1. Articles from michael r. hee

    1-7 of 7
    1. Anterior Segment Parameters of Filipino-Americans Compared to Chinese-Americans and Caucasian Americans Using Anterior Segment Optical Coherence Tomography

      Anterior Segment Parameters of Filipino-Americans Compared to Chinese-Americans and Caucasian Americans Using Anterior Segment Optical Coherence Tomography

      Purpose : We compare anterior segment characteristics of Filipino- versus Chinese- and Caucasian-Americans to describe the differences in risk factors among each ethnic group. Methods : A cross-sectional study was conducted among Filipino, Chinese, and Caucasian subjects without glaucoma who underwent a standardized set of ocular examinations and anterior segment optical coherence tomography (Visante ASOCT) imaging. Zhongshan Angle Assessment Program (ZAAP) 4 was used for ASOCT image analysis. The following quantitative parameters wereobtained from ZAAP: (1) angle opening distance (AOD500, AOD750), angle recess area at 750 μm (ARA), and trabecular-iris space area at 500 and 750 μm (TISA500, TISA750); (2) iris parameters ...

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      Mentions: UCSF
    2. Repair of Descemet Membrane Detachments With the Assistance of Anterior Segment Optical Coherence Tomography

      Extensive Descemet membrane detachment (DMD) is a rare complication of intraocular surgery that can lead to corneal decompensation.1 Although DMD may resolve spontaneously, surgical repair frequently is required. The diagnosis may be difficult because corneal edema can obscure visualization of the Descemet membrane (DM). Ultrasonographic biomicroscopy (UBM) has been the standard for imaging DMD in patients with corneal opacity.2 Anterior segment optical coherence tomography (OCT) is a new technique for imaging anterior segment anatomy to evaluate narrow angles, flaps created with laser-assisted in situ keratomileusis, and corneas after DM-stripping automated endothelial keratoplasty.3 We report 2 cases of ...
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    3. Optical coherence tomography of the eye (Thesis)

      Optical coherence tomography of the eye (Thesis)
      Optical Coherence Tomography (OCT) is a new technique for high-resolution, cross-sectional imaging of tissue in which the time-of-flight delay of light reflected from internal tissue structures is resolved with high precision using interferometer. Tomographic images are obtain which are analogous to those provided by ultrasound except that image contrast relies on differences in optical rather than acoustic properties of tissue. The use of light rather than sound enable higher resolution (10 um) and non-contact imaging. A clinically viable high-sensitivity, fiber-optic based OCT instrument has been constructed based on engineering principles derived from optical communication theory. Computer algorithms have also been ...
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    4. Application of optical coherence tomography in nondestructive evaluation of material microstructure

      Application of optical coherence tomography in nondestructive evaluation of material microstructure

      Techniques for nondestructive evaluation (NDE), testing, and inspection of parts during manufacturing and materials processing, in situ, or during design, is a key technology. The authors use optical coherence tomography (OCT) is a high-resolution, high-sensitivity imaging technology that is based on the coherence properties of light.

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    5. In vivo retinal imaging by optical coherence tomography

      In vivo retinal imaging by optical coherence tomography
      We describe what are to our knowledge the first in vivo measurements of human retinal structure with optical coherence tomography. These images represent the highest depth resolution in vivo retinal images to date. The tomographic system, image-processing techniques, and examples of high-resolution tomographs and their clinical relevance are discussed
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    6. Optical Coherence Tomography

      A technique called optical coherence tomography (OCT) has been developed for noninvasive cross-sectional imaging in biological systems. OCT uses low-coherence interferometry to produce a two-dimensional image of optical scattering from internal tissue microstructures in a way that is analogous to ultrasonic pulse-echo imaging. OCT has longitudinal and lateral spatial resolutions of a few micrometers and can detect reflected signals as small as approximately 10(-10) of the incident optical power. Tomographic imaging is demonstrated in vitro in the peripapillary area of the retina and in the coronary artery, two clinically relevant examples that are representative of transparent and turbid media ...
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    1-7 of 7
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    1. (5 articles) Massachusetts Institute of Technology
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    In vivo retinal imaging by optical coherence tomography Optical coherence tomography of the eye (Thesis) Optical coherence microscopy in scattering media Application of optical coherence tomography in nondestructive evaluation of material microstructure Anterior Segment Parameters of Filipino-Americans Compared to Chinese-Americans and Caucasian Americans Using Anterior Segment Optical Coherence Tomography Stevens Institute of Technology Receives NIH Grant for Dynamic Tracer Kinetic Model to Detect Preclinical Diabetic Retinopathy Minimally Invasive Polarization Sensitive Optical Coherence Tomography (PS-OCT) for assessing Pre-OA, a pilot study on technical feasibility Repeatability and Reproducibility of 4.5 by 4.5 mm Peripapillary Optical Coherence Tomography Angiography Scans in Glaucoma and Non-Glaucoma Eyes Insights into the developing fovea revealed by imaging Compartmental analysis of three-dimensional choroidal vascularity and thickness of myopic eyes in young adults using SS-OCTA In Vivo Intraocular Lens Thickness Measurement and Power Estimation Using Optical Coherence Tomography Optical Coherence Tomography Angiography Findings in Malignant Hypertensive Retinopathy