Articles that mention University of Lübeck -Optical Coherence Tomography News

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1. Mentioned In 108 Articles
2. Reduction of periodic noise in Fourier domain optical coherence tomography images by frequency domain filtering
  
  Explore Home Sep 1 2019
  
  In Fourier domain optical coherence tomography (FDOCT) coherence noise is caused by interference of light waves back-reflected or scattered from different spots within a measuring depth or from optical components within the OCT system such as a bended optical fibre. This coherence noise appears as periodic stripe patterns along the axial direction in resulting images. Background subtraction and physical segmentation are used to degrade the periodic coherence noise in previous ...
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  Mentions: University of Freiburg University of Lübeck
3. Computational adaptive optics for optical coherence tomography using multiple randomized subaperture correlations
  
  Explore OSA | OSA Publishing Aug 1 2019
  
  Computational adaptive optics (CAO) is emerging as a viable alternative to hardware-based adaptive opticsin particular when applied to optical coherence tomography of the retina. For this technique, algorithms are required that detect wavefront errors precisely and quickly. Here we propose an extension of the frequently used subaperture image correlation. By applying this algorithm iteratively and, more importantly, comparing each subaperture not to the central subaperture but to several randomly selected ...
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  Mentions: Gereon Hüttmann University of Lübeck Hendrik Spahr
4. Motorized capsule for shadow-free OCT imaging and synchronous beam control
  
  Explore OSA | OSA Publishing Jul 19 2019 Gastroenterology , Probes
  
  We demonstrate a tethered motorized capsule for unobstructed optical coherence tomography (OCT) imaging of the esophagus. By using a distal reflector design, we avoided the common shadow artifact induced by the motor wires. A synchronous driving technique features three types of beam-scanning modes of the capsule, i.e., circumferential beam scanning, localized beam scanning, and accurate beam positioning. We characterized these three modes and carried out ex vivo imaging experiments ...
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  Mentions: Brett E. Bouma Massachusetts General Hospital Harvard University
5. Segmentation of mouse skin layers in optical coherence tomography image data using deep convolutional neural networks
  
  Explore OSA | OSA Publishing Jun 26 2019 Dermatology
  
  Optical coherence tomography (OCT) enables the non-invasive acquisition of high-resolution three-dimensional cross-sectional images at micrometer scale and is mainly used in the field of ophthalmology for diagnosis as well as monitoring of eye diseases. Also in other areas, such as dermatology, OCT is already well established. Due to its non-invasive nature, OCT is also employed for research studies involving animal models. Manual evaluation of OCT images of animal models is ...
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  Mentions: Massachusetts General Hospital Gereon Hüttmann University of Lübeck
6. Evaluating diurnal changes in choroidal sublayer perfusion using optical coherence tomography angiography
  
  Explore Wiley Online Library May 23 2019 Ophthalmology
  
  Purpose To investigate diurnal changes of choroidal sublayer perfusion in normal eyes and to identify influencing factors using optical coherence tomography angiography (OCTA). Methods A prospective study was conducted on healthy volunteers, each of whom underwent repeated measurements of subfoveal choroidal thickness (SFCT) via enhanced depth imaging (EDI) optical coherence tomography (OCT) as well as perfusion of choroidal vascular sublayers using OCTA at 7 a.m., 12 p.m., 4 ...
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  Mentions: University of Lübeck
7. Retinal perfusion 6 months after trabeculectomy as measured by optical coherence tomography angiography
  
  Explore Home - Springer May 16 2019 Ophthalmology
  
  Purpose To investigate potential changes of vessel density (VD) at the optic nerve head (ONH) and the macula 6 months after trabeculectomy (TE). Methods In a prospective monocentric study, 19 eyes with open-angle glaucoma were treated with TE+MMC (mitomycin C). At four different time points multiple morphological papillary parameters were measured by OCT, and the ONH VD in the radial peripapillary capillary layer and the superficial and deep plexuses ...
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  Mentions: Optovue University of Lübeck
8. Optimization-based vessel segmentation pipeline for robust quantification of capillary networks in skin with optical coherence tomography angiography
  
  Explore SPIE Digital Library May 5 2019 Dermatology
  
  Optical coherence tomography angiography (OCTA) provides in-vivo images of microvascular perfusion in high resolution. For its application to basic and clinical research, an automatic and robust quantification of the capillary architecture is mandatory. Only this makes it possible to reliably analyze large amounts of image data, to establish biomarkers, and to monitor disease developments. However, due to its optical properties, OCTA images of skin often suffer from a poor signal-to-noise ...
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  Mentions: Massachusetts General Hospital Harvard University Gereon Hüttmann
9. Permanent Professor Position available at University of Lubeck
  
  Explore Optical Coherence Tomography News May 2 2019 Jobs & Studentships
  
  The Institute of Biomedical Optics at the Department of Computer Science/Engineering and Department of Natural Sciences (STEM) at the Universität zu Lübeck invites applications for a permanent University Professorship (W2) in Biomedical Optics and Photonics commencing as soon as possible. Conditions of the appointment are in accordance with the Higher Education Act (Hochschulgesetz) of Schleswig Holstein. Details will be explained on request. The successful candidate will represent ...
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  Mentions: Thorlabs Heidelberg Engineering University of Lübeck
10. MUcociliary Clearance IN Stroke
  
  Explore Home - ClinicalTrials.gov Mar 21 2019 Pulmonology , Clinical Trials
  
  Survival and functional outcome of stroke is strongly depending on the occurence of pneumonia (stroke-associated pneumonia, SAP). Early diagnose and treatment of SAP is paramount in the treatment of stroke patients. While dysphagia strongly contributes to its pathogenesis, recent years have also shown a strong risk-modulation by CNS injury induced immunosuppression, making stroke patients more susceptible to SAP. Additionally, murine models of stroke showed changes in mucociliary clearance as possible ...
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  Mentions: University of Lübeck
11. Artifacts in speckle tracking and multi-aperture Doppler OCT imaging of lateral motion
  
  Explore OSA | OSA Publishing Mar 16 2019
  
  In optical coherence tomography (OCT), lateral motion is determined either by speckle tracking or by multi-aperture Doppler OCT. Here we show that both methods may provide incorrect results because, outside the focal plane, non-uniform axial motion is misinterpreted as lateral motion. First, we demonstrate the existence of this artifact by means of a simulation for speckle tracking. Then the physical origin of the artifact and its mathematical relation to defocus ...
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  Mentions: Gereon Hüttmann University of Lübeck Hendrik Spahr
12. OptoRes presents world-record 3 MHz swept laser at SPIE BiOS / Photonics West in San Francisco
  
  Explore Optical Coherence Tomography News Jan 31 2019 Other Business News , Tunable Sources
  
  ...ength for high- quality OCT images. According to Prof. Robert Huber, Optores co-founder and professor at the Universität zu Lübeck, Optores’ core technology Fourier-domain mode-locking (FDML) plays a crucial role: “Opto...
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  Mentions: James G. Fujimoto Robert A. Huber University of Lübeck
13. Postdoc position, Intravital nanoscopy for investigating the blood-brain barrier (m/f/d)
  
  Explore Nature Publishing Group Jan 28 2019 Jobs & Studentships
  
  ...ed in the Small Animallmaging Lübeck (SAIL) facility in the Center for Brain, Behavior and Metabolism (CBBM), University of Lübeck. lt is based on a broad background in biomedical optics, intravital microscopy and cerebr...
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  Mentions: University of Lübeck
14. Optical coherence tomography provides an optical biopsy of burn wounds in children—a pilot study
  
  Explore SPIE Digital Library Oct 24 2018 Dermatology
  
  Thermic injuries are among the most severe injuries in childhood. Burn depth is the most relevant prognostic factor, and still its assessment is both difficult and controversial. This diagnostic uncertainty results in repeated wound assessments over a 10-day period and carries a relevant risk for over- and undertreatment. Precise wound assessment would thus be a significant step toward improved care. Optical coherence tomography (OCT) is a noninvasive laser-based technique with ...
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  Mentions: University of Lübeck Julia Welzel
15. Simple approach for aberration-corrected OCT imaging of the human retina
  
  Explore OSA | OSA Publishing Sep 7 2018 Ophthalmology
  
  Aberration-corrected imaging of human photoreceptor cells, whether hardware or software based, presently requires a complex and expensive setup. Here we use a simple and inexpensive off-axis full-field time-domain optical coherence tomography (OCT) approach to acquire volumetric data of an in vivo human retina. Full volumetric data are recorded in 1.3 s. After computationally correcting for aberrations, single photoreceptor cells were visualized. In addition, the numerical correction of ametropia is ...
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  Mentions: Gereon Hüttmann Reginald Birngruber University of Lübeck
16. High-speed fiber scanning endoscope for volumetric multi-megahertz optical coherence tomography
  
  Explore OSA | OSA Publishing Sep 6 2018 Probes
  
  We present a forward-viewing fiber scanning endoscope (FSE) for high-speed volumetric optical coherence tomography (OCT). The reduction in size of the probe was achieved by substituting the focusing optics by an all-fiber-based imaging system which consists of a combination of scanning single-mode fibers, a glass spacer, made from a step-index multi-mode fiber, and a gradient-index fiber. A lateral resolution of 11 m was achieved at a working distance of 1 ...
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  Mentions: Robert A. Huber Gereon Hüttmann University of Lübeck
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