1. Johannes Kepler University of Linz

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    1. Mentioned In 45 Articles

    2. In Situ Detection of Interfacial Flow Instabilities in Polymer Co-Extrusion Using Optical Coherence Tomography and Ultrasonic Techniques

      In Situ Detection of Interfacial Flow Instabilities in Polymer Co-Extrusion Using Optical Coherence Tomography and Ultrasonic Techniques
      Co-extrusion is a widely used processing technique for combining various polymers with different properties into a tailored multilayer product. Individual melt streams are combined in a die to form the desired shape. Under certain conditions, interfacial flow instabilities are observed; however, fundamental knowledge about their onset and about critical conditions in science and industry is scarce. Since reliable identification of interfacial co-extrusion flow instabilities is essential for successful operation, this ...
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    3. 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
      ...s of data access request. The ethics committee responsible is: Ethics Committee of the Medical Faculty of the Johannes Kepler University Linz. Address: Kepler University Clinic, Neuromed Campus, Wagner-Jauregg-Weg 15, 40...
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    4. 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 ...
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    5. Artificial Intelligence Algorithms to Diagnose Glaucoma and Detect Glaucoma Progression: Translation to Clinical Practice

      Artificial Intelligence Algorithms to Diagnose Glaucoma and Detect Glaucoma Progression: Translation to Clinical Practice
      Purpose : This concise review aims to explore the potential for the clinical implementation of artificial intelligence (AI) strategies for detecting glaucoma and monitoring glaucoma progression. Methods : Nonsystematic literature review using the search combinations Artificial Intelligence, Deep Learning, Machine Learning, Neural Networks, Bayesian Networks, Glaucoma Diagnosis, and Glaucoma Progression. Information on sensitivity and specificity regarding glaucoma diagnosis and progression analysis as well as methodological details were extracted. Results : Numerous AI strategies ...
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    6. Impact of segmentation density on spectral domain optical coherence tomography assessment in Stargardt disease

      Impact of segmentation density on spectral domain optical coherence tomography assessment in Stargardt disease
      Purpose Automated spectral domain optical coherence tomography (SD-OCT) segmentation algorithms currently do not perform well in segmenting individual intraretinal layers in eyes with Stargardt disease (STGD). We compared selective B-scan segmentation strategies for generating mean retinal layer thickness and preserved area data from SD-OCT scans in patients with STGD1. Methods Forty-five eyes from 40 Stargardt patients were randomly selected from the ongoing Natural History of the Progression of Atrophy Secondary ...
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    7. Full-field optical coherence tomography in a balanced detection mode

      Full-field optical coherence tomography in a balanced detection mode
      We discuss balanced time-domain full-field optical coherence tomography (FF-OCT) realized in a MachZehnder configuration. The balanced detection scheme and spatial phase shifting allow single-shot acquisition and reconstruction in FF-OCT. Combined with a 2D quadrature signal-based demodulation technique applying the Riesz transform, previously illustrated for a dual-shot temporal phase shifting in FF-OCT, we demonstrate the concept for single-shot spatial phase shifting. The monitoring of dynamic processes by time-domain FF-OCT is enabled ...
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    8. Impact of Preinjection Spectral Domain Optical Coherence Tomography Findings in the Use of Intravitreal Ocriplasmin in a Clinical Setting

      Impact of Preinjection Spectral Domain Optical Coherence Tomography Findings in the Use of Intravitreal Ocriplasmin in a Clinical Setting
      To investigate the impact of spectral domain optical coherence tomography (SD-OCT) morphological predictive markers on visual acuity and outcome using ocriplasmin for macular hole and vitreomacular traction syndrome. Methods: A series of 40 patients in a retrospective study received intravitreal ocriplasmin. The primary endpoint was defined as morphological resolution of vitreomacular traction or closure of a macular hole. We analyzed the impact of pre- and postinjection SD-OCT findings on the ...
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    9. Corneal Epithelial Remodeling Induced by Small Incision Lenticule Extraction (SMILE)

      Corneal Epithelial Remodeling Induced by Small Incision Lenticule Extraction (SMILE)
      Purpose : To assess the reactive changes of the corneal epithelial thickness (ET) profile induced by small incision lenticule extraction (SMILE) for treatment of myopia. Methods : This prospective observational study included 46 eyes of 23 patients that were scheduled for myopic SMILE. High-resolution spectral-domain optical coherence tomography (SD-OCT) and a custom image segmentation algorithm were applied to measure corneal ET at multiple time points within the central 5-mm zone. Postoperative ET ...
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    10. Semiautomated SD-OCT Measurements of Corneal Sublayer Thickness in Normal and Post-SMILE Eyes

      Semiautomated SD-OCT Measurements of Corneal Sublayer Thickness in Normal and Post-SMILE Eyes
      Purpose: To test the reliability of a novel algorithm for measuring corneal epithelial thickness (ET) and stromal thickness of normal eyes and post-small incision lenticule extraction (SMILE) corneas with spectral-domain optical coherence tomography. Methods: In this prospective observational study, a customized semiautomated software algorithm was developed and applied to measure corneal ET and stromal thickness along the horizontal corneal meridian. Measurements were performed by 2 examiners in a randomized fashion ...
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    11. Optical coherence tomography based particle image velocimetry (OCT-PIV) of polymer flows

      Optical coherence tomography based particle image velocimetry (OCT-PIV) of polymer flows
      The measurement of spatially resolved velocity distributions is crucial for modelling flow and for understanding properties of materials produced in extrusion processes. Traditional methods for flow visualization such as particle image velocimetry (PIV) rely on optically transparent media and cannot be applied to turbid polymer melts. Here we present optical coherence tomography as an imaging technique for PIV data processing that allows for measuring a sequence of time resolved images ...
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  2. About Johannes Kepler University of Linz

    Johannes Kepler University of Linz

    Johannes Kepler University of Linz is an impulse center for science and the community and prides itself on a very distinguished international reputation. The university is the largest academic institution in the federal state of Upper Austria. The university’s core areas include the Social Sciences, Economics and Business, Law as well as Engineering and Natural Sciences.