1. Articles from Sylvain Gigan

    1-2 of 2
    1. Single myelin fiber imaging in living rodents without labeling by deep optical coherence microscopy

      Single myelin fiber imaging in living rodents without labeling by deep optical coherence microscopy
      Myelin sheath disruption is responsible for multiple neuropathies in the central and peripheral nervous system. Myelin imaging has thus become an important diagnosis tool. However, in vivo imaging has been limited to either low-resolution techniques unable to resolve individual fibers or to low-penetration imaging of single fibers, which cannot provide quantitative information about large volumes of tissue, as required for diagnostic purposes. Here, we perform myelin imaging without labeling and at micron-scale resolution with >300-μm penetration depth on living rodents. This was achieved with a prototype [termed deep optical coherence microscopy (deep-OCM)] of a high-numerical aperture infrared full-field optical coherence ...
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    2. Brain refractive index measured in vivo with high-NA defocus-corrected full-field OCT and consequences for two-photon microscopy

      Brain refractive index measured in vivo with high-NA defocus-corrected full-field OCT and consequences for two-photon microscopy
      Two-photon laser scanning microscopy (2PLSM) is an important tool for in vivo tissue imaging with sub-cellular resolution, but the penetration depth of current systems is potentially limited by sample-induced optical aberrations. To quantify these, we measured the refractive index n' in the somatosensory cortex of 7 rats in vivo using defocus optimization in full-field optical coherence tomography (ff-OCT). We found n' to be independent of imaging depth or rat age. From these measurements, we calculated that two-photon imaging beyond 200µm into the cortex is limited by spherical aberration, indicating that adaptive optics will improve imaging depth.
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    1-2 of 2
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    1. (2 articles) ESPCI ParisTech
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    Brain refractive index measured in vivo with high-NA defocus-corrected full-field OCT and consequences for two-photon microscopy Single myelin fiber imaging in living rodents without labeling by deep optical coherence microscopy Dual spectrometer system with spectral compounding for 1-μm optical coherence tomography in vivo Differentiating untreated and cross-linked porcine corneas of the same measured stiffness with optical coherence elastography Miniaturized endoscopic probe for optical coherence tomography with a tiny magnet driving device Detection and analysis of multi-dimensional pulse wave based on optical coherence tomography Development of Tissue Characterization Using Optical Coherence Tomography for Defining Coronary Plaque Morphology and the Vascular Responses After Coronary Stent Implantation Microscale imaging of cilia-driven fluid flow Choroidal thickness measurement by enhanced depth imaging and swept-source optical coherence tomography in central serous chorioretinopathy Effect of Atorvastatin Therapy on Fibrous Cap Thickness in Coronary Atherosclerotic Plaque as Assessed by Optical Coherence Tomography The EASY-FIT Study Application of anterior segment optical coherence tomography to identify eyes with posterior polar cataract at high risk for posterior capsule rupture Measurement of a multi-layered tear film phantom using optical coherence tomography and statistical decision theory