1. Medical University of Vienna

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    1. Mentioned In 528 Articles

    2. A pilot study investigating anterior segment optical coherence tomography angiography as a non-invasive tool in evaluating corneal vascularisation

      Explore Nature Publishing Group Ophthalmology
      A pilot study investigating anterior segment optical coherence tomography angiography as a non-invasive tool in evaluating corneal vascularisation
      The current assessment of corneal vascularisation (CV) relies on slit-lamp examination, which may be subjective. Dye-based angiographies, like indocyanine green angiography (ICGA), allows for good visualisation of anterior segment blood vessels. However, ICGA is invasive and can be associated with systemic adverse effects. Anterior segment optical coherence tomography angiography (AS-OCTA) is a non-invasive tool that has been shown to successfully delineate CV. However, there are no previous studies that have ...
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      Mentions: Medical University of Vienna Singapore Eye Research Institute Nanyang Technological University

    3. Towards ultrahigh resolution OCT based endoscopical pituitary gland and adenoma screening: a performance parameter evaluation

      Explore OSA | OSA Publishing
      Towards ultrahigh resolution OCT based endoscopical pituitary gland and adenoma screening: a performance parameter evaluation
      Ultrahigh resolution optical coherence tomography (UHR-OCT) for differentiating pituitary gland versus adenoma tissue has been investigated for the first time, indicating more than 80% accuracy. For biomarker identification, OCT images of paraffin embedded tissue are correlated to histopathological slices. The identified biomarkers are verified on fresh biopsies. Additionally, an approach, based on resolution modified UHR-OCT ex vivo data, investigating optical performance parameters for the realization in an in vivo endoscope ...
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      Mentions: Rainer A. Leitgeb Wolfgang Drexler Medical University of Vienna

    4. Three-dimensional composition of the photoreceptor cone layers in healthy eyes using adaptive-optics optical coherence tomography (AO-OCT)

      Explore Journals | PLOS Ophthalmology
      Three-dimensional composition of the photoreceptor cone layers in healthy eyes using adaptive-optics optical coherence tomography (AO-OCT)
      ...ed approach of counting? This prospective case series using AO-OCT on healthy individuals was approved by the Medical University of Vienna institutional review board. The study was conducted between October 1st, 2018 and...
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      Mentions: Wolfgang Drexler Michael Pircher Medical University of Vienna

    5. Toward optical coherence tomography on a chip: in vivo three-dimensional human retinal imaging using photonic integrated circuit-based arrayed waveguide gratings

      Explore Nature Publishing Group Ophthalmology
      Toward optical coherence tomography on a chip: in vivo three-dimensional human retinal imaging using photonic integrated circuit-based arrayed waveguide gratings
      In this work, we present a significant step toward in vivo ophthalmic optical coherence tomography and angiography on a photonic integrated chip. The diffraction gratings used in spectral-domain optical coherence tomography can be replaced by photonic integrated circuits comprising an arrayed waveguide grating. Two arrayed waveguide grating designs with 256 channels were tested, which enabled the first chip-based optical coherence tomography and angiography in vivo three-dimensional human retinal measurements. Design ...
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      Mentions: Rainer A. Leitgeb Wolfgang Drexler Medical University of Vienna

    6. Three-dimensional assessment of para- and perifoveal photoreceptor densities and the impact of meridians and age in healthy eyes with adaptive-optics optical coherence tomography (AO-OCT)

      Explore OSA | OSA Publishing Ophthalmology
      Three-dimensional assessment of para- and perifoveal photoreceptor densities and the impact of meridians and age in healthy eyes with adaptive-optics optical coherence tomography (AO-OCT)
      An adaptive optics optical coherence tomography (AO-OCT) system is used to assess sixty healthy eyes of thirty subjects (age 22 to 75) to evaluate how the outer retinal layers, foveal eccentricity and age effect the mean cone density. The cone mosaics of different retinal planes (the cone inner segment outer segment junction (IS/OS), the cone outer segment combined with the IS/OS (ISOS+), the cone outer segment tips (COST ...
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      Mentions: Wolfgang Drexler Michael Pircher Medical University of Vienna

    7. Deliberations of an International Panel of Experts on OCTA Nomenclature of nAMD

      Explore Ophthalmology Ophthalmology
      Deliberations of an International Panel of Experts on OCTA Nomenclature of nAMD
      A panel of imaging experts was assembled to review neovascular age-related macular degeneration optical coherence tomography angiography descriptors published to date, and test agreement on use of these terms, which was found to be low. Optical coherence tomography angiography (OCTA) has been used to identify and characterize macular neovascularization (MNV) secondary to age-related macular degeneration (AMD). 1-4 Many studies have explored OCTA morphological features of MNV that might serve as ...
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      Mentions: Philip J. Rosenfeld Massachusetts Institute of Technology James G. Fujimoto

    8. Improved accuracy of quantitative birefringence imaging by polarization sensitive OCT with simple noise correction and its application to neuroimaging

      Explore Wiley Online Library Neurology
      Improved accuracy of quantitative birefringence imaging by polarization sensitive OCT with simple noise correction and its application to neuroimaging
      Polarization-sensitive optical coherence tomography (PS-OCT) enables three dimensional imaging of biological tissues based on the inherent contrast provided by scattering and polarization properties. In fibrous tissue such as the white matter of the brain, PS-OCT allows quantitative mapping of tissue birefringence. For the popular PS-OCT layout using a single circular input state, birefringence measurements are based on a straight-forward evaluation of phase retardation data. However, the accuracy of these measurements ...
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      Mentions: Medical University of Vienna Bernhard Baumann Antonia Lichtenegger

    9. Effect of vessel enhancement filters on the repeatability of measurements obtained from widefield swept-source optical coherence tomography angiography

      Explore Nature Publishing Group Ophthalmology
      Effect of vessel enhancement filters on the repeatability of measurements obtained from widefield swept-source optical coherence tomography angiography
      We assessed the inter-visit repeatability of 15 9-mm 2 swept-source OCTA (SS-OCTA; PLEX Elite 9000, Carl Zeiss Meditec) metrics in 14 healthy participants. We analysed the perfusion density (PD) of large vessels, superficial capillary plexus (SCP), and deep capillary plexus (DCP) as well as choriocapillaris flow voids in 2 different regions: the macular region and peripheral region. Also, retinal plexus metrics were processed further using different filters (Hessian, Gabor and ...
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      Mentions: Medical University of Vienna Carl Zeiss Meditec National University of Singapore

    10. Intraretinal microvascular changes after ERM and ILM peeling using SSOCTA

      Explore Journals | PLOS Ophthalmology
      Intraretinal microvascular changes after ERM and ILM peeling using SSOCTA
      Background To prospectively investigate retinal vascular changes in patients undergoing epiretinal membrane (ERM) and internal limiting membrane (ILM) peeling using swept source optical coherence tomography angiography (SSOCTA). Methods Consecutive patients were grouped based on ERM severity and followed using SSOCTA up to month 3 after surgical intervention. Superficial and deep foveal avascular zone (s/dFAZ) as well as foveal and parafoveal vessel density (VD) were correlated with ERM severity and ...
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      Mentions: Medical University of Vienna Ursula Schmidt-Erfurth Stefan G. Sacu

    11. Effect of spectral leakage on the image formation of Fourier-domain optical coherence tomography

      Explore OSA | OSA Publishing
      Effect of spectral leakage on the image formation of Fourier-domain optical coherence tomography
      We report on the investigation of spectral leakages impact on the reconstruction of Fourier-domain optical coherence tomography (FD-OCT). We discuss the shift-variant nature introduced by the spectral leakage and develop a novel spatial-domain FD-OCT image formation model. A proof-of-concept phantom experiment is conducted to validate our model. Compared with previous models, the proposed framework could better describe the image formation process, especially when the fineness of the axial structure approaches ...
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      Mentions: University of Alabama Medical University of Vienna Singapore Eye Research Institute

    12. Ultra-high-resolution 3D optical coherence tomography reveals inner structures of human placenta-derived trophoblast organoids

      Explore IEEE Xplore
      Ultra-high-resolution 3D optical coherence tomography reveals inner structures of human placenta-derived trophoblast organoids
      Objective: 3D optical coherence tomography (OCT) is used for analyses of human placenta organoids in situ without sample preparation. Methods: The trophoblast organoids analyzed were derived from primary human trophoblast. In this study a custom made ultra-high-resolution spectral domain OCT system with uniform spatial and axial resolution of 2.48 m in organoid tissue was used. The obtained OCT results align to differentiation status tested via quantitative polymerase chain reaction ...
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      Mentions: Rainer A. Leitgeb Wolfgang Drexler Medical University of Vienna

    13. Generating large field of view en-face projection images from intra-acquisition motion compensated volumetric optical coherence tomography data

      Explore OSA | OSA Publishing Ophthalmology
      Generating large field of view en-face projection images from intra-acquisition motion compensated volumetric optical coherence tomography data
      A technique to generate large field of view projection maps of arbitrary optical coherence tomography (OCT) data is described. The technique is divided into two stages - an image acquisition stage that features a simple to use fast and robust retinal tracker to get motion free retinal OCT volume scans - and a stitching stage where OCT data from different retinal locations is first registered against a reference image using a custom ...
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      Mentions: Christoph K. Hitzenberger Michael Pircher Medical University of Vienna

    14. Analysis of retinal nerve fiber layer birefringence in patients with glaucoma and diabetic retinopathy by polarization sensitive OCT

      Explore OSA | OSA Publishing Ophthalmology
      Analysis of retinal nerve fiber layer birefringence in patients with glaucoma and diabetic retinopathy by polarization sensitive OCT
      The retinal nerve fiber layer (RNFL) is a fibrous tissue that shows form birefringence. This optical tissue property is related to the microstructure of the nerve fiber axons that carry electrical signals from the retina to the brain. Ocular diseases that are known to cause neurologic changes, like glaucoma or diabetic retinopathy (DR), might alter the birefringence of the RNFL, which could be used for diagnostic purposes. In this pilot ...
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      Mentions: Christoph K. Hitzenberger Michael Pircher Medical University of Vienna

    15. Digital Wavefront Sensing

      Explore Home - ClinicalTrials.gov Ophthalmology , Clinical Trials
      Digital Wavefront Sensing
      H-OCT will be tested in this study for its suitability for the qualitative investigation of aberrometry. We aim to achieve a digital equivalent for wavefront calculation of the widespread analog procedure commonly used with conventional wavefront-aberrometers. The results will be compared with those from a conventional analog wavefront calculation method. In the course of this pilot study, 20 eyes of phakic and 10 eyes of pseudophakic subjects with suspected higher ...
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      Mentions: Medical University of Vienna

    16. Detection rate of diabetic macular microaneurysms comparing dye-based angiography and optical coherence tomography angiography

      Explore Nature Publishing Group Ophthalmology
      Detection rate of diabetic macular microaneurysms comparing dye-based angiography and optical coherence tomography angiography
      Diabetic maculopathy (DM) is a microvascular dysfunction clinically characterized by microaneurysms (MA) leading to edema and central visual deprivation. This prospective explorative study investigated 27 eyes of 17 patients with DM by fluorescein/indocyanine green angiography (FA/ICGA; SPECTRALIS HRA-OCT, Heidelberg Engineering) and by swept source-optical coherence tomography angiography (SS-OCTA; DRI-OCT Triton Plus, Topcon) to identify clinically relevant MAs. The SS-OCTA cubes were split into the superficial capillary plexus (SCP ...
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      Mentions: Heidelberg Engineering Topcon Medical Systems Medical University of Vienna
    17. 1-15 of 528 1 2 3 4 ... 34 35 36 »
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  4. About Medical University of Vienna

    Medical University of Vienna

    Medical University of Vienna.  In its structuring and alignment the Medical University of Vienna relies on the "triple track" strategy. Research, education and patient care represent the three cornerstones of the university's system. Center for Biomedical Engineering and Physics, Medical University of Vienna, Austria.  The Biomedical Engineering Group at the Department of Biomedical Engineering of the Medical School, University of Vienna, is situated in the University Hospital of Vienna, which is the biggest hospital of Austria, and one of the biggest in Europe. The Biomedical Engineering Group was concentrated here to promote medical research with modern technical means.

  5. Related Topics

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    3. Simultaneous SLO/OCT imaging of the human retina with axial eye motion correction
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