Articles that mention Nicolaus Copernicus University -Optical Coherence Tomography News

Nicolaus Copernicus University

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1. Mentioned In 171 Articles
2. In vivo volumetric imaging by crosstalk-free full-field OCT
  
  Explore OSA | OSA Publishing May 9 2019
  
  Cellular resolution imaging of biological structures has always been a challenge due to strong scattering that limits the achievable transverse resolution or imaging penetration depth. Recently, a major advancement toward high-resolution and volumetric imaging was achieved by implementing a parallel detection (i.e., full field) into Fourier-domain optical coherence tomography. The drawback of using parallel detection is that scattered light can travel laterally and get mapped improperly at a camera ...
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  Mentions: Maciej Wojtkowski Nicolaus Copernicus University
3. Air-Puff-Induced Dynamics of Ocular Components Measured with Optical Biometry
  
  Explore IOVS Journal May 7 2019 Ophthalmology
  
  Purpose : To analyze the dynamics of all optical components of the eye and the behavior of the eyeball under air-puff conditions in vivo. To determine the impact of the intraocular pressure (IOP) on the air-puff-induced deformation of the eye. Methods : Twenty eyes of 20 healthy subjects were included in this study. The dynamics of the ocular components, such as the cornea, the crystalline lens, and the retina, was measured by ...
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  Mentions: Maciej Wojtkowski Nicolaus Copernicus University Bartlomiej J. Kaluzny
4. Spatiotemporal optical coherence (STOC) manipulation suppresses coherent cross-talk in full-field swept-source optical coherence tomography
  
  Explore OSA | OSA Publishing Apr 10 2019
  
  Full-field swept-source optical coherence tomography (FF-SS-OCT) provides high-resolution depth-resolved images of the sample by parallel Fourier-domain interferometric detection. Although FF-SS-OCT implements high-speed volumetric imaging, it suffers from the cross-talk-generated noise from spatially coherent lasers. This noise reduces the transversal image resolution, which in turn, limits the wide adaptation of FF-SS-OCT for practical and clinical applications. Here, we introduce the novel spatiotemporal optical coherence (STOC) manipulation. In STOC the time-varying inhomogeneous ...
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  Mentions: Maciej Wojtkowski Nicolaus Copernicus University
5. Computationally effective 2D and 3D fast phase unwrapping algorithms and their applications to Doppler optical coherence tomography
  
  Explore OSA | OSA Publishing Feb 20 2019
  
  We propose a simplification for a robust and easy to implement fast phase unwrapping (FPU) algorithm that is used to solve the phase wrapping problem encountered in various fields of optical imaging and metrology. We show that the number of necessary computations using the algorithm can be reduced compared to its original version. FPU can be easily extended from two to three spatial dimensions. We demonstrate the applicability of the ...
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  Mentions: Nicolaus Copernicus University Maciej Szkulmowski Iwona Gorczynska
6. A Micro-Tomographic Insight into the Coating Systems of Historical Bowed String Instruments
  
  Explore MDPI Open Access Journals Platform Jan 29 2019 Art , NDE/NDT , Other Non-Medical
  
  Musical instruments are tools for playing music, but for some of themmade by the most important historical violin makersthe myths hide the physical artwork. Ancient violin-making Masters developed peculiar construction methods and defined aesthetic canons that are still recognizable in their musical instruments. Recently, the focus of scientific investigations has been set on the characterization of materials and methods used by the ancient violin makers by means of several scientific ...
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  Mentions: Nicolaus Copernicus University Piotr Targowski
7. Optical Coherence Tomography (OCT) for Examination of Artworks (Book Chapter)
  
  Explore Springer US Jan 5 2019 Art , Textbooks
  
  his book details the application of advanced characterisation techniques and diagnostic tools to heritage science, including the evaluation of heritage assets condition, their preservation and restoration. It examines the use of electrochemical techniques in conservation science, with a particular focus on how to solve problems in taking on-site measurements. Specifically, it introduces readers to a new gel polymer (GPE) electrochemical cell developed by the authors for the characterisation of metallic ...
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  Mentions: Nicolaus Copernicus University Piotr Targowski Marcin Sylwestrzak
8. Optical Coherence Tomography (OCT) for Examination of Artworks (Book Chapter)
  
  Explore Home - Springer Jan 3 2019 Textbooks
  
  Optical coherence tomography is a fast, non-invasive technique of structural analysis utilising near-infrared radiation. Examples of using OCT, for obtaining cross-sectional images of objects of craftsmanship and an easel painting have been shown. Issues regarding the technique of execution and destruction phenomena were resolved non-invasively. In some cases, the secondary alterations can be identified and localised within the objects structure which helps in authentication of the artwork.
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  Mentions: Nicolaus Copernicus University Piotr Targowski Marcin Sylwestrzak
9. Megahertz-rate optical coherence tomography angiography improves the contrast of the choriocapillaris and choroid in human retinal imaging
  
  Explore OSA | OSA Publishing Dec 5 2018 Ophthalmology
  
  Angiographic imaging of the human eye with optical coherence tomography (OCT) is becoming an increasingly important tool in the scientific investigation and clinical management of several blinding diseases, including age-related macular degeneration and diabetic retinopathy. We have observed that OCT angiography (OCTA) of the human choriocapillaris and choroid with a 1.64 MHz A-scan rate swept-source laser yields higher contrast images as compared to a slower rate system operating at ...
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  Mentions: John S. Werner Nicolaus Copernicus University UC Davis
10. Intraframe motion correction for raster-scanned adaptive optics images using strip-based cross-correlation lag biases
  
  Explore Journals | PLOS Oct 25 2018 Ophthalmology
  
  In retinal raster imaging modalities, fixational eye movements manifest as image warp, where the relative positions of the beam and retina change during the acquisition of single frames. To remove warp artifacts, strip-based registration methodsin which fast-axis strips from target images are registered to a reference framehave been applied in adaptive optics (AO) scanning light ophthalmoscopy (SLO) and optical coherence tomography (OCT). This approach has enabled object tracking and frame ...
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  Mentions: Thorlabs Dalsa Superlum
11. Non invasive optical cellular imaging in humans
  
  Explore Photonics Society of Poland Oct 6 2018
  
  One of the most appealing and still unsolved problems in biological and medical imaging is the possibility of noninvasive visualization of tissue in vivo with an accuracy of microscopic examination. A major difficulty to solve in biomedical imaging is a degradation of image quality caused by the presence of optical inhomogeneity of tissue. Is there any chance to develop a microscopic method that allows non-invasive observation of cells in living ...
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  Mentions: Maciej Wojtkowski Nicolaus Copernicus University
12. Enhancing microvasculature maps for Optical Coherence Tomography - Angiography (OCT-A)
  
  Explore Photonics Society of Poland Oct 6 2018
  
  OCT-A is becoming more popular in recent years and there is a high demand to improve the quality of angiograms as well as to extract quantitative information. We applied various processing methods for microvasculature enhancement like Hessian-Frangi to a data set obtained with Bessel and Gaussian OCT systems. We used angiogenesis, fractal and multifractal analysis to extract more quantitative information. We applied the processing methods for healthy, stroke, tumor progression ...
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  Mentions: Maciej Wojtkowski Nicolaus Copernicus University
13. Professor Andrzej Kowalczyk Celebration Gala
  
  Explore Optical Coherence Tomography News Sep 24 2018
  
  ...phthalmic Technologies, and a number of private sponsors. On September 15th 2018, the Institute of Physics at Nicolaus Copernicus University in Toruń, Poland, held a special event to celebrate the academic achievements o...
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  Mentions: National Institutes of Health Adrian G. Podoleanu University of Kent
14. Assessment of the influence of viscoelasticity of cornea in animal ex vivo model using air‐puff optical coherence tomography and corneal hysteresis
  
  Explore Wiley Online Library Sep 21 2018 Ophthalmology
  
  Application of the air‐puff swept source OCT (SS‐OCT) instrument to determine the influence of viscoelasticity on the relation between overall the air‐puff force and corneal apex displacement of porcine corneas ex vivo is demonstrated. Simultaneous recording of time‐evolution of the tissue displacement and air pulse stimulus allows obtaining valuable information related in part to the mechanical properties of the cornea. A novel approach based on quantitative ...
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  Mentions: Maciej Wojtkowski Nicolaus Copernicus University Bartlomiej J. Kaluzny
15. Post-doctoral Research Fellow Position and 2 PhD Studentships in Ophthalmic Imaging at the Nicolaus Copernicus University, Torun, Poland
  
  Explore Optical Coherence Tomography News Aug 14 2018 Jobs & Studentships
  
  ...e project and application details: igrulkowski@fizyka.umk.pl The Bio-Optics & Optical Engineering Lab at the Nicolaus Copernicus University invites applications for the positions in a project entitled Lenticular and vit...
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  Mentions: Nicolaus Copernicus University Ireneusz Grulkowski
16. Volumetric macro- and micro-scale assessment of crystalline lens opacities in cataract patients using long-depth-range swept source optical coherence tomography
  
  Explore OSA | OSA Publishing Jul 25 2018 Ophthalmology
  
  We demonstrate an optimized optical platform for the three-dimensional (3-D) visualization of crystalline lens opacities in vivo in the eyes of patients with different types and grades of cataracts. We developed a prototype long-depth-range swept source optical coherence tomography (SS-OCT) instrument operating at the speed of 50 kA-scans/second and at the central wavelength of 1 m to perform high-resolution imaging of the whole anterior segment of the eye. Volumetric ...
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  Mentions: Nicolaus Copernicus University Ireneusz Grulkowski
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