1. Medical University of Vienna

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    1. Mentioned In 359 Articles

    2. Polarization sensitive optical coherence tomography – a review [Invited]

      Polarization sensitive optical coherence tomography – a review [Invited]
      Optical coherence tomography (OCT) is now a well-established modality for high-resolution cross-sectional and three-dimensional imaging of transparent and translucent samples and tissues. Conventional, intensity based OCT, however, does not provide a tissue-specific contrast, causing an ambiguity with image interpretation in several cases. Polarization sensitive (PS) OCT draws advantage from the fact that several materials and tissues can change the lights polarization state, adding an additional contrast channel and providing quantitative ...
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    3. Ultrahigh-resolution OCT imaging of the human cornea

      Ultrahigh-resolution OCT imaging of the human cornea
      We present imaging of corneal pathologies using optical coherence tomography (OCT) with high resolution. To this end, an ultrahigh-resolution spectral domain OCT (UHR-OCT) system based on a broad bandwidth Ti:sapphire laser is employed. With a central wavelength of 800 nm, the imaging device allows to acquire OCT data at the central, paracentral and peripheral cornea as well as the limbal region with 1.2 m x 20 m (axial ...
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    4. Visible light spectral domain optical coherence microscopy system for ex vivo imaging

      Visible light spectral domain optical coherence microscopy system for ex vivo imaging
      A visible light spectral domain optical coherence microscopy system operating in the wavelength range of 450-680 nm was developed. The resulting large wavelength range of 230 nm enabled an ultrahigh axial resolution of 0.88m in tissue. The setup consisted of a Michelson interferometer combined with a homemade spectrometer with a spectral resolution of 0.03 nm. Scanning of 1 x 1 mm 2 and 0.5 x 0.5 ...
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    5. Identification and clinical role of choroidal neovascularization characteristics based on optical coherence tomography angiography

      Identification and clinical role of choroidal neovascularization characteristics based on optical coherence tomography angiography
      Purpose To suggest a novel classification of neovascular age-related macular degeneration (AMD) based on optical coherence tomography angiography (OCTA) and to correlate morphological characteristics based on optical coherence tomography (OCT)/OCTA with clinical criteria of disease activity. Methods A total of 88 eyes with neovascular AMD (14 treatment-nave, 74 eyes following anti-vascular endothelial growth factor treatment (VEGF)) were examined using the AngioVue OCTA system (Optovue, Inc., Fremont, CA, USA) and ...
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    6. "Nobel prize for engineering sciences" goes to MedUni Vienna researchers

      "Nobel prize for engineering sciences" goes to MedUni Vienna researchers
      Christoph Hitzenberger and Adolf Fercher from MedUni Vienna have been awarded this years Fritz J. and Dolores H. Russ Prize. The prize is awarded by the United States National Academy of Engineering (NAE) for technological developments that "have had a significant impact on society and have helped to improve human well-being". The two researchers from Vienna played a major role in the development of Optical Coherence Tomography (OCT), an examination ...
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    7. Optical coherence tomography angiography in acute non-arteritic anterior ischaemic optic neuropathy

      Optical coherence tomography angiography in acute non-arteritic anterior ischaemic optic neuropathy
      Purpose To characterise vascular changes in eyes with acute non-arteritic anterior ischaemic optic neuropathy (NAION), using optical coherence tomography angiography (OCT-A) imaging. Methods This hospital-based observational case-control study included included five patients with acute NAION (6 eyes), within 7 days after onset of symptoms and 19 age-matched healthy controls (19 eyes). OCT-A (RTVue XR 100; Optovue, Fremont, California, USA), covering a 4.54.5 mm scan area, was used to ...
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    8. Active-passive path-length encoded (APPLE) Doppler OCT

      Active-passive path-length encoded (APPLE) Doppler OCT
      We present a novel active-passive path-length encoded (APPLE) swept source Doppler optical coherence tomography (DOCT) approach, enabling three-dimensional velocity vector reconstruction of moving particles without prior knowledge of the orientation of motion. The developed APPLE DOCT setup allows for non-invasive blood flow measurements in vivo and was primarily designed for quantitative human ocular blood flow investigations. The systems performance was demonstrated by in vitro flow phantom as well as in ...
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    9. Reproducibility of Retinal Thickness Measurements across Spectral-Domain Optical Coherence Tomography Devices using Iowa Reference Algorithm

      Reproducibility of Retinal Thickness Measurements across Spectral-Domain Optical Coherence Tomography Devices using Iowa Reference Algorithm
      PURPOSE: Establishing and obtaining consistent quantitative indices of retinal thickness from a variety of clinically used Spectral-Domain Optical Coherence Tomography scanners. DESIGN: Retinal images from five Spectral-Domain Optical Coherence Tomography scanners were used to determine total retinal thickness with scanner-specific correction factors establishing consistency of thickness measurement across devices. PARTICIPANTS: 55 Fovea-centered Spectral-Domain Optical Coherence Tomography volumes from eleven subjects were analyzed, obtained from Cirrus HD-OCT, RS-3000, Heidelberg Spectralis, RTVue ...
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    10. Posterior rat eye during acute intraocular pressure elevation studied using polarization sensitive optical coherence tomography

      Posterior rat eye during acute intraocular pressure elevation studied using polarization sensitive optical coherence tomography
      Polarization sensitive optical coherence tomography (PS-OCT) operating at 840 nm with axial resolution of 3.8 m in tissue was used for investigating the posterior rat eye during an acute intraocular pressure (IOP) increase experiment. IOP was elevated in the eyes of anesthetized Sprague Dawley rats by cannulation of the anterior chamber. Three dimensional PS-OCT data sets were acquired at IOP levels between 14 mmHg and 105 mmHg. Maps of ...
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    11. Visualization of micro-capillaries using optical coherence tomography angiography with and without adaptive optics

      Visualization of micro-capillaries using optical coherence tomography angiography with and without adaptive optics
      The purpose of this work is to investigate the benefits of adaptive optics (AO) technology for optical coherence tomography angiography (OCTA). OCTA has shown great potential in non-invasively enhancing the contrast of vessels and small capillaries. Especially the capability of the technique to visualize capillaries with a lateral extension that is below the transverse resolution of the system opens unique opportunities in diagnosing retinal vascular diseases. However, there are some ...
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    12. Comparative study between a spectral domain and a high-speed single-beam swept source OCTA system for identifying choroidal neovascularization in AMD

      Comparative study between a spectral domain and a high-speed single-beam swept source OCTA system for identifying choroidal neovascularization in AMD
      This comparative study between a SD- and SS-OCTA system for visualizing neovascular patterns in AMD, also assessed the influence of cataract on OCTA imaging. 25 eyes with active CNV (AMD) were documented by FA, ICGA and SD-OCT. Two OCTA devices were used: A custom built SS-OCTA (1050nm, 400,000 A-scans/s, 55mm, no image segmentation); AngioVue (OptoVue, CA, USA) SD-OCTA (840nm, 70.000 A-scans/s, 33mm, SSADA technology). Two retina ...
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    13. A view of the current and future role of optical coherence tomography in the management of age-related macular degeneration

      A view of the current and future role of optical coherence tomography in the management of age-related macular degeneration
      Optical coherence tomography (OCT) has become an established diagnostic technology in the clinical management of age-related macular degeneration (AMD). OCT is being used for primary diagnosis, evaluation of therapeutic efficacy, and long-term monitoring. Computer-based advances in image analysis provide complementary imaging tools such as OCT angiography, further novel automated analysis methods as well as feature detection and prediction of prognosis in disease and therapy by machine learning. In early AMD ...
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    14. 1-15 of 359 1 2 3 4 ... 22 23 24 »
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  2. 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.