Articles that mention Nicolaus Copernicus University -Optical Coherence Tomography News

Nicolaus Copernicus University

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1. Mentioned In 168 Articles
2. 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
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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
11. 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
12. 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
13. 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
14. Realistic simulation and experiment reveals the importance of scatterer microstructure in optical coherence tomography image formation
  
  Explore OSA | OSA Publishing Jun 15 2018
  
  Realistic simulation of image formation in optical coherence tomography, based on Maxwells equations, has recently been demonstrated for sample volumes of practical significance. Yet, there remains a limitation whereby reducing the size of cells used to construct a computational grid, thus allowing for a more realistic representation of scatterer microstructure, necessarily reduces the overall sample size that can be modelled. This is a significant problem since, as is well known ...
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  Mentions: University College London David D. Sampson Nicolaus Copernicus University
15. Retina Tomography and Optical Coherence Tomography in Eye Diagnostic System
  
  Explore Home - Springer May 11 2018 Ophthalmology
  
  Eye diagnostic, two-step method based on retina color image and Optical Coherence Tomography is presented in this paper. A new robust algorithm, by which various eye diseases can be diagnosed, was implemented as an essential part of the work. The approach comprises two steps. The first one deals with the analysis of retina color image. In this stage, an algorithm was implemented to especially search hard exudates. If the algorithm ...
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  Mentions: Nicolaus Copernicus University Maciej Szkulmowski
16. Using Optical Coherence Tomography to Reveal the Hidden History of The Landsdowne Virgin of the Yarnwinder by Leonardo da Vinci and Studio
  
  Explore Wiley Online Library Mar 7 2018 Art
  
  Optical coherence tomography (OCT) was used for non‐invasive examination of a well‐known, yet complex, painting from the studio of Leonardo da Vinci in combination with routine imaging in various bands of electromagnetic radiation. In contrast with these techniques, OCT provides depth‐resolved information. Three post‐processing modalities were explored: cross‐sectional views, maps of scattering from given depths, and their 3D models. Some hidden alterations of the painting ...
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  Mentions: Nicolaus Copernicus University Piotr Targowski Marcin Sylwestrzak
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