Articles that mention University of Lübeck -Optical Coherence Tomography News

University of Lübeck

0 Comments Leave a Comment

1-15 of 95 1 2 3 4 5 6 7 »
1. Mentioned In 95 Articles
2. 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 ...
  Read Full Article
  
  Comment
  
  Mentions: Gereon Hüttmann Reginald Birngruber University of Lübeck
3. 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 ...
  Read Full Article
  
  Comment
  
  Mentions: Robert A. Huber Gereon Hüttmann University of Lübeck
4. Ultra low noise Fourier domain mode locked laser for high quality megahertz optical coherence tomography
  
  Explore OSA | OSA Publishing Aug 12 2018 Tunable Sources
  
  We investigate the origin of high frequency noise in Fourier domain mode locked (FDML) lasers and present an extremely well dispersion compensated setup which virtually eliminates intensity noise and dramatically improves coherence properties. We show optical coherence tomography (OCT) imaging at 3.2 MHz A-scan rate and demonstrate the positive impact of the described improvements on the image quality. Especially in highly scattering samples, at specular reflections and for strong ...
  Read Full Article
  
  Comment
  
  Mentions: Robert A. Huber University of Lübeck Technical University of Munich
5. Interferometric detection of 3D motion using computational subapertures in optical coherence tomography
  
  Explore OSA | OSA Publishing Jul 14 2018
  
  Doppler optical coherence tomography (OCT) quantifies axial motion with high precision, whereas lateral motion cannot be detected by a mere evaluation of phase changes. This problem was solved by the introduction of three-beam Doppler OCT, which, however, entails a high experimental effort. Here, we present the numerical analogue to this experimental approach. Phase-stable complex-valued OCT datasets, recorded with full-field swept-source OCT, are filtered in the Fourier domain to limit imaging ...
  Read Full Article
  
  Comment
  
  Mentions: Thorlabs Gereon Hüttmann University of Lübeck
6. Impact of correct anatomical slab segmentation on foveal avascular zone measurements by optical coherence tomography angiography in healthy adults
  
  Explore ScienceDirect Mar 24 2018 Ophthalmology
  
  urpose To evaluate the impact of correct anatomical slab segmentation on foveal avascular zone (FAZ) dimensions in the superficial capillary plexus (SCP) and deep capillary plexus (DCP) using optical coherence tomography angiography (OCTA). Methods Participants with healthy retinas were recruited, and 5 5 mm OCTA images were acquired using the Canon HS-100 Angio eXpert module. FAZ size was measured in automatically (AS, manufacturer-based) and manually (MS, anatomical-based) segmented OCTA slabs ...
  Read Full Article
  
  Comment
  
  Mentions: University of Lübeck
7. Novel endoscope with increased depth of field for imaging human nasal tissue by microscopic optical coherence tomography
  
  Explore OSA | OSA Publishing Jan 21 2018 Otolaryngology , Probes
  
  Intravital microscopy (IVM) offers the opportunity to visualize static and dynamic changes of tissue on a cellular level. It is a valuable tool in research and may considerably improve clinical diagnosis. In contrast to confocal and non-linear microscopy, optical coherence tomography (OCT) with microscopic resolution (mOCT) provides intrinsically cross-sectional imaging. Changing focus position is not needed, which simplifies especially endoscopic imaging. For in-vivo imaging, here we are presenting endo-microscopic OCT ...
  Read Full Article
  
  Comment
  
  Mentions: Gereon Hüttmann University of Lübeck
8. High-resolution retinal swept source optical coherence tomography with an ultra-wideband Fourier-domain mode-locked laser at MHz A-scan rates
  
  Explore OSA | OSA Publishing Dec 9 2017 Ophthalmology , Tunable Sources
  
  We present a new 1060 nm Fourier domain mode locked laser (FDML laser) with a record 143 nm sweep bandwidth at 2∙ 417 kHz = 834 kHz and 120 nm at 1.67 MHz, respectively. We show that not only the bandwidth alone, but also the shape of the spectrum is critical for the resulting axial resolution, because of the specific wavelength-dependent absorption of the vitreous. The theoretical limit of our ...
  Read Full Article
  
  Comment
  
  Mentions: Robert A. Huber University of Lübeck Tom Pfeiffer
9. Retinal pulse wave velocity measurement using spectral-domain optical coherence tomography
  
  Explore Wiley Online Library Dec 9 2017
  
  In their latest publication on retinal pulse wave velocity measurement using optical co-herence tomography (OCT), Qian Li et al. propose a method to determine the pulse wave velocity in retinal arteries and veins [1]. This should enable a non-invasive determination of biomechanical properties of the vessel network, particularly the elasticity of the vessel walls [2].
  Read Full Article
  
  Comment
  
  Mentions: Gereon Hüttmann University of Lübeck Qian Li
10. Label-Free In Vivo Imaging of Corneal Lymphatic Vessels Using Microscopic Optical Coherence Tomography
  
  Explore IOVS Journal Nov 19 2017
  
  Purpose : Corneal neovascularization, in particular lymphangiogenesis, is a limiting factor in corneal transplant survival. Novel treatment approaches focus on (selective) inhibition and regression of lymphatic vessels. Imaging clinically invisible corneal lymphatic vessels is a prerequisite for these strategies. Using a murine model, this study investigates whether corneal lymphatic vessels can be imaged using microscopic optical coherence tomography (mOCT). Methods : Corneal neovascularization was induced by intrastromal placement of 11.0 nylon ...
  Read Full Article
  
  Comment
  
  Mentions: University of Cologne Gereon Hüttmann University of Lübeck
11. Feature Of The Week 09/10/2017: Thermo-elastic Optical Coherence Tomography
  
  Explore Optical Coherence Tomography News Sep 9 2017
  
  The conventional OCT image contrast is derived from elastic scattering, and shows the internal structure of the sample. The determination of the tissue type in OCT images usually depends on the interpretation by the image reader. More accurate tissue type contrast may be achieved by new OCT-based imaging modalities, with sensitivity to other physical parameters than scattering alone. Phase-sensitive OCT can detect tissue motion on nanometer-to- micrometer length scales using ...
  Read Full Article
  
  Comment
  
  Mentions: Robert A. Huber Delft University of Technology Chinese Academy of Sciences
12. An Approach for Needle Based Optical Coherence Elastography Measurements
  
  Explore Home - Springer Sep 9 2017
  
  While navigation and interventional guidance are typically based on image data, the images do not necessarily reflect mechanical tissue properties. Optical coherence elastography (OCE) presents a modality with high sensitivity and very high spatial and temporal resolution. However, OCE has a limited field of view of only 25 mm depth. We present a side-facing needle probe to image externally induced shear waves from within soft tissue. A first method of ...
  Read Full Article
  
  Comment
  
  Mentions: Gereon Hüttmann University of Lübeck
13. Thermo-elastic optical coherence tomography
  
  Explore OSA | OSA Publishing Sep 2 2017
  
  The absorption of nanosecond laser pulses induces rapid thermo-elastic deformation in tissue. A sub-micrometer scale displacement occurs within a few microseconds after the pulse arrival. In this Letter, we investigate the laser-induced thermo-elastic deformation using a 1.5 MHz phase-sensitive optical coherence tomography (OCT) system. A displacement image can be reconstructed, which enables a new modality of phase-sensitive OCT, called thermo-elastic OCT. An analysis of the results shows that the ...
  Read Full Article
  
  Comment
  
  Mentions: Robert A. Huber Delft University of Technology Chinese Academy of Sciences
14. 'PhotonControl' uses Optical Coherence Tomography, Raman spectroscopy to test quality of bioprinted tissue | 3D Printer News & 3D Printing News
  
  Explore 3ders.org Aug 7 2017 Funding
  
  ...ther over the next two years by Groll and Dr. Gereon Hüttmann from the Institute for Biomedical Optics at the University of Lübeck. Around 240,000 euros ($283,000) has been provided for the project by Germany's Federal M...
  Read Full Article
  
  Comment
  
  Mentions: Gereon Hüttmann University of Lübeck
15. U.S. Engineers James G. Fujimoto and Eric A. Swanson, and German Physicist Robert Huber Win European Inventor Award 2017
  
  Explore YouTube Jun 15 2017
  
  Exceptional inventors from Austria, Belgium, France, Germany, Italy, Morocco, the Netherlands, Spain, and the US receive European Inventor Award 2017 at ceremony in Venice ... U.S. Engineers James G. Fujimoto and Eric A. Swanson, and German Physicist Robert Huber Win in the "Non-EPO Countries" category. For more information see http://www.prweb.com/releases/2017/06/prweb14416991.htm.
  Read Full Article
  
  Comment
  
  Mentions: Massachusetts Institute of Technology James G. Fujimoto Robert A. Huber
16. INTRAPAPILLARY PROLIFERATION IN OPTIC DISK PITS: Clinical Findings and Time-Related Changes
  
  Explore LWW Online Apr 21 2017 Ophthalmology
  
  Purpose: To investigate the structural changes of intrapapillary proliferations associated with optic disk pits (ODPs) and optic disk pit maculopathy (ODP-M) using enhanced depth-spectral domain-optical coherence tomography (SD-EDI-OCT) and megahertz optical coherence tomography (MHz-OCT). Methods: Sixteen eyes of patients with ODPs were studied. Papillary and peripapillary areas were repeatedly examined with SD-EDI-OCT over time. To evaluate swept-source OCT, some of the patients additionally received MHz-OCT-imaging. Results: MHz-OCT or SD-EDI images ...
  Read Full Article
  
  Comment
  
  Mentions: Robert A. Huber Wolfgang Wieser University of Lübeck
17. 1-15 of 95 1 2 3 4 5 6 7 »