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Wu, C.-T.; Tsai, M.-T.; Lee, C.-K. Two-Level Optical Coherence Tomography Scheme for Suppressing Spectral Saturation Artifacts. Sensors 2014, 14, 13548-13555.

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