title: Two-level optical coherence tomography scheme for suppressing spectral saturation artifacts.
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.
authors: Graduate Institute of Medical Mechatronics, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan 33302, Taiwan. CTWu@mail.cgu.edu.tw.
authors: Chiung-Ting
authors: CT
authors: Wu
authors: Department of Electrical Engineering, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan 33302, Taiwan. mttsai@mail.cgu.edu.tw.
authors: Meng-Tsan
authors: MT
authors: Tsai
authors: Graduate Institute of Medical Mechatronics, Chang Gung University, 259, Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan 33302, Taiwan. ChengKuangLee@mail.cgu.edu.tw.
authors: Cheng-Kuang
authors: CK
authors: Lee
mesh_terms: D000465:Algorithms; D016477:Artifacts; D005385:Fingers / Q000502:physiology; D005583:Fourier Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D059629:Signal-To-Noise Ratio; D041623:Tomography, Optical Coherence / Q000379:methods*