1. Zhihong Hu

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    1-14 of 14
    1. Mentioned In 14 Articles

    2. Semiautomated segmentation and analysis of retinal layers in three-dimensional spectral-domain optical coherence tomography images of patients with atrophic age-related macular degeneration

      Semiautomated segmentation and analysis of retinal layers in three-dimensional spectral-domain optical coherence tomography images of patients with atrophic age-related macular degeneration
      Historically, regular drusen and geographic atrophy (GA) have been recognized as the hallmarks of nonneovascular age-related macular degeneration (AMD). Recent imaging developments have revealed another distinct nonneovascular AMD phenotype, reticular pseudodrusen (RPD). We develop an approach to semiautomatically quantify retinal surfaces associated with various AMD lesions (i.e., regular drusen, RPD, and GA) in spectral domain (SD) optical coherence tomography (OCT) images. More specifically, a graph-based algorithm was used to ...
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    3. Comparison of Retinal Layer Intensity Profiles From Different OCT Devices

      Comparison of Retinal Layer Intensity Profiles From Different OCT Devices
      BACKGROUND AND OBJECTIVE: The purpose of this study is to use automated multiple retinal layer segmentation to compare retinal layer intensity profiles between different spectral-domain optical coherence tomography (SD-OCT) devices with and without normalization. PATIENTS AND METHODS: A graph-based multistage segmentation approach was used to identify 11 boundaries in horizontal SD-OCT B-scans passing through the foveal center. Four acquisition protocols from two different SD-OCT devices were applied on 34 eyes ...
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    4. Segmentation of the Geographic Atrophy in Spectral-domain Optical Coherence Tomography and Fundus Autofluorescene Images

      Segmentation of the Geographic Atrophy in Spectral-domain Optical Coherence Tomography and Fundus Autofluorescene Images
      Purpose: The purpose is to develop a geographic atrophy segmentation approach in both spectral-domain optical coherence tomography (SD-OCT) and fundus autofluorescence (FAF) images and compare the segmentation performance. Methods: To identify GA in SD-OCT images, three surfaces were first segmented using graph search. A 2-D partial OCT projection image was created from the segmented choroid layer. A level-set approach was applied to segment GA in the partial OCT projection image ...
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    5. Multiple layer segmentation and analysis in three-dimensional spectral-domain optical coherence tomography volume scans

      Multiple layer segmentation and analysis in three-dimensional spectral-domain optical coherence tomography volume scans
      ...tion in normal subjects may provide a comparative reference for subsequent adaptations in eyes with diseases. Zhihong Hu ; Xiaodong Wu ; Amirhossein Hariri and Srinivas R. Sadda "Multiple layer segmentation and analysis ...
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    6. Automated multilayer segmentation and characterization in 3D spectral-domain optical coherence tomography images

      Automated multilayer segmentation and characterization in 3D spectral-domain optical coherence tomography images
      ...omated multilayer segmentation and characterization in 3D spectral-domain optical coherence tomography images Zhihong Hu ; Xiaodong Wu ; Amirhossein Hariri ; SriniVas R. Sadda; Automated multilayer segmentation and chara...
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    7. Semiautomated Segmentation of the Choroid in Spectral-domain Optical Coherence Tomography Volume Scans

      Semiautomated Segmentation of the Choroid in Spectral-domain Optical Coherence Tomography Volume Scans
      Purpose: Changes in the choroid, in particular its thickness, are believed to be of importance in the pathophysiology of a number of retinal diseases. The purpose of this study is to adapt the graph search algorithm to semi-automatically identify the choroidal layer in spectral-domain optical coherence tomography (SD-OCT) volume scans and compare its performance to manual delineation. Methods: A graph-based multi-stage segmentation approach was used to identify the choroid, defined ...
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    8. Multimodal Retinal Vessel Segmentation from Spectral-Domain Optical Coherence Tomography and Fundus Photography

      Multimodal Retinal Vessel Segmentation from Spectral-Domain Optical Coherence Tomography and Fundus Photography
      Segmenting retinal vessels in optic nerve head (ONH) centered spectral-domain optical coherence tomography (SD-OCT) volumes is particularly challenging due to the projected neural canal opening (NCO) and relatively low visibility in the ONH center. Color fundus photographs provide a relatively high vessel contrast in the region inside the NCO, but have not been previously used to aid the SD-OCT vessel segmentation process. Thus, in this paper, we present two approaches ...
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    9. 1-14 of 14
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  2. About Zhihong Hu

    Zhihong Hu

    Zhihong/Jewel Hu is a Scientist/Senior Image Processing Research Engineer Doheny Eye Institute University of California, Los Angeles USA.