1. Articles from Yoshiaki Kiuchi

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    1. Anterior Segment Optical Coherence Tomography in Ocular Argyrosis

      Anterior Segment Optical Coherence Tomography in Ocular Argyrosis

      Purpose The current study investigated differences in the peripapillary and macular choroidal areas between patients with primary open-angle glaucoma (POAG) and healthy controls because the choroid may potentially play a role in glaucoma pathophysiology. Methods We assessed 57 healthy controls and 42 POAG patients in a cross-sectional comparative study. We used enhanced depth imaging optical coherence tomography (EDI-OCT) and then converted the luminal and interstitial areas to binary images using the Niblack method to obtain peripapillary and macular choroidal images. The relationship between the choroidal area and demographic and ocular characteristics were determined with univariate and multivariate linear regression analysis ...

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    2. Assessment of primary open-angle glaucoma peripapillary and macular choroidal area using enhanced depth imaging optical coherence tomography

      Assessment of primary open-angle glaucoma peripapillary and macular choroidal area using enhanced depth imaging optical coherence tomography

      Purpose The current study investigated differences in the peripapillary and macular choroidal areas between patients with primary open-angle glaucoma (POAG) and healthy controls because the choroid may potentially play a role in glaucoma pathophysiology. Methods We assessed 57 healthy controls and 42 POAG patients in a cross-sectional comparative study. We used enhanced depth imaging optical coherence tomography (EDI-OCT) and then converted the luminal and interstitial areas to binary images using the Niblack method to obtain peripapillary and macular choroidal images. The relationship between the choroidal area and demographic and ocular characteristics were determined with univariate and multivariate linear regression analysis ...

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    3. Determination of iris thickness development in children using swept-source anterior-segment optical coherence tomography

      Determination of iris thickness development in children using swept-source anterior-segment optical coherence tomography

      Purpose The uvea comprises the iris, ciliary body, and choroid. However, the development of the anterior part (iris and ciliary body) in children is not yet fully elucidated. We investigated the iris thickness (IT) in children using swept-source anterior-segment optical coherence tomography (ASOCT). Methods In this retrospective, clinic-based study, we enrolled 41 children (mean ± standard deviation: 6.8 ± 3.3 years; range: 3–16; 17 males) with normal or mild refractive error. Horizontal scanning images of swept-source ASOCT were analyzed in temporal and nasal angle areas. The ITs at 1 and 2 mm from the pupil edge were measured using ...

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    4. Absence of the foveal avascular zone in a nanophthalmic child revealed by optical coherence tomography angiography

      Absence of the foveal avascular zone in a nanophthalmic child revealed by optical coherence tomography angiography

      Purpose Optical coherence tomography angiography (OCTA) is a new non-invasive imaging technique that does not require the use of contrast agents and that allows the visualization of the retinal microvasculature in a layer-by-layer manner without bright light. This merit allows us to obtain the fundus image in children. Retinal vessels are typically absent from the center of the fovea , an area known as the foveal avascular zone (FAZ). The purpose of the present case study was to evaluate the FAZ in a nanophthalmic pediatric patient with OCTA. Obsevations A 6-year-old girl was referred to the Hiroshima University Hospital because of ...

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    5. Iris Thickness and Severity of Neovascular Glaucoma Determined Using Swept-source Anterior-segment Optical Coherence Tomography

      Iris Thickness and Severity of Neovascular Glaucoma Determined Using Swept-source Anterior-segment Optical Coherence Tomography

      Purpose: To investigate the iris thickness (IT) in neovascular glaucoma (NVG) using swept-source anterior-segment optical coherence tomography (ASOCT). Patients and Methods: In this retrospective, clinic-based, comparative study, we enrolled 20 NVG patients (11 with 360° angle-closure [AC]-NVG and 9 with NVG without AC) and 14 healthy age-matched controls. Horizontal scanning images of swept-source ASOCT were analyzed using software calipers in temporal and nasal angle areas. ITs at 1 and 2▒mm from the pupil edge were measured using ASOCT. The relation between IT and the severity of NVG, the effects of intraocular pressure (IOP), intravitreal anti-vascular endothelial growth factor ...

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    6. Glaucoma Implant Tube Lumen Obstruction Visualized Using Anterior Segment Optical Coherence Tomography

      Glaucoma Implant Tube Lumen Obstruction Visualized Using Anterior Segment Optical Coherence Tomography

      We report a case of glaucoma implant tube lumen obstruction visualized with anterior segment optical coherence tomography (ASOCT) and present its surgical management. The patient was a 66-year-old man with refractory glaucoma associated with traumatic aphakia in the right eye after trabeculectomy, several bleb needling procedures, and scleral fixation of the intraocular lens with pars plana vitrectomy. Finally, we performed Baerveldt implantation at the pars plana of the temporal inferior quadrant with a several Sherwood slit. However, his intraocular pressure (IOP) was >30 mm Hg despite maximum medication for several weeks. We attempted second vitrectomy and completely removed vitreous around ...

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    7. Width of abnormal ganglion cell complex area determined using optical coherence tomography to predict glaucoma

      Width of abnormal ganglion cell complex area determined using optical coherence tomography to predict glaucoma

      Purposes We examined the relationships of ganglion cell complex (GCC) parameters determined on spectral-domain optical coherence tomography (SD-OCT), especially the width of abnormal areas, and its ability to detect various stages of glaucoma. Methods OCT parameters of glaucomatous and normal eyes were determined with the RTVue SD-OCT. Widths of abnormal GCC areas marked by either red or yellow on the OCT significance map were quantified with image J software. The relationships between the abnormal GCC area and other GCC parameters [thickness, focal loss volume (FLV), and global loss volume (GLV)] and the peripapillary retinal nerve fiber layer (RNFL) thickness were ...

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    8. Macular choroidal thickness and volume in healthy pediatric individuals measured by swept-source optical coherence tomography

      Macular choroidal thickness and volume in healthy pediatric individuals measured by swept-source optical coherence tomography

      Purpose: To evaluate the choroidal thickness and volume in healthy pediatric individuals by swept-source optical coherence tomography (SS-OCT) and to compare the findings to those of adults. Methods: One hundred eyes of 100 healthy pediatric volunteers (3-15 years) and 83 eyes of 83 healthy adult volunteers (24-87 years) were examined by SS-OCT with a tunable long wavelength laser source. The three-dimensional raster scan protocol was used to construct a chroidal thickness map. When the built-in software delineated an erroneous chorioscleral border in the B-scan images, manual segmentation was used. Results: The central choroidal thickness and volume within a 1.0-mm ...

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    9. Comparison of anterior chamber depth measurements by 3-dimensional optical coherence tomography, partial coherence interferometry biometry, Scheimpflug rotating camera imaging, and ultrasound biomicroscopy

      Comparison of anterior chamber depth measurements by 3-dimensional optical coherence tomography, partial coherence interferometry biometry, Scheimpflug rotating camera imaging, and ultrasound biomicroscopy

      Purpose To evaluate the congruity of anterior chamber depth (ACD) measurements using 4 devices. Setting Saneikai Tsukazaki Hospital, Himeji City, Japan. Design Comparative case series. Methods In 1 eye of 42 healthy participants, the ACD was measured by 3-dimensional corneal and anterior segment optical coherence tomography (CAS-OCT), partial coherence interferometry (PCI), Scheimpflug imaging, and ultrasound biomicroscopy (UBM). The differences between the measurements were evaluated by 2-way analysis of variance and post hoc analysis. Agreement between the measurements was evaluated using Bland-Altman analysis. To evaluate the true ACD using PCI, the automatically calculated ACD minus the central corneal thickness measured by ...

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    1-9 of 9
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  2. Topics in the News

    1. (2 articles) Taiji Sakamoto
    2. (1 articles) National Institutes of Health
    3. (1 articles) University of Rochester
    4. (1 articles) Gadi Wollstein
    5. (1 articles) Optovue
    6. (1 articles) Topcon Medical Systems
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    Comparison of anterior chamber depth measurements by 3-dimensional optical coherence tomography, partial coherence interferometry biometry, Scheimpflug rotating camera imaging, and ultrasound biomicroscopy Macular choroidal thickness and volume in healthy pediatric individuals measured by swept-source optical coherence tomography Width of abnormal ganglion cell complex area determined using optical coherence tomography to predict glaucoma Glaucoma Implant Tube Lumen Obstruction Visualized Using Anterior Segment Optical Coherence Tomography Iris Thickness and Severity of Neovascular Glaucoma Determined Using Swept-source Anterior-segment Optical Coherence Tomography Absence of the foveal avascular zone in a nanophthalmic child revealed by optical coherence tomography angiography Determination of iris thickness development in children using swept-source anterior-segment optical coherence tomography Assessment of primary open-angle glaucoma peripapillary and macular choroidal area using enhanced depth imaging optical coherence tomography Anterior Segment Optical Coherence Tomography in Ocular Argyrosis Medical treatment of inflammatory punctual stenosis monitored by anterior segment optical coherence tomography Development and Validation of a Deep Learning System for Diagnosing Glaucoma Using Optical Coherence Tomography Methylene blue-filled biodegradable polymer particles as a contrast agent for optical coherence tomography