1. Articles mentioning both Osaka University and Yasushi Ikuno

    1-22 of 22
    1. Parallel detection of Jones-matrix elements in polarization-sensitive optical coherence tomography

      Parallel detection of Jones-matrix elements in polarization-sensitive optical coherence tomography
      The polarization properties of a sample can be characterized using a Jones matrix. To measure the Jones matrix without assumptions of the sample, two different incident states of polarization are usually used. This requirement often causes certain drawbacks in polarization-sensitive optical coherence tomography (PS-OCT), e.g., a decrease in the effective A-scan rate or axial depth range, if a multiplexing scheme is used. Because both the A-scan rate and axial ...
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    2. En face optical coherence tomography imaging of beta and gamma parapapillary atrophy in high myopia

      En face optical coherence tomography imaging of beta and gamma parapapillary atrophy in high myopia
      Objective Recent studies have suggested that optical coherence tomography (OCT)-based classification of parapapillary atrophy (PPA) may be helpful in distinguishing glaucomatous from myopic optic disc changes. However, the pathological implications of PPA may be different in highly myopic eyes that exhibit optic disc deformations distinct from low to moderate myopia. Therefore, we conducted the current study to investigate factors associated with OCT-defined PPA zones measured in en face reconstructed ...
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    3. Retinal Microvasculature and Visual Acuity in Eyes With Branch Retinal Vein Occlusion: Imaging Analysis by Optical Coherence Tomography Angiography

      Retinal Microvasculature and Visual Acuity in Eyes With Branch Retinal Vein Occlusion: Imaging Analysis by Optical Coherence Tomography Angiography
      Purpose : To investigate microvascular changes in the superficial capillary plexus (SCP) and deep capillary plexus (DCP) in eyes with resolved branch retinal vein occlusion (BRVO) and their association with best-corrected visual acuity (BCVA). Methods : Eighty-five eyes (82 consecutive patients) with BRVO after resolution of the macular edema were retrospectively evaluated. All patients underwent optical coherence tomography angiography (OCTA) for assessment of microvascular changes, including capillary telangiectasia, microaneurysm, and disruption of ...
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    4. Quantitative polarization and flow evaluation of choroid and sclera by multifunctional Jones matrix optical coherence tomography

      Quantitative polarization and flow evaluation of choroid and sclera by multifunctional Jones matrix optical coherence tomography
      Quantitative evaluation of optical properties of choroid and sclera are performed by multifunctional optical coherence tomography. Five normal eyes, five glaucoma eyes and one choroidal atrophy eye are examined. The refractive error was found to be correlated with choroidal birefringence, polarization uniformity, and flow in addition to scleral birefringence among normal eyes. The significant differences were observed between the normal and the glaucoma eyes, as for choroidal polarization uniformity, flow ...
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    5. Analysis of Peripapillary Geometric Characters in High Myopia Using Swept-Source Optical Coherence Tomography

      Analysis of Peripapillary Geometric Characters in High Myopia Using Swept-Source Optical Coherence Tomography
      Purpose : We measured the three-dimensional geometric profile around the optic nerve head (ONH) using swept-source optical coherence tomography (SS-OCT) in highly myopic eyes. Methods : We studied 114 highly myopic eyes (6.0 diopters [D]) of 114 patients without glaucoma. Eyes were examined using the prototype SS-OCT. The retinal pigment epithelium (RPE) and chorioscleral interface were traced, and the mean y -axis coordinates of 24 sectors were calculated in circular peripapillary ...
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    6. Birefringence imaging of posterior eye by multi-functional Jones matrix optical coherence tomography

      Birefringence imaging of posterior eye by multi-functional Jones matrix optical coherence tomography
      A clinical grade prototype of posterior multifunctional Jones matrix optical coherence tomography (JM-OCT) is presented. This JM-OCT visualized depth-localized birefringence in addition to conventional cumulative phase retardation imaging through local Jones matrix analysis. In addition, it simultaneously provides a sensitivity enhanced scattering OCT, a quantitative polarization uniformity contrast, and OCT-based angiography. The probe beam is at 1- m wavelength band. The measurement speed and the depth-resolution were 100,000 A-lines ...
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    7. Comparison of spectral-domain and high-penetration OCT for observing morphologic changes in age-related macular degeneration and polypoidal choroidal vasculopathy

      Comparison of spectral-domain and high-penetration OCT for observing morphologic changes in age-related macular degeneration and polypoidal choroidal vasculopathy
      ... Department of Ophthalmology, Osaka University Medical School, Osaka, Japan Department of Ophthalmology E7, Osaka University Medical School, 2-2 Yamadaoka, Suita, 565-0871, Japan Topcon Corporation, Tokyo, Japan ...
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    8. Comparison of enhanced depth imaging and high-penetration optical coherence tomography for imaging deep optic nerve head and parapapillary structures

      Comparison of enhanced depth imaging and high-penetration optical coherence tomography for imaging deep optic nerve head and parapapillary structures
      ...e target tissue to observe Atsuya Miki, Yasushi Ikuno, Yukari Jo, Kohji Nishida Department of Ophthalmology, Osaka University Graduate School of Medicine, Osaka, Japan Purpose: To evaluate and compare the abilities of ...
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    9. 3-D Choroidal Thickness Maps from EDI-OCT in Highly Myopic Eyes

      3-D Choroidal Thickness Maps from EDI-OCT in Highly Myopic Eyes
      Purpose: Myopic chorioretinal atrophy is a debilitating condition that causes severe loss of primary vision. However, its mechanisms and pathologic course are not well understood. We performed volumetric measurements of the posterior choroid via three-dimensional analysis of the choroid in patients with high myopia to understand its structure, and we compared the measurements with those of normal subjects. Methods: Twenty-five highly myopic but otherwise normal eyes and 25 nonmyopic eyes ...
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    10. Choroidal observations in Vogt–Koyanagi–Harada disease using high-penetration optical coherence tomography

      Choroidal observations in Vogt–Koyanagi–Harada disease using high-penetration optical coherence tomography
      Background The aim of this work was to investigate the choroidal morphologic changes of Vogt–Koyanagi–Harada (VKH) disease in vivo using high-penetration optical coherence tomography (HP-OCT) with a long-wavelength light source (1,060 nm). Methods Fourteen patients with VKH disease were included in this study: 12 eyes of six patients with treatment-naive acute VKH in the first 6–12 months after diagnosis and 16 eyes of eight patients in ...
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    11. Evaluation of the Choroidal Thickness Using High-Penetration Optical Coherence Tomography With Long Wavelength in Highly Myopic Normal-Tension Glaucoma

      Evaluation of the Choroidal Thickness Using High-Penetration Optical Coherence Tomography With Long Wavelength in Highly Myopic Normal-Tension Glaucoma
      ...rsity Graduate School of Medicine, Suita, Japan , * Yasushi Ikuno Affiliations + Department of Ophthalmology, Osaka University Graduate School of Medicine, Suita, Japan + Corresponding Author Information Inquiries to Yas...
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    12. Spectral-Domain Optical Coherence Tomographic Findings in Punctate Inner Choroidopathy

      Spectral-Domain Optical Coherence Tomographic Findings in Punctate Inner Choroidopathy
      Purpose: To investigate the pathology of punctate inner choroidopathy (PIC) using spectral-domain optical coherence tomography. Methods: We retrospectively reviewed spectral-domain optical coherence tomography findings of 14 cases with active PIC. We obtained specific appearance of the active PIC lesion that were characterized by yellowish/white round spots in fundus examination with fluorescein leakage. Fluorescein angiogram and confocal indocyanine green angiogram were also reviewed. Results: Three cases (21%) of 14 were ...
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    13. Spectral-Domain Optical Coherence Tomographic Findings in Myopic Foveoschisis

      Purpose: The purpose of this study was to investigate the sensitivity of various scan modes of spectral-domain optical coherence tomography (SD-OCT) for detecting pathologies that may accompany myopic foveoschisis, which is important for making surgical decisions and planning surgical strategies for myopic foveoschisis. Methods: Twenty-one eyes of 18 patients were diagnosed with myopic foveoschisis by SD-OCT. Patients were examined with SD-OCT using both a five-line raster scan and a three-dimensional ...
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    14. 1-22 of 22
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  2. Organizations in the News

    1. (4 articles) University of Tsukuba
    2. (3 articles) Tokyo Medical University
    3. (1 articles) UCSD
  3. People in the News

    1. (5 articles) Yoshiaki Yasuno
    2. (3 articles) Masahiro Miura
    3. (2 articles) Masahiro Akiba
    4. (2 articles) Shuichi Makita
    5. (2 articles) Deepa K. Kasaragod
    6. (1 articles) Masahiro Yamanari
    7. (1 articles) Robert N. Weinreb
  4. OCT Companies in the News

    1. (3 articles) Topcon Medical Systems
    2. (2 articles) Tomey Corporation
    3. (1 articles) Heidelberg Engineering