Noise Reduction of Swept-Source Optical Coherence Tomography via Compressed Sensing

Luo, Site; Guo, Qiang; Zhao, Hui; An, Xin; Zhou, Liang; Xie, Huikai; Tang, Jianyu; Wang, Xiao; Chen, Hongwei; Huo, Li

doi:10.1109/jphot.2017.2787662

Cited by 6 publications

(8 citation statements)

References 32 publications

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“…(6) Repeat step (3) and use a lower light intensity threshold I 2 to find smaller signals. (7) Repeat steps above until the ε is less than the set value, and then obtain the reconstructed signals a(x c , z ), from which we can get S(x c , k) and S(x c , z ). Figure 2i).…”

Section: Reconstruction Procedures Of 2d Compressive Sensing Interfermentioning

confidence: 99%

“…Compressive sensing SD-OCT (CS-SDOCT) has emerged as an increasingly popular research topic with a view to reducing the imaging time and data volume [5][6][7][8][9]. In our previous works and most other studies on CS-SDOCT, the image is reconstructed using a fraction of the wavenumber k domain 1 G [15].…”

Section: Introductionmentioning

confidence: 99%

“…(2) Repeat steps 1. (2)-(7) to get reconstructed signal a(Q // z ), from which we can get complete spectral matrix S(Q // , k).…”

mentioning

confidence: 99%

“…Sci. 2019,9, x FOR PEER REVIEW 6 of Repeat step (2) for the updated r_n and ( , ') Repeat step (3) and use a lower light intensity threshold I2 to find smaller signals (7). Repeat steps above until the ε is less than the set value, and then obtain the reconstructed signals ( measurement matrix T = Mx F H .…”

mentioning

confidence: 99%

“…Repeat steps 1. (2)-(7) to get reconstructed signal OCT image a (x, z) (step ⑤ shown inFigure 2i).In Step 5, the coordinate transformation formula between the spatial coordinates and the spectral coordinates is Nβ' and dβ' are the number and spacing of the elements of coordinate β', respectively.…”

mentioning

confidence: 99%

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Combination of 2D Compressive Sensing Spectral Domain Optical Coherence Tomography and Interferometric Synthetic Aperture Microscopy

Sun

Guo

et al. 2019

Applied Sciences

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Combining the advantages of compressive sensing spectral domain optical coherence tomography (CS-SDOCT) and interferometric synthetic aperture microscopy (ISAM) in terms of data volume, imaging speed, and lateral resolution, we demonstrated how compressive sampling and ISAM can be simultaneously used to reconstruct an optical coherence tomography (OCT) image. Specifically, an OCT image is reconstructed from two-dimensional (2D) under-sampled spectral data dimension-by-dimension through a CS reconstruction algorithm. During the iterative process of CS algorithm, the deterioration of lateral resolution beyond the depth of focus (DOF) of a Gaussian beam is corrected. In the end, with less spectral data, we can obtain an OCT image with spatially invariant lateral resolution throughout the imaging depth. This method was verified in this paper by imaging the cells of an orange. A 0.7 × 1.5 mm image of an orange was reconstructed using only 50% × 50% spectral data, in which the dispersion of the structure was decreased by approximately 2.4 times at a depth of approximately 5.7 Rayleigh ranges above the focus. This result was consistent with that obtained with 100% data.

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Section: Reconstruction Procedures Of 2d Compressive Sensing Interfermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…(2) Repeat steps 1. (2)-(7) to get reconstructed signal a(Q // z ), from which we can get complete spectral matrix S(Q // , k).…”

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Combination of 2D Compressive Sensing Spectral Domain Optical Coherence Tomography and Interferometric Synthetic Aperture Microscopy

Sun

Guo

et al. 2019

Applied Sciences

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Breathing Dissipative Soliton Molecule Switching in a Bidirectional Mode‐Locked Fiber Laser

Zhou

Ren

Shi

et al. 2022

Advanced Photonics Research

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Breathing optical solitons propagating in a dissipative nonlinear system can interact and bind stably, forming an optical soliton molecule that presents striking molecule‐like dynamics. To date, the breathing soliton pair has been mainly observed in the microcavity platform, and the peculiar dynamic evolution of breathing soliton molecules (BSMs) remains largely unexplored in mode‐locked fiber lasers. Herein, the transient switching dynamics of BSMs in a bidirectional ultrafast fiber laser is revealed, specifically triggered at different parameter spaces of saturable absorption with manipulation polarizations that maintain constant pulse separation or undergo strong repulsion and kink after switching. All‐optical switching of breather molecules and significantly increasing multiple soliton molecules’ switching of two or three solitons between states with different binding separations by applying a strong stimulus with periodic pump modulation is demonstrated. The instantaneous pulse breakup can be induced by the collision of bidirectional breathing solitons in each switching, which is characteristic of the breathing solitons in a bidirectional fiber laser and further corroborated by numerical simulation. The study unveils new perspectives into the ultrafast transient process of BSMs in various dissipative systems.

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Compressive‐sensing swept‐source optical coherence tomography angiography with reduced noise

Wang

Chen

Zhu

et al. 2022

Journal of Biophotonics

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Optical coherence tomography angiography (OCTA), as a functional extension of optical coherence tomography (OCT), has exhibited a great potential to aid in clinical diagnostics. Currently, OCTA still suffers from motion artifact and noise. Therefore, in this article, we propose to implement compressive sensing (CS) on B‐scans to reduce motion artifact by increasing B‐scan rate. Meanwhile, a noise reduction filter is specially designed by combining CS, Gaussian filter and median filter. Specially, CS filtering is realized by averaging multiple CS repetitions on en‐face OCTA images with varied sampling functions. The method is evaluated on in vivo OCTA images of human skin. The results show that vasculature structures can be reconstructed well through CS on B‐scans with a sampling rate of 70%. Moreover, the noise can be significantly eliminated by the developed filter. This implies that our method has a good potential to expedite OCTA imaging and improve the image quality.

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Noise Reduction of Swept-Source Optical Coherence Tomography via Compressed Sensing

Cited by 6 publications

References 32 publications

Combination of 2D Compressive Sensing Spectral Domain Optical Coherence Tomography and Interferometric Synthetic Aperture Microscopy

Combination of 2D Compressive Sensing Spectral Domain Optical Coherence Tomography and Interferometric Synthetic Aperture Microscopy

Breathing Dissipative Soliton Molecule Switching in a Bidirectional Mode‐Locked Fiber Laser

Compressive‐sensing swept‐source optical coherence tomography angiography with reduced noise

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