1. Articles from Xavier Attendu

    1-4 of 4
    1. Coregistered optical coherence tomography and frequency-encoded multispectral imaging for spectrally sparse color imagingv

      Coregistered optical coherence tomography and frequency-encoded multispectral imaging for spectrally sparse color imagingv

      We present a system combining optical coherence tomography (OCT) and multispectral imaging (MSI) for coregistered structural imaging and surface color imaging. We first describe and numerically validate an optimization model to guide the selection of the MSI wavelengths and their relative intensities. We then demonstrate the integration of this model into an all-fiber bench-top system. We implement frequency-domain multiplexing for the MSI to enable concurrent acquisition of both OCT and MSI at OCT acquisition rates. Such a system could be implemented in endoscopic practices to provide multimodal, high-resolution imaging of deep organ structures that are currently inaccessible to standard video ...

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    2. Simple and robust calibration procedure for k-linearization and dispersion compensation in optical coherence tomography

      Simple and robust calibration procedure for k-linearization and dispersion compensation in optical coherence tomography

      In Fourier-domain optical coherence tomography (FD-OCT), proper signal sampling and dispersion compensation are essential steps to achieve optimal axial resolution. These calibration steps can be performed through numerical signal processing, but require calibration information about the system that may require lengthy and complex measurement protocols. We report a highly robust calibration procedure that can simultaneously determine correction vectors for nonlinear wavenumber sampling and dispersion compensation. The proposed method requires only two simple mirror measurements and no prior knowledge about the system’s illumination source or detection scheme. This method applies to both spectral domain and swept-source OCT systems. Furthermore, it ...

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    3. Combined optical coherence tomography and hyperspectral imaging using a double-clad fiber coupler

      Combined optical coherence tomography and hyperspectral imaging using a double-clad fiber coupler

      This work demonstrates the combination of optical coherence tomography (OCT) and hyperspectral imaging (HSI) using a double-clad optical fiber coupler. The single-mode core of the fiber is used for OCT imaging, while the inner cladding of the double-clad fiber provides an efficient way to capture the reflectance spectrum of the sample. The combination of both methods enables three-dimensional acquisition of the sample morphology with OCT, enhanced with complementary molecular information contained in the hyperspectral image. The HSI data can be used to highlight the presence of specific molecules with characteristic absorption peaks or to produce true color images overlaid on ...

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    4. Combined optical coherence tomography and hyper-spectral imaging using a double clad fiber coupler

      Combined optical coherence tomography and hyper-spectral imaging using a double clad fiber coupler

      This proceedings shows the combination of Optical Coherence Tomography (OCT) and Hyper-Spectral Imaging (HSI) using a double-clad optical fiber. The single mode core of the fiber is used to transmit OCT signals, while the cladding, with its large collection area, provides an efficient way to capture the reflectance spectrum of the sample. The combination of both methods enables three-dimensional acquisition of sample morphology with OCT, enhanced by the molecular information contained in its hyper-spectral image. We believe that the combination of these techniques could result in endoscopes with enhanced tissue identification capability

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    1-4 of 4
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  2. Topics in the News

    1. (4 articles) Polytechnique Montreal
    2. (3 articles) Caroline Boudoux
    3. (3 articles) National Institutes of Health
    4. (2 articles) Stanford University
    5. (2 articles) Audrey K. Bowden
    6. (2 articles) Harvard University
    7. (1 articles) Academic Medical Center at the University of Amsterdam
    8. (1 articles) Dirk J. Faber
    9. (1 articles) Ton G. van Leeuwen
    10. (1 articles) Castor Optics
    11. (1 articles) Texas A&M University
    12. (1 articles) FDA
    13. (1 articles) University of Southern California
    14. (1 articles) Dresden University of Technology
    15. (1 articles) Francesco Prati
    16. (1 articles) Edmund Koch
    17. (1 articles) Lars Kirsten
    18. (1 articles) Javier A. Jo
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    Combined optical coherence tomography and hyper-spectral imaging using a double clad fiber coupler Combined optical coherence tomography and hyperspectral imaging using a double-clad fiber coupler Simple and robust calibration procedure for k-linearization and dispersion compensation in optical coherence tomography Coregistered optical coherence tomography and frequency-encoded multispectral imaging for spectrally sparse color imagingv Medical treatment of inflammatory punctual stenosis monitored by anterior segment optical coherence tomography Development and Validation of a Deep Learning System for Diagnosing Glaucoma Using Optical Coherence Tomography Methylene blue-filled biodegradable polymer particles as a contrast agent for optical coherence tomography Optical coherence tomography for thyroid pathology: 3D analysis of tissue microstructure Mathematical Analysis of Texture Indicators for the Segmentation of Optical Coherence Tomography Images Comparison of Current Optical Coherence Tomography Angiography Methods in Imaging Retinal Hemangioblastomas New findings useful for clinical practice using swept-source optical coherence tomography angiography in the follow-up of active ocular toxoplasmosis Ultrafast-laser ablation of polymer multicore fibers enhances biomedical sensing