1. Articles from Dominika Podkowinski

    1-5 of 5
    1. A Swept source optical coherence tomography angiography study: Imaging artifacts and comparison of non-perfusion areas with fluorescein angiography in diabetic macular edema

      A Swept source optical coherence tomography angiography study: Imaging artifacts and comparison of non-perfusion areas with fluorescein angiography in diabetic macular edema

      Purpose Swept Source Optical coherence tomography angiography (SS-OCTA) is a novel technique to visualize perfusion and vascular changes like ischemia in patients with diabetic retinopathy. The aim of this study was to compare non-perfusion areas on conventional fluorescein angiography (FA) with those on SS-OCTA using detailed manual annotation in patients with diabetic macular edema (DME) and to evaluate possible artifacts caused by DME on SS-OCTA. Methods 27 eyes of 21 patients with DME were analyzed in this prospective, cross-sectional study; on all, standard ophthalmological examination, SS-OCTA and FA imaging were performed. Early-phase FA and SS-OCTA images were analyzed for capillary ...

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    2. Early alterations in retinal microvasculature on swept-source optical coherence tomography angiography in acute central serous chorioretinopathy

      Early alterations in retinal microvasculature on swept-source optical coherence tomography angiography in acute central serous chorioretinopathy

      The purpose of the study was to evaluate the retinal blood flow in patients with acute central serous chorioretinopathy (CSC) over an observational period of 1 month using swept-source optical coherence tomography (SS-OCTA), focusing especially on changes in the area of subretinal fluid (A-SRF). We correlated these findings with conventional indocyanine green angiography (ICGA). ICGA and SS-OCTA images were collected and analyzed of 12 eyes of 12 patients. The A-SRF was annotated and a qualitative analysis of choriocapillaris, the vessel density (VD) and perfusion density (PD) of the retinal superficial capillary plexus (SCP) and the deep capillary plexus (DCP) was ...

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    3. Comparison of Quantitative Parameters in Diabetics Without Clinical Signs of Diabetic Retinopathy and Healthy Individuals Using Swept-source Optical Coherence Tomography Angiography

      Comparison of Quantitative Parameters in Diabetics Without Clinical Signs of Diabetic Retinopathy and Healthy Individuals Using Swept-source Optical Coherence Tomography Angiography

      Automated image analysis is the future for retinal imaging in order to early diagnose retinal diseases like diabetic retinopathy. Swept source coherence tomography angiography offers new insights in retinal vascularization. Data sets for each stage of diabetic retinopathy are crucial to compare findings to the healthy population and to develop further algorithms. We recruited 39 eyes of Type-2 diabetics without diabetic retinopathy comparing them to 43 eyes of age and gender matched individuals using swept source coherence tomography angiography. Vessel and perfusion density in the superficial and deep retinal plexus, as well foveal-avascular zone expansion, using Macular Density V 0 ...

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    4. Multivendor Spectral-Domain Optical Coherence Tomography Dataset, Observer Annotation Performance Evaluation, and Standardized Evaluation Framework for Intraretinal Cystoid Fluid Segmentation

      Multivendor Spectral-Domain Optical Coherence Tomography Dataset, Observer Annotation Performance Evaluation, and Standardized Evaluation Framework for Intraretinal Cystoid Fluid Segmentation

      Development of image analysis and machine learning methods for segmentation of clinically significant pathology in retinal spectral-domain optical coherence tomography (SD-OCT), used in disease detection and prediction, is limited due to the availability of expertly annotated reference data. Retinal segmentation methods use datasets that either are not publicly available, come from only one device, or use different evaluation methodologies making them difficult to compare. Thus we present and evaluate a multiple expert annotated reference dataset for the problem of intraretinal cystoid fluid (IRF) segmentation, a key indicator in exudative macular disease. In addition, a standardized framework for segmentation accuracy evaluation ...

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    5. Choroidal thickness maps from spectral domain and swept source optical coherence tomography: algorithmic versus ground truth annotation

      Choroidal thickness maps from spectral domain and swept source optical coherence tomography: algorithmic versus ground truth annotation

      Background/aims The purpose of the study was to create a standardised protocol for choroidal thickness measurements and to determine whether choroidal thickness measurements made on images obtained by spectral domain optical coherence tomography (SD-OCT) and swept source (SS-) OCT from patients with healthy retina are interchangeable when performed manually or with an automatic algorithm. Methods 36 grid cell measurements for choroidal thickness for each volumetric scan were obtained, which were measured for SD-OCT and SS-OCT with two methods on 18 eyes of healthy volunteers. Manual segmentation by experienced retinal graders from the Vienna Reading Center and automated segmentation on ...

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    1-5 of 5
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    1. (2 articles) Johannes Kepler University of Linz
    2. (2 articles) Medical University of Vienna
    3. (2 articles) Carl Zeiss Meditec
    4. (1 articles) Harvard University
    5. (1 articles) University of Iowa
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    Choroidal thickness maps from spectral domain and swept source optical coherence tomography: algorithmic versus ground truth annotation Multivendor Spectral-Domain Optical Coherence Tomography Dataset, Observer Annotation Performance Evaluation, and Standardized Evaluation Framework for Intraretinal Cystoid Fluid Segmentation Comparison of Quantitative Parameters in Diabetics Without Clinical Signs of Diabetic Retinopathy and Healthy Individuals Using Swept-source Optical Coherence Tomography Angiography Early alterations in retinal microvasculature on swept-source optical coherence tomography angiography in acute central serous chorioretinopathy A Swept source optical coherence tomography angiography study: Imaging artifacts and comparison of non-perfusion areas with fluorescein angiography in diabetic macular edema Trojan-Horse Diameter-Reducible Nanotheranostics for Macroscopic/Microscopic Imaging-Monitored Chemo-Antiangiogenic Therapy Thickness of retinal pigment epithelium–Bruch’s membrane complex in adult Chinese using optical coherence tomography Interocular symmetry of optical coherence tomography parameters in healthy children and adolescents Fluorescein Leakage and Optical Coherence Tomography Angiography Features of Microaneurysms in Diabetic Retinopathy Cross-free in both lateral and axial directions Fourier-domain full-field optical coherence tomography Microperimetry, Humphrey field analyzer, and optical coherence tomography in detecting glaucoma: a comparative performance study Scanning optimization of an electrothermally-actuated MEMS mirror for applications in optical coherence tomography endoscopy