1. Articles from Mohammed Abdul Rasheed

    1-4 of 4
    1. Choroidal Vascularity Index Using Swept-Source and Spectral-Domain Optical Coherence Tomography: A Comparative Study

      Choroidal Vascularity Index Using Swept-Source and Spectral-Domain Optical Coherence Tomography: A Comparative Study

      BACKGROUND AND OBJECTIVE: Choroidal vascularity index (CVI) is a noninvasive tool to assess choroidal structure. The objective of the current study was to compare the CVI measurements on swept-source optical coherence tomography (SS-OCT) and spectral-domain OCT (SD-OCT) scans using the same image binarization protocol. PATIENTS AND METHODS: This prospective study was conducted from July 2016 through January 2017 and involved 54 healthy volunteers at a tertiary referral eye care institute in Southern India. Choroidal scans were obtained using both SS- and SD-OCT machines. An automated binarization algorithm was used to compute CVI. RESULTS: The mean CVI with SS-OCT scans was ...

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    2. Optical coherence tomography angiography in acute unilateral nonarteritic anterior ischemic optic neuropathy: A comparison with the fellow eye and with eyes with papilledema

      Optical coherence tomography angiography in acute unilateral nonarteritic anterior ischemic optic neuropathy: A comparison with the fellow eye and with eyes with papilledema

      Purpose: The purpose of this study is to detect the optic nerve head (ONH) and peripapillary perfusion in eyes with acute nonarteritic anterior ischemic optic neuropathy (NAION) compared to the fellow normal eyes using optical coherence tomography angiography (OCTA) and to compare with nonischemic disc edema (papilledema). Methods: Retrospective analysis of patients with unilateral NAION who underwent OCTA was performed. All patients underwent comprehensive ocular examination including visual field testing. ONH was imaged using 6 mm × 6 mm scan by Topcon DRI Triton ® OCT system. Vascularity loss was analyzed using ImageJ software in diseased eyes in comparison to normal fellow ...

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    3. Quantitative shadow compensated optical coherence tomography of choroidal vasculature

      Quantitative shadow compensated optical coherence tomography of choroidal vasculature

      Conventionally rendered optical coherence tomography (OCT) images of the posterior segment contain shadows which influence the visualization of deep structures such as the choroid. The purpose of this study was to determine whether OCT shadow compensation (SC) alters the appearance of the choroid and the apparent choroidal vascularity index (CVI), an OCT-derived estimated ratio of luminal to total choroidal volume. All scans were shadow compensated using a previously published algorithm, binarized using a novel validated algorithm and extracted binarized choroid to estimate CVI. On 27 raw swept-source OCT volume-scans of healthy subjects, the effect of SC on CVI was established ...

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      Mentions: K. Bailey Freund
    4. Automated quantification of Haller’s layer in choroid using swept-source optical coherence tomography

      Automated quantification of Haller’s layer in choroid using swept-source optical coherence tomography

      Objective To develop an algorithm for automated quantification of Haller’s layer in choroid using swept-source optical coherence tomography (OCT). Background So far, to understand the association of various diseases with structural changes of choroid, only gross indicators such as thickness, volume and vascularity index have been examined. However, certain diseases affect specific sublayers of the choroid. Accordingly, a need for targeted quantitation arises. In particular, there is significant interest in understanding Haller’s layer, a choroidal sublayer comprising relatively large blood vessels. Unfortunately, its intricate vasculature makes, manual quantitation difficult, tedious, and error-prone. To surmount this difficulty, it is ...

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    1-4 of 4
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  2. Topics in the News

    1. (1 articles) L V Prasad Eye Institute
    2. (1 articles) K. Bailey Freund
    3. (1 articles) Topcon Medical Systems
    4. (1 articles) University of Illinois at Urbana-Champaign
    5. (1 articles) Duke University
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    Automated quantification of Haller’s layer in choroid using swept-source optical coherence tomography Quantitative shadow compensated optical coherence tomography of choroidal vasculature Optical coherence tomography angiography in acute unilateral nonarteritic anterior ischemic optic neuropathy: A comparison with the fellow eye and with eyes with papilledema Choroidal Vascularity Index Using Swept-Source and Spectral-Domain Optical Coherence Tomography: A Comparative Study IMAGING TECHNIQUE FROM BECKMAN LAB NAMED TOP 10 MICROSCOPY INNOVATION Optical coherence refraction tomography University of Southern California Receives NIH Grant for Imaging Cerebral and Retinal Microvasculature in Cerebral Small Vessel Disease Columbia University Receives NIH Grant  for Measures of Human Receptor and post Receptor Activity Multimodal Imaging of Multiple Evanescent White Dot Syndrome: A New Interpretation MULTIMODAL IMAGING AND TREATMENT OF SYPHILITIC CHOROIDAL NEOVASCULARIZATION Highly coherent supercontinuum generation in CS2 infiltrated single-core optical fiber Glioma cell migration dynamics in brain tissue assessed by multimodal optical imaging