Articles that mention Medical University of Vienna -Optical Coherence Tomography News

Medical University of Vienna

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1. Mentioned In 454 Articles
2. Polarization-sensitive imaging with simultaneous bright- and dark-field optical coherence tomography
  
  Explore OSA | OSA Publishing Aug 18 2019
  
  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
3. An amplified-target loss approach for photoreceptor layer segmentation in pathological OCT scans
  
  Explore arxiv.org Aug 10 2019 Ophthalmology
  
  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
4. 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 Jul 14 2019 Ophthalmology
  
  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
5. Multiclass segmentation as multitask learning for drusen segmentation in retinal optical coherence tomography
  
  Explore arxiv.org Jun 23 2019 Ophthalmology
  
  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
6. Comparison of Intensity- and Polarization-based Contrast in Amyloid-beta Plaques as Observed by Optical Coherence Tomography
  
  Explore MDPI Open Access Journals Platform May 22 2019 Neurology
  
  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
7. Progress in Multimodal En Face Imaging: feature introduction
  
  Explore OSA | OSA Publishing May 16 2019
  
  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
8. Automatic assessment of tear film and tear meniscus parameters in healthy subjects using ultrahigh-resolution optical coherence tomography
  
  Explore OSA | OSA Publishing May 14 2019 Ophthalmology
  
  Many different parameters exist for the investigation of tear film dynamics. We present a new tear meniscus segmentation algorithm which automatically extracts tear meniscus area (TMA), height (TMH), depth (TMD) and radius (TMR) from UHR-OCT measurements and apply it to a data set including repeated measurements from ten healthy subjects. Mean values and standard deviations are 0.0174 0.007 mm 2 , 0.272 0.069 mm, 0.191 0 ...
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  Mentions: Medical University of Vienna Singapore Eye Research Institute Angelika Unterhuber
9. ADAPTIVE OPTICS OPHTHALMOSCOPY CONFERENCE SEPTEMBER 4TH, PARIS
  
  Explore Optical Coherence Tomography News Apr 25 2019 Ophthalmology
  
  Late Summer Course - September 4 5, 2019 - Paris High resolution imaging technologies, exemplified by adaptive optics ophthalmoscopy (AOO) and optical coherence tomography (OCT) are progressively transferring from the lab to the clinic. This is an opportunity to better understand retinal diseases, to optimize their management but also to provide novel biomarkers for other medical specialities. However, there is still an unmet need in the field of clinical interpretation of AOO ...
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  Mentions: University of Pittsburgh Michael Pircher Medical University of Vienna
10. Impact of systemic vascular risk factors on the choriocapillaris using optical coherence tomography angiography in patients with systemic hypertension
  
  Explore Nature Publishing Group Apr 12 2019 Ophthalmology
  
  We investigated the characteristics of the choriocapillaris flow voids using optical coherence tomography angiography (OCTA) in 85 patients (164 eyes) with hypertension (meanSD age, 5611 years; 45% women; 20% poorly controlled BP; 16% diabetes) who are without ocular diseases and determined possible correlations with systemic vascular risk factors. Data on 24-hour ambulatory blood pressure (BP), serum creatinine, and urine microalbumin/creatinine ratio (MCR) were collected. Estimated glomerular filtration rate (eGFR ...
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  Mentions: Medical University of Vienna Singapore Eye Research Institute Tien Yin Wong
11. En face optical coherence tomography: a technology review [Invited]
  
  Explore OSA | OSA Publishing Apr 9 2019 Microscopy
  
  A review on the technological development of en face optical coherence tomography (OCT) and optical coherence microscopy (OCM) is provided. The terminology originally referred to time domain OCT, where the preferential scanning was performed in the en face plane. Potentially the fastest realization of en face image recording is full-field OCT, where the full en face plane is illuminated and recorded simultaneously. The term has nowadays been adopted for high-speed ...
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  Mentions: Rainer A. Leitgeb Medical University of Vienna
12. Comparison of Spectralis and Cirrus spectral domain optical coherence tomography for the objective morphometric assessment of the neuroretinal rim width
  
  Explore Home - Springer Apr 2 2019 Ophthalmology
  
  Purpose The assessment of cup-disc ratio as a surrogate parameter for the neuroretinal rim width (NRW) of the optic nerve is well established, but prone to human error and imprecision. Objective assessment of the NRW is provided by spectral domain optical coherence tomography (SD-OCT). This study is the first to systematically compare NRW measurements acquired with the Carl Zeiss Meditech Cirrus HD-OCT 5000 and the Heidelberg Engineering Spectralis SD-OCT. Methods ...
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  Mentions: Heidelberg Engineering Medical University of Vienna Carl Zeiss Meditec
13. Feature Of The Week 03/31/2019: Depth resolved label-free multimodal optical imaging platform to study morpho-molecular composition of tissue
  
  Explore Optical Coherence Tomography News Mar 31 2019
  
  ...ar and morphological information. For more information see recent Article . Courtesy Angelika Unterhuber from Medical University of Vienna . We have developed a multimodal laser scanning microscope (LSM) platform combini...
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  Mentions: Wolfgang Drexler Medical University of Vienna Angelika Unterhuber
14. Semi‐automated quantification of geographic atrophy with blue‐light autofluorescence and spectral‐domain optical coherence tomography: a comparison between the region finder and the advanced retinal pigment epithelium tool in the clinical setting
  
  Explore Wiley Online Library Mar 26 2019 Ophthalmology
  
  Purpose To compare inter‐ and intraobserver reliability and intermodality agreement on quantification of geographic atrophy, using two routinely available quantification tools, based on blue‐light fundus autofluorescence (BAF) and spectral‐domain optical coherence tomography (SD‐OCT). Methods Quantifications of atrophic lesions within the central 5 mm of 30 eyes from 30 patients (mean age: 76.1 years) were independently performed by two clinicians on BAF images using the region finder ...
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  Mentions: Heidelberg Engineering Medical University of Vienna Carl Zeiss Meditec
15. Depth resolved label-free multimodal optical imaging platform to study morpho-molecular composition of tissue
  
  Explore RSC Publishing Home Mar 23 2019
  
  Multimodal imaging platforms offer a vast array of tissue information in a single image acquisition by combining complementary imaging techniques. By merging different systems, better tissue characterization can be achieved than is possible by the constituent imaging modalities alone. The combination of optical coherence tomography (OCT) with non-linear optical imaging (NLOI) techniques such as two-photon excited fluorescence (TPEF), second harmonic generation (SHG) and coherent anti-Stokes Raman scattering (CARS) provides access ...
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  Mentions: Wolfgang Drexler Medical University of Vienna Angelika Unterhuber
16. Investigating spontaneous retinal venous pulsation using Doppler optical coherence tomography
  
  Explore Nature Publishing Group Mar 14 2019 Ophthalmology
  
  We demonstrate the advantages of optical coherence tomography (OCT) imaging for investigation of spontaneous retinal venous pulsation (SRVP). The pulsatile changes in venous vessel caliber are analyzed qualitatively and quantitatively using conventional intensity-based OCT as well as the functional extension Doppler OCT (DOCT). Single-channel and double-channel line scanning protocols of our multi-channel OCT prototype are employed to investigate venous pulsatile caliber oscillations as well as venous flow pulsatility in the ...
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  Mentions: Christoph K. Hitzenberger Michael Pircher Medical University of Vienna
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