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Published on: November 19, 2012
Computation time-saving mirror image suppression method in Fourier-domain optical coherence tomography
Chiung-Ting Wu1, Ting-Ta Chi, Yean-Woei Kiang
1Institute of Photonics and Optoelectronics, Department of Electrical Engineering, and Center for Emerging Material and Advanced Devices, National Taiwan University, 1, Roosevelt Road, Section 4, Taipei 10617, Taiwan.
Optics Express
|April 20, 2012
Summary
This study introduces a faster method for suppressing mirror images in Fourier-domain optical coherence tomography. The technique improves image quality and significantly reduces computation time compared to existing methods.
Area of Science:
- Optical Coherence Tomography
- Image Processing
- Metrology
Background:
- Fourier-domain optical coherence tomography (FD-OCT) is susceptible to mirror image artifacts.
- These artifacts degrade the quality of real image signals, complicating analysis.
- Existing methods like BM-scan can be computationally intensive.
Purpose of the Study:
- To develop and demonstrate a novel, time-saving method for mirror image suppression in FD-OCT.
- To improve the quality of real image signals by effectively differentiating them from mirror images.
- To evaluate the performance of the new method against established techniques.
Main Methods:
- Utilized the reversed system phase shift property between real and mirror images.
- Solved a set of two equations with a reasonable approximation to isolate the real image signal.
- Investigated the impact of iteration numbers and system phase shifts on suppression ratios.
- Compared the method's performance with the BM-scan technique.
Main Results:
- The proposed method effectively suppresses mirror images, enhancing real image quality.
- Two iterations of the process yielded superior mirror image suppression compared to BM-scan.
- Demonstrated significantly reduced computation time compared to the BM-scan technique.
- Evaluated suppression ratios under various processing conditions.
Conclusions:
- The developed method offers a computationally efficient and effective solution for mirror image suppression in FD-OCT.
- It provides improved real image quality and suppression performance, especially with iterative processing.
- This technique presents a valuable advancement for FD-OCT applications requiring faster processing and higher fidelity images.
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