1. Nagahisa Yoshimura

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    1. Mentioned In 111 Articles

    2. Optical Coherence Tomography Angiography to Estimate Retinal Blood Flow in Eyes with Retinitis Pigmentosa

      Explore Nature Publishing Group Ophthalmology
      Optical Coherence Tomography Angiography to Estimate Retinal Blood Flow in Eyes with Retinitis Pigmentosa
      Ophthalmologists sometimes face difficulties in identifying the origin of visual acuity (VA) loss in a retinitis pigmentosa (RP) patient, particularly before cataract surgery: cataract or the retinal disease state. Therefore, it is important to identify the significant factors correlating with VA. Nowadays, retinal blood flow in superficial and deep layers can be estimated non-invasively using optical coherence tomography angiography (OCTA). We estimated blood flow per retinal layer by using OCTA ...
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      Mentions: Nagahisa Yoshimura Kenji Yamashiro Kyoto University Graduate School of Medicine

    3. CHANGES IN THE POSTERIOR VITREOUS AFTER CATARACT SURGERY ASSESSED BY SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY

      Explore LWW Online Ophthalmology
      CHANGES IN THE POSTERIOR VITREOUS AFTER CATARACT SURGERY ASSESSED BY SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY
      Purpose: To assess changes in the posterior vitreous caused directly by phacoemulsification with implantation of an intraocular lens, using the enhanced vitreous swept-source optical coherence tomography system (Topcon, Tokyo, Japan). Methods: Consecutive patients with cataract without posterior vitreous detachment were enrolled. Swept-source optical coherence tomography examinations were performed 1 day before and several days after surgery, using enhanced vitreous visualization. We compared preoperative and postoperative posterior vitreous status and measured ...
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      Mentions: Topcon Medical Systems Nagahisa Yoshimura Kyoto University Graduate School of Medicine

    4. EVALUATION OF MACULAR ISCHEMIA IN EYES WITH BRANCH RETINAL VEIN OCCLUSION: An Optical Coherence Tomography Angiography Study

      Explore LWW Online Ophthalmology
      EVALUATION OF MACULAR ISCHEMIA IN EYES WITH BRANCH RETINAL VEIN OCCLUSION: An Optical Coherence Tomography Angiography Study
      Purpose: To quantitatively assess macular morphology and perfusion status using optical coherence tomography, and optical coherence tomography angiography in eyes with branch retinal vein occlusion when macular edema has completely resolved, and to investigate the impact on visual function. Methods: Thirty consecutive eyes with branch retinal vein occlusion-macular edema that resolved after treatment with intravitreal ranibizumab injections were included. Macular sensitivity was measured by microperimetry; defect length of foveal ellipsoid ...
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      Mentions: Nagahisa Yoshimura Akitaka Tsujikawa Sotaro Ooto

    5. Structural and Functional Analyses in Nonarteritic Anterior Ischemic Optic Neuropathy: Optical Coherence Tomography Angiography Study

      Explore LWW Online Neurology , Ophthalmology
      Structural and Functional Analyses in Nonarteritic Anterior Ischemic Optic Neuropathy: Optical Coherence Tomography Angiography Study
      Background: Retinal and optic disc perfusion in nonarteritic anterior ischemic optic neuropathy (NAION) is incompletely understood. Our aim was to investigate the characteristics of the microvascular structures at the peripapillary area and optic disc, and their associations with retinal structure and function in patients with NAION. Methods: We conducted a prospective, observational case series study. Thirty-four eyes, consisting of 15 NAION eyes and 19 normal eyes, were included. Optical coherence ...
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      Mentions: Nagahisa Yoshimura

    6. In Vivo Choroidal Vascular Lesions in Diabetes on Swept-Source Optical Coherence Tomography

      Explore Journals | PLOS Ophthalmology
      In Vivo Choroidal Vascular Lesions in Diabetes on Swept-Source Optical Coherence Tomography
      Diabetes induces microvascular diseases including diabetic retinopathy and choroidopathy which reciprocally promote the pathogenesis, although optical coherence tomography images of diabetic choroidopathy remains to be documented. Here we evaluated the qualitative characteristics of choroidal vascular lesions in patients with diabetes and their association with diabetic retinopathy on swept-source optical coherence tomography (SS-OCT) images. We retrospectively reviewed 110 consecutive eyes of 110 patients with diabetes and 35 eyes of 35 healthy ...
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      Mentions: Nagahisa Yoshimura

    7. Swept-Source Optical Coherence Tomography Detecting Intraoperative Acute Descemet's Fold Formation

      Explore Karger Publishers Ophthalmology
      Swept-Source Optical Coherence Tomography Detecting Intraoperative Acute Descemet's Fold Formation
      Background: To present an intraoperative acute Descemets fold formation using swept-source optical coherence tomography (SS-OCT) imaging. Case Report: A 67-year-old man complaining of reduced visual acuity in the left eye. A 25-gauge pars plana vitrectomy combined with phacoemulsification cataract surgery was performed to remove the vitreomacular traction. When hydro-sealing was performed, striae rapidly spread in the cornea. SS-OCT B-scan images performed on postoperative day 1 revealed a wavy Descemets membrane ...
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      Mentions: Nagahisa Yoshimura Kyoto University Graduate School of Medicine

    8. Increased Choroidal Vascularity in Central Serous Chorioretinopathy Quantified Using Swept-Source Optical Coherence Tomography

      Explore Elsevier Health Ophthalmology
      Increased Choroidal Vascularity in Central Serous Chorioretinopathy Quantified Using Swept-Source Optical Coherence Tomography
      Purpose To investigate the choroidal vascular structural changes in eyes with central serous chorioretinopathy (CSC) by using swept-source optical coherence tomography (SS-OCT). Design Prospective cross-sectional study. Methods We prospectively examined 40 eyes of 34 consecutive patients with CSC. Three-dimensional choroidal images of the macular area, covering 3 3 mm and 6 6 mm, were obtained with SS-OCT. En face images of the microvasculature of the inner choroid and large choroidal ...
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      Mentions: Nagahisa Yoshimura Kenji Yamashiro Kyoto University Graduate School of Medicine

    9. Morphological features in anterior scleral inflammation using swept-source optical coherence tomography with multiple B-scan averaging

      Explore BJO Online Ophthalmology
      Morphological features in anterior scleral inflammation using swept-source optical coherence tomography with multiple B-scan averaging
      Background/aims To determine the morphological features of anterior scleral inflammation using swept-source optical coherence tomography. Methods In this retrospective observational study, we examined 17 eyes of 14 patients with diffuse anterior scleral inflammation and 13 eyes of 13 young unaffected patients. We compared cross-sectional images of the conjunctiva, episclera and sclera obtained using swept-source optical coherence tomography equipped with a multiple B-scan averaging process between normal eyes and those ...
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      Mentions: Nagahisa Yoshimura Kyoto University Graduate School of Medicine

    10. Morphological changes after trabeculectomy in highly myopic eyes with high intraocular pressure by using swept-source optical coherence tomography

      Explore ScienceDirect Ophthalmology
      Morphological changes after trabeculectomy in highly myopic eyes with high intraocular pressure by using swept-source optical coherence tomography
      Purpose To investigate the effects of intraocular pressure (IOP) reduction on the eyeball shape in highly myopic eyes with high IOP. Methods This study included patients with an axial length 26.5 mm and high IOP 22 mmHg after receiving maximum medication, with successful trabeculectomy by a single surgeon, and who underwent swept-source optical coherence tomography (SS-OCT) examinations on preoperative and postoperative 3 months periods. Eight eyes of 7 patients ...
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      Mentions: Nagahisa Yoshimura Kyoto University Graduate School of Medicine Tadamichi Akagi

    11. Relationship between Functional and Structural Changes in Diabetic Vessels in Optical Coherence Tomography Angiography

      Explore Nature Publishing Group Ophthalmology
      Relationship between Functional and Structural Changes in Diabetic Vessels in Optical Coherence Tomography Angiography
      The decorrelation signals in optical coherence tomography angiography (OCTA) are derived from the flow of erythrocytes and concomitantly delineate the retinal vasculature. We compared the structural and functional characteristics of vascular lesions visualized in fluorescein angiography (FA), OCTA, and en-face OCT images in 53 eyes (28 patients) with diabetic retinopathy (DR). The foveal avascular zone (FAZ) areas in OCTA images in the superficial layer almost corresponded to those in FA ...
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      Mentions: Nagahisa Yoshimura

    12. Microvascular Density in Glaucomatous Eyes with Hemifield Visual Field Defects: An Optical Coherence Tomography Angiography Study

      Explore American Journal of Ophthalmology Ophthalmology
      Microvascular Density in Glaucomatous Eyes with Hemifield Visual Field Defects: An Optical Coherence Tomography Angiography Study
      Purpose To investigate microcirculation of peripapillary retina and optic disc in eyes with primary open-angle glaucoma (POAG) and hemifield visual field (VF) defects. Design Prospective observational case series with normal comparison group. Methods Sixty eyes with POAG (41 with superior and 19 with inferior hemifield VF defects) and 21 normal eyes were included in this study. Optical coherence tomography (OCT) angiography was used to acquire 3 3 mm optic disc ...
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      Mentions: Nagahisa Yoshimura Kyoto University Graduate School of Medicine Tadamichi Akagi

    13. Microarchitecture of the Vitreous Body: A High-Resolution Optical Coherence Tomography Study

      Explore American Journal of Ophthalmology Ophthalmology
      Microarchitecture of the Vitreous Body: A High-Resolution Optical Coherence Tomography Study
      Purpose To report novel vitreous body microarchitecture findings using high-resolution spectral-domain OCT (HR-SD-OCT). Design Prospective, cross-sectional study. Methods Horizontal and vertical retinal cross-sectional images that were 10 mm long were acquired from 17 eyes of 17 young healthy volunteers using HR-SD-OCT with enhanced vitreous imaging (EVI). Images were acquired through the fovea, upper vessel arcade, and lower vessel arcade. Results Three new findings on vitreous body microarchitecture were found. First ...
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      Mentions: Nagahisa Yoshimura Kyoto University Graduate School of Medicine

    14. Characterization of Inner Retinal Spots With Inverted Reflectivity on En Face Optical Coherence Tomography in Diabetic Retinopathy

      Explore IOVS Journal Ophthalmology
      Characterization of Inner Retinal Spots With Inverted Reflectivity on En Face Optical Coherence Tomography in Diabetic Retinopathy
      Purpose : The purpose of this study was to characterize inner retinal spots with inverted reflectivity on en face images of swept-source optical coherence tomography (SS-OCT) in diabetic retinopathy (DR). Methods : We retrospectively reviewed seventy-five eyes of 75 patients with DR (15 eyes with individual grades of DR severity). We obtained three-dimensional images (6 6 mm) centered on the fovea, followed by the generation of en face images. We investigated the ...
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      Mentions: Nagahisa Yoshimura Kyoto University Graduate School of Medicine

    15. Detection of Myopic Choroidal Neovascularization Using Optical Coherence Tomography Angiography

      Explore American Journal of Ophthalmology Ophthalmology
      Detection of Myopic Choroidal Neovascularization Using Optical Coherence Tomography Angiography
      Purpose To assess whether optical coherence tomography angiography (OCTA) can be used as an alternative to conventional fundus fluorescein angiography (FFA) for the detection of myopic choroidal neovascularization (CNV) Design Validity and reliability analysis Methods Twenty-eight eyes of 26 consecutive Japanese patients with exudative lesions associated with pathological myopia were included in this institutional study. Myopic CNV was detected in 23 eyes of 22 patients; five eyes exhibited simple hemorrhage ...
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      Mentions: Nagahisa Yoshimura Kenji Yamashiro Kyoto University Graduate School of Medicine

    16. Enhanced-Resolution Optical Coherence Tomography Imaging

      Explore Karger Publishers Ophthalmology
      Enhanced-Resolution Optical Coherence Tomography Imaging
      Purpose: The effect of the enhanced-resolution imaging (ERI) technique on optical coherence tomography (OCT) images was evaluated. Methods: A total of 5 healthy subjects and 20 patients diagnosed with various eye diseases were recruited into the study. ERI, a novel image processing technique, was accomplished by using super-resolution technology, and was assessed by objectively and subjectively comparing the image quality among three different image groups: images enlarged without bicubic interpolation ...
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      Mentions: Nagahisa Yoshimura Kyoto University Graduate School of Medicine
    17. 1-15 of 111 1 2 3 4 5 6 7 8 »
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  4. About Nagahisa Yoshimura

    Nagahisa Yoshimura

    Nagahisa Yoshimura, MD, is with Department of Ophthalmology, Shinshu University School of Medicine, Matsumoto, Japan.

  5. Related Topics

    1. Spectral-Domain Optical Coherence Tomography with Multiple B-Scan Averaging for Enhanced Imaging of Retinal Diseases.
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    2. Foveal Photoreceptor Layer in Eyes with Persistent Cystoid Macular Edema Associated with Branch Retinal Vein Occlusion
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    3. Association Between Abnormal Autofluorescence and Photoreceptor Disorganization in Retinitis Pigmentosa
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    4. Biometric Features of Peripapillary Atrophy Beta in Eyes with High Myopia
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