1. Medical University of Vienna

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    1. Mentioned In 463 Articles

    2. U-Net with Spatial Pyramid Pooling for Drusen Segmentation in Optical Coherence Tomography

      Explore Home - Springer Ophthalmology
      U-Net with Spatial Pyramid Pooling for Drusen Segmentation in Optical Coherence Tomography
      The presence of drusen is the main hallmark of early/intermediate age-related macular degeneration (AMD). Therefore, automated drusen segmentation is an important step in image-guided management of AMD. There are two common approaches to drusen segmentation. In the first, the drusen are segmented directly as a binary classification task. In the second approach, the surrounding retinal layers (outer boundary retinal pigment epithelium (OBRPE) and Bruchs membrane (BM)) are segmented and ...
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      Mentions: Medical University of Vienna Ursula Schmidt-Erfurth

    3. A Deep Learning Approach to Denoise Optical Coherence Tomography Images of the Optic Nerve Head

      Explore Nature Publishing Group Ophthalmology
      A Deep Learning Approach to Denoise Optical Coherence Tomography Images of the Optic Nerve Head
      Optical coherence tomography (OCT) has become an established clinical routine for the in vivo imaging of the optic nerve head (ONH) tissues, that is crucial in the diagnosis and management of various ocular and neuro-ocular pathologies. However, the presence of speckle noise affects the quality of OCT images and its interpretation. Although recent frame-averaging techniques have shown to enhance OCT image quality, they require longer scanning durations, resulting in patient ...
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      Mentions: Medical University of Vienna Singapore Eye Research Institute Nanyang Technological University

    4. Comparison of optical coherence tomography angiography and narrow-band imaging using a bimodal endoscope

      Explore SPIE Digital Library Gastroenterology , Probes
      Comparison of optical coherence tomography angiography and narrow-band imaging using a bimodal endoscope
      We present coregistered images of tissue vasculature that allow a direct comparison between the performance of narrow-band imaging (NBI) and optical coherence tomography angiography (OCTA). Images were generated with a bimodal endomicroscope having a size of 152.43.3mm 3 ( l , w , h ) that combines two imaging channels. The white light imaging channel was used to perform NBI, the current gold standard for endoscopic visualization of vessels. The second channel ...
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      Mentions: Rainer A. Leitgeb Wolfgang Drexler Medical University of Vienna

    5. Histologic Correlation of Pig Retina Radial Stratification with Ultrahigh-Resolution Optical Coherence Tomography

      Explore IOVS Journal
      Histologic Correlation of Pig Retina Radial Stratification with Ultrahigh-Resolution Optical Coherence Tomography
      purpose. To compare ultrahigh-resolution optical coherence tomography (OCT) cross-sectional images of the pig retina with histology, to evaluate the potential of ultrahigh-resolution OCT for enhanced visualization of intra- and subretinal structures. methods. Ultrahigh-resolution OCT images were acquired with 1.4-m axial 3-m transverse resolution from in vitro posterior eyecup preparations of the domestic pig. Frozen sections were obtained in precise alignment with OCT tomograms, by using major blood vessels as ...
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      Mentions: Wolfgang Drexler Medical University of Vienna Harald Sattmann

    6. Comparison of optical coherence tomography and high frequency ultrasound imaging in mice for the assessment of skin morphology and intradermal volumes

      Explore Nature Publishing Group Dermatology
      Comparison of optical coherence tomography and high frequency ultrasound imaging in mice for the assessment of skin morphology and intradermal volumes
      Optical coherence tomography (OCT) and high-frequency ultrasound (HFUS), two established imaging modalities in the field of dermatology, were evaluated and compared regarding their applicability for visualization of skin tissue morphology and quantification of murine intradermal structures. The accuracy and reproducibility of both methods were assessed ex vivo and in vivo using a standardized model for intradermal volumes based on injected soft tissue fillers. OCT revealed greater detail in skin morphology ...
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      Mentions: Medical University of Vienna

    7. Light-induced changes of the subretinal space of the temporal retina observed via optical coherence tomography

      Explore Nature Publishing Group Ophthalmology
      Light-induced changes of the subretinal space of the temporal retina observed via optical coherence tomography
      Photoreceptor function is impaired in many retinal diseases like age-related macular degeneration. Currently, assessment of the photoreceptor function for the early diagnosis and monitoring of these diseases is either subjective, as in visual field testing, requires contact with the eye, like in electroretinography, or relies on research prototypes with acquisition speeds unattained by conventional imaging systems. We developed an objective, noncontact method to monitor photoreceptor function using a standard optical ...
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      Mentions: Medical University of Vienna

    8. Systematic ultrastructural comparison of swept-source and full-depth spectral domain optical coherence tomography imaging of diabetic macular oedema

      Explore BJO Online Ophthalmology
      Systematic ultrastructural comparison of swept-source and full-depth spectral domain optical coherence tomography imaging of diabetic macular oedema
      Background/Aims Optical coherence tomography (OCT) is commonly used to diagnose and assess diabetic macular oedema (DME). Swept-source OCT (SS-OCT) promises improved imaging depth and more independence from media opacities. Heidelberg Spectralis full-depth imaging (FDI) combines details at different depths to one representation. The aim of this study was to determine the comparability of the imaging methods concerning DME ultrastructure. Methods Two graders assessed the presence of typical DME phenomena ...
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      Mentions: Medical University of Vienna Ursula Schmidt-Erfurth

    10. Characterization of dry eye disease in a mouse model by optical coherence tomography and fluorescein staining

      Explore OSA | OSA Publishing Ophthalmology
      Characterization of dry eye disease in a mouse model by optical coherence tomography and fluorescein staining
      A custom-built ultrahigh-resolution optical coherence tomography (UHR-OCT) system and fluorescein staining were employed for investigation of a scopolamine induced dry eye mouse model. Acquired data was used to evaluate common and complementary findings of the two modalities. Central corneal thickness as measured by UHR-OCT increased significantly over the study period of 24 hours, from 89.03.57 m to 92.24.07 m. Both techniques were able to show corneal ...
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      Mentions: Duke University Medical University of Vienna Singapore Eye Research Institute

    11. Polarization-sensitive imaging with simultaneous bright- and dark-field optical coherence tomography

      Explore OSA | OSA Publishing
      Polarization-sensitive imaging with simultaneous bright- and dark-field optical coherence tomography
      We present a polarization-sensitive (PS) extension for bright- and dark-field (BRAD) optical coherence tomography imaging. Using a few-mode fiber detection scheme, the light backscattered at different angles is separated, and the BRAD images of tissue scattering are generated. A calibration method to correct for the fiber birefringence is proposed. Since particle scattering profiles are polarization dependent, a PS detection extends the capabilities for investigating the scattering properties of biological tissues ...
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      Mentions: Christoph K. Hitzenberger Medical University of Vienna Bernhard Baumann

    12. An amplified-target loss approach for photoreceptor layer segmentation in pathological OCT scans

      Explore arxiv.org Ophthalmology
      An amplified-target loss approach for photoreceptor layer segmentation in pathological OCT scans
      Segmenting anatomical structures such as the photoreceptor layer in retinal optical coherence tomography (OCT) scans is challenging in pathological scenarios. Supervised deep learning models trained with standard loss functions are usually able to characterize only the most common disease appeareance from a training set, resulting in suboptimal performance and poor generalization when dealing with unseen lesions. In this paper we propose to overcome this limitation by means of an augmented ...
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      Mentions: Medical University of Vienna Ursula Schmidt-Erfurth

    13. Relationship between Neovascular Density in Swept Source-Optical Coherence Tomography Angiography and Signs of Activity in Exudative Age-Related Macular Degeneration

      Explore Hindawi Publishing Corporation Ophthalmology
      Relationship between Neovascular Density in Swept Source-Optical Coherence Tomography Angiography and Signs of Activity in Exudative Age-Related Macular Degeneration
      Purpose . To assess the relationship between signs of activity in exudative neovascular age-related macular degeneration (nAMD) following anti-vascular endothelial growth factor (anti-VEGF) treatment and morphology of choroidal neovascularization (CNV) based on neovascular density as imaged using swept source-optical coherence tomography angiography (SS-OCTA) in a qualitative manner. Methods . A single-cohort retrospective data analysis from one tertiary eye care center. Seventy-seven eyes of 72 patients were included and their charts reviewed which ...
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      Mentions: Medical University of Vienna University of Graz

    14. Multiclass segmentation as multitask learning for drusen segmentation in retinal optical coherence tomography

      Explore arxiv.org Ophthalmology
      Multiclass segmentation as multitask learning for drusen segmentation in retinal optical coherence tomography
      Automated drusen segmentation in retinal optical coherence tomography (OCT) scans is relevant for understanding age-related macular degeneration (AMD) risk and progression. This task is usually performed by segmenting the top/bottom anatomical interfaces that define drusen, the outer boundary of the retinal pigment epithelium (OBRPE) and the Bruch's membrane (BM), respectively. In this paper we propose a novel multi-decoder architecture that tackles drusen segmentation as a multitask problem. Instead ...
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      Mentions: Bioptigen Medical University of Vienna Ursula Schmidt-Erfurth

    15. Comparison of Intensity- and Polarization-based Contrast in Amyloid-beta Plaques as Observed by Optical Coherence Tomography

      Explore MDPI Open Access Journals Platform Neurology
      Comparison of Intensity- and Polarization-based Contrast in Amyloid-beta Plaques as Observed by Optical Coherence Tomography
      One key hallmark of Alzheimers disease (AD) is the accumulation of extracellular amyloid-beta protein in cortical regions of the brain. For a definitive diagnosis of AD, post-mortem histological analysis, including sectioning and staining of different brain regions, is required. Here, we present optical coherence tomography (OCT) as a tissue-preserving imaging modality for the visualization of amyloid-beta plaques and compare their contrast in intensity- and polarization-sensitive (PS) OCT. Human brain samples ...
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      Mentions: Christoph K. Hitzenberger Medical University of Vienna Bernhard Baumann

    16. Progress in Multimodal En Face Imaging: feature introduction

      Explore OSA | OSA Publishing
      Progress in Multimodal En Face Imaging: feature introduction
      This feature issue contains papers that report on the most recent advances in the field of en face optical coherence tomography (OCT) and of combinations of modalities facilitated by the en face view. Hardware configurations for delivery of en face OCT images are described as well as specific signal and image processing techniques tailored to deliver relevant clinical diagnoses. The value of the en face perspective for enabling multimodality is ...
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      Mentions: Joseph A. Izatt Duke University Adrian G. Podoleanu
    17. 1-15 of 463 1 2 3 4 ... 29 30 31 »
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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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      140 articles also mentioned Christoph K. Hitzenberger
    2. Intravitreal avastin for macular edmema secondary to retinal vein occlusion - a prospective study.
      132 articles also mentioned Ursula Schmidt-Erfurth
    3. Simultaneous SLO/OCT imaging of the human retina with axial eye motion correction
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      97 articles also mentioned Rainer A. Leitgeb
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