1. Yimin Wang

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    1. Mentioned In 20 Articles

    2. Rapid measurement of transversal flow velocity vector with high spatial resolution using speckle decorrelation optical coherence tomography

      Rapid measurement of transversal flow velocity vector with high spatial resolution using speckle decorrelation optical coherence tomography
      We propose and demonstrate a novel method that uses only three sets of B-scans to accurately determine both the direction and the speed of a transversal flow using speckle decorrelation optical coherence tomography. Our tri-scan method has the advantages of high measurement speed, high spatial resolution, and insensitivity to the flow speed. By introducing error maps, we show that the flow angle inaccuracy can be minimized by choosing the measurement ...
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    3. Optimization of the Source Power Usage in Spectral Domain Optical Coherence Tomography

      Optimization of the Source Power Usage in Spectral Domain  Optical Coherence Tomography
      Source power consumption and system sensitivity of a spectrometer based optical coherence tomography (SD-OCT) system are investigated. Our study shows that the performance of SD-OCT system can be classified into two categories based on the beam splitting ratio R between the sample and reference rams in the Michelson interferometer. For the classic SD-OCT configuration, R is less than 1.0, and improvement of sample light collection efficiency through reducing R ...
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    4. Two-dimensional phase unwrapping in Doppler Fourier domain optical coherence tomography

      Two-dimensional phase unwrapping in Doppler Fourier domain optical coherence tomography
      For phase-related imaging modalities using interferometric techniques, it is important to develop effective method to recover phase information that is mathematically wrapped. In this paper, we propose and demonstrate a two-dimensional (2D) method to achieve effective phase unwrapping in Doppler Fourier-domain (FD) optical coherence tomography (OCT), and recover the discontinuous phase distribution in retinal blood flow successfully for the first time in Doppler OCT studies. The proposed method is based ...
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    5. Predicting Development of Glaucomatous Visual Field Conversion Using Baseline Fourier-Domain Optical Coherence Tomography

      Predicting Development of Glaucomatous Visual Field Conversion Using Baseline Fourier-Domain Optical Coherence Tomography
      Purpose To predict the development of glaucomatous visual field (VF) defects using Fourier-domain optical coherence tomography (FD-OCT) measurements at baseline visit. Design Multi-center longitudinal observational study. Glaucoma suspects and pre-perimetric glaucoma participants in the Advanced Imaging for Glaucoma Study. Methods The optic disc, the peripapillary retinal nerve fiber layer (NFL), and macular ganglion cell complex (GCC) were imaged with FD-OCT VF was assessed every 6 months. Conversion to perimetric glaucoma ...
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    6. OCT Vitrectomy Probe

      OCT Vitrectomy Probe
      Disclosed herein is a vitrectomy probe, comprising a beam steering system configured to receive a light beam from a sample fiber of an optical coherence tomography instrument; a fundus illumination system configured to receive a beam of white light from a white light source via a multimode fiber; a dichroic mirror; and a beam delivery system configured to illuminate the retina of a subject.
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    7. Methods and systems for blood flow measurement using doppler optical coherence tomography

      Methods and systems for blood flow measurement using doppler optical coherence tomography
      This invention provides methods for non-invasive, real-time measuring and/or monitoring of local blood flow in a subject. Methods of the invention generally include the steps of obtaining Doppler shift images of at least two planes intersecting blood vessels at the scanned location; determining Doppler angles using the Doppler shift images; and then using the Doppler angles thus determined together with the Doppler shift signals to arrive at a measure ...
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    8. Repeated Measurements of the Anterior Segment During Accommodation Using Long Scan Depth Optical Coherence Tomography

      Repeated Measurements of the Anterior Segment During Accommodation Using Long Scan Depth Optical Coherence Tomography
      Objectives: The aim was to determine the repeatability of ultralong scan depth spectral-domain optical coherence tomography (SD-OCT) measurements of the ocular anterior segment during accommodation. Methods: The center wavelength of the SD-OCT light source was 840 nm with a bandwidth of 50 nm. The ocular axial resolution of the system was approximately 6.0 [mu]m, and the scan depth was 7.2 mm in air. Twenty eyes of 20 ...
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    9. SD-OCT with Prolonged Scan Depth for Imaging the Anterior Segment of the Eye

      SD-OCT with Prolonged Scan Depth for Imaging the Anterior Segment of the Eye
      An 840-nm wavelength spectral domain optical coherence tomography (SD-OCT) with prolonged scan depth was developed and mounted onto a conventional slit lamp for imaging the anterior segment of the eye. X-Y cross aiming was applied to align the SD-OCT scanning position during imaging. An internal fixation target displayed on a miniature LCD monitor was provided. The SD-OCT instrument had an axial resolution of 6 µm and a prolonged scan depth ...
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    10. 1-15 of 20 1 2 »
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  2. About Yimin Wang

    Yimin Wang

    Yimin Wang is a Research Assistant Professor in Casey Eye Institute. He earned his Ph.D. degree in optics from the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences in Shanghai, China. He performed postdoctoral fellowships at the University of California, Irvine and the Department of Biomedical Engineering, Duke University.