1. Arnaud Dubois

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    1. Mentioned In 22 Articles

    2. Focus defect and dispersion mismatch in full-field optical coherence microscopy

      Focus defect and dispersion mismatch in full-field optical coherence microscopy
      Full-field optical coherence microscopy (FFOCM) is an optical technique, based on low-coherence interference microscopy, for tomographic imaging of semi-transparent samples with micrometer-scale spatial resolution. The differences in refractive index between the sample and the immersion medium of the microscope objectives may degrade the FFOCM image quality because of focus defect and optical dispersion mismatch. These phenomena and their consequences are discussed in this theoretical paper. Experimental methods that have been ...
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    3. A simplified algorithm for digital fringe analysis in two-wave interferometry with sinusoidal phase modulation

      A simplified algorithm for digital fringe analysis in two-wave interferometry with sinusoidal phase modulation
      A compact simplified algorithm for digital detection of the amplitude and phase of the interferometric signal delivered by a two-wave interferometer with sinusoidal phase modulation is presented. The algorithm consists of simple mathematical combinations of four frames obtained by integration by a camera of the time-varying intensity in an interference pattern during the four successive quarters of the modulation period. The algorithm is invariant by circular permutation of the four ...
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    4. Handbook of Full-Field Optical Coherence Microscopy: Technology and Applications (Textbook)

      Handbook of Full-Field Optical Coherence Microscopy: Technology and Applications (Textbook)
      Full-field optical coherence microscopy (FF-OCM) is an imaging technique that provides cross-sectional views of the subsurface microstructure of semitransparent objects. The technology is based on low-coherence interference microscopy, which uses an area camera for en face imaging of the full-field illuminated object. FF-OCM benefits from the lateral imaging resolution of optical microscopy along with the capacity of optical axial sectioning at micrometer-scale resolution. The technique can be employed in diverse ...
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      Mentions: Arnaud Dubois
    5. Complex bifurcation lesions: Randomized comparison of a fully bioresorbable modified t stenting strategy versus bifurcation reconstruction with a dedicated self-expanding stent in combination with bioresorbable scaffolds, an OCT study: Rationale and desig

      Complex bifurcation lesions: Randomized comparison of a fully bioresorbable modified t stenting strategy versus bifurcation reconstruction with a dedicated self-expanding stent in combination with bioresorbable scaffolds, an OCT study: Rationale and desig
      Objective There is an ongoing controversy regarding the efficacy and safety of different percutaneous stenting techniques for coronary bifurcation lesions needing 1 stent. The promise of safe vessel restoration with bioresorbable scaffolds (BRS) may not be transferable to complex double BRS bifurcation techniques, and permanent metallic scaffolding of the bifurcation core may be needed. We identified modified-T stenting as the most promising fully bioresorbable 2-stent strategy in a preclinical setting ...
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    6. Full-field optical coherence microscopy with optimized ultrahigh spatial resolution

      Full-field optical coherence microscopy with optimized ultrahigh spatial resolution
      Full-field optical coherence microscopy (FF-OCM) with isotropic spatial resolution of 0.5 m (in water), at 700 nm center wavelength, is reported. A theoretical study of the FF-OCM axial response is carried out for maximizing the axial resolution of the system, considering the effect of optical dispersion. The lateral resolution is optimized by using water-immersion microscope objectives with a numerical aperture of 1.2. This ultrahigh-resolution FF-OCM system is applied ...
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      Mentions: Arnaud Dubois
    7. Color high resolution full-field optical coherence microscopy for contrast-enhanced imaging

      Color high resolution full-field optical coherence microscopy for contrast-enhanced imaging
      Full-field optical coherence microscopy (FF-OCM) is an established optical technology based on low-coherence interference microscopy for high-resolution non-invasive three-dimensional imaging of semi-transparent samples. We present an extension of the technique setting up an achromatic imaging system over a spectral range extending from 530 nm to 1700 nm, to provide tomographic images in three distinct bands centered at 635 nm, 870 nm and 1170 nm. Image contrast enhancement as well as ...
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      Mentions: Arnaud Dubois
    8. Optical Coherence Tomography Assessment of Coverage of Side Branch Ostium After Implantation of Xience SBA Dedicated Coronary Bifurcation System

      Optical Coherence Tomography Assessment of Coverage of Side Branch Ostium After Implantation of Xience SBA Dedicated Coronary Bifurcation System
      OCT Imaging of the Xience SBA Coronary Bifurcation Stent (A) A cross-section at the entry of the side branch (SB) shows proper strut apposition and optimal scaffolding of the ostium. (B) At the level of the carina, fully apposed stent struts properly span the width of the bifurcation core. From 4 to 8 o'clock, a calcified plaque is visible. (C) In the proximal main vessel (MV), all struts are ...
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    9. Extended full-field optical coherence microscopy

      Extended full-field optical coherence microscopy
      Full-field optical coherence microscopy (FF-OCM) is a recent optical technology based on low-coherence interference microscopy for semi-transparent sample imaging with ~ 1 m spatial resolution. FF-OCM has been successfully applied to three-dimensional imaging of various biological tissues at cellular-level resolution. The contrast of FF-OCM images results from the intensity of light backscattered by the sample microstructures. This contrast mechanism, based on refractive index changes, provides information on the internal architectural morphology ...
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    10. Healing responses after bifurcation stenting with the dedicated TRYTON side-branch StentTM in combination with XIENCE-VTM stents: A clinical, angiography, fractional flow reserve and optical coherence tomography study

      Healing responses after bifurcation stenting with the dedicated TRYTON side-branch StentTM in combination with XIENCE-VTM stents: A clinical, angiography, fractional flow reserve and optical coherence tomography study
      Objectives: We evaluated healing responses with optical coherence tomography (OCT), and clinical and angiographic outcome after bifurcation stenting with the TRYTON Side-Branch StentTM.BackgroundDedicated bifurcation stents have been proposed as a potential alternative for treatment of true coronary bifurcation lesions. MethodsWe treated 20 consecutive patients with coronary bifurcation lesions and significant involvement of the side-branch (SB) with the TRYTON Stent and an additional XIENCE-VTM everolimus-eluting stent. At 9 months, we ...
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    11. Guiding glaucoma laser surgery using Fourier-domain optical coherence tomography at 1.3 μm

      Guiding glaucoma laser surgery using Fourier-domain optical coherence tomography at 1.3 μm
      Glaucoma is a disease of the optic nerve that is usually associated with an increased internal pressure of the eye and can lead to a decreased vision and eventually blindness. It is the second leading cause of blindness worldwide with more than 80 million people affected and approximately 6 million blind. The standard clinical treatment for glaucoma, after unsuccessful administration of eyedrops and other treatments, is performing incisional surgery. However ...
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  2. About Arnaud Dubois

    Arnaud Dubois

    Arnaud Dubois is a Professor at the Institut d'Optique Graduate School in the Lasers et Biophotonique group at the Laboratoire Charles Fabry de l'Institut d'Optique, Universite' Paris-Sud, France