Articles that mention Valery V. Tuchin -Optical Coherence Tomography News

Valery V. Tuchin

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1. Mentioned In 69 Articles
2. Capability of physically reasonable OCT-based differentiation between intact brain tissues, human brain gliomas of different WHO grades, and glioma model 101.8 from rats
  
  Explore OSA | OSA Publishing Dec 8 2020 Neurology , Oncology
  
  Optical coherence tomography (OCT) of the ex vivo rat and human brain tissue samples is performed. The set of samples comprises intact white and gray matter, as well as human brain gliomas of the World Health Organization (WHO) Grades I-IV and glioma model 101.8 from rats. Analysis of OCT signals is aimed at comparing the physically reasonable properties of tissues, and determining the attenuation coefficient, parameter related to effective ...
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  Mentions: Institute of Applied Physics Saratov State University Valery V. Tuchin
3. Magnetic Resonance Contrast Agents in Optical Clearing: Prospects for Multimodal Tissue Imaging
  
  Explore Wiley Online Library Jul 22 2020 Dermatology
  
  Skin optical clearing effect ex vivo and in vivo was achieved by topical application of low molecular weight paramagnetic magnetic resonance contrast agents. This novel feature has not been explored before. By using collimated transmittance the diffusion coefficients of three clinically used magnetic resonance contrast agents, i.e. Gadovist, Magnevist and Dotarem as well as X‐ray contrast agent Visipaque in mouse skin were determined ex vivo as (4.290 ...
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  Mentions: Institute of Applied Physics Saratov State University Valery V. Tuchin
4. Integrated effects of fractional laser microablation and sonophoresis on skin immersion optical clearing in vivo
  
  Explore Wiley Online Library May 3 2020 Dermatology
  
  $Integrated effects of fractional laser microablation and sonophoresis on skin immersion optical clearing in vivo$
  This study is aimed to find an approach for effective skin optical clearing in vivo using polyethylene glycol 300 (PEG‐300) as an optical clearing agent in combination with physical enhancers: fractional laser microablation (FLMA), and/or low‐frequency sonophoresis. In this study albino outbred rats were used. Light attenuation coefficient and optical clearing potential of these approaches were evaluated in upper (from ~70 to ~200m) and middle (from ~200 ...
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  Mentions: Valery V. Tuchin
5. Full-Field Optical Coherence Tomography Based on a MII-4 Microprofilometer Using Microlenses with Air Immersion
  
  Explore Home - Springer Sep 24 2019
  
  A modernized Linnik microprofilometer (MII-4) allowing the performing of tomographic investigation of transparent and relatively turbid media by the methods of low-coherence interferometry has been presented. The design of the reference channel of the standard MII-4 has been revised. A dynamic adjustment of the reference arm length has been added to compensate for the effect of divergence between focal and coherent volumes, as well as spherical aberration that occurs when ...
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  Mentions: Institute of Applied Physics Saratov State University Valery V. Tuchin
6. Recent progress in optical probing and manipulation of tissue: introduction
  
  Explore OSA | OSA Publishing Sep 17 2019
  
  ...erview of current research in tissue optics, much of it inspired and informed by the pioneering work of Prof. Valery Tuchin. The issue contains three invited manuscripts and several mini-reviews that we hope will benefit...
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  Mentions: Kirill V. Larin University of Houston David D. Sampson
7. An Experimentally Trained Noise Filtration Method of Optical Coherence Tomography Signals
  
  Explore Home - Springer Jun 28 2019
  
  A method for wavelet filtration procedure training for optical coherence tomography (OCT) images using the experimental measurements of test objects that were constructed by means of water solutions of monodisperse nanoparticles and several microscopic inclusions has been described in the present paper. The choice of test-object parameters (concentration of water solution, size of nanoparticles, and shape, dimensions, and mutual position of inclusions) has allowed the modeling of various working conditions ...
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  Mentions: Institute of Applied Physics Saratov State University Valery V. Tuchin
8. Optical monitoring of adipose tissue destruction under encapsulated lipase action
  
  Explore Wiley Online Library Nov 9 2018
  
  Enzymatic destruction of adipose tissue has been achieved by encapsulation of lipase into the polymeric microcapsules. Adipose tissue destruction was delayed while lipase is encapsulated comparing with the direct lipase action as demonstrated by optical microscopy and optical coherence tomography in in vitro studies. Raman spectroscopy confirms that triglycerides in fat tissue were cleaved into free fatty acids, glycerol, and possible di‐ and monoglyceride residues. The results underpin the concept ...
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  Mentions: Valery V. Tuchin
9. A robust model of an OCT signal in a spectral domain
  
  Explore IOPscience Jun 23 2018
  
  Optical coherence tomography (OCT) relies on ballistic back scattered photons to construct depth resolved optical slices of a specimen. However, the theory of OCT is generally math heavy and unintuitive. In this paper, we propose an approach, and show as many aspects of the OCT signal formation that can be described by using simple math and intuitive physics. The model allowing for simulating a semi-ideal OCT signal from an object ...
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  Mentions: Saratov State University Valery V. Tuchin
10. Nanoparticle-enabled experimentally trained wavelet-domain denoising method for optical coherence tomography
  
  Explore SPIE Digital Library Apr 26 2018
  
  We present the nanoparticle-enabled experimentally trained wavelet-domain denoising method for optical coherence tomography (OCT). It employs an experimental training algorithm based on imaging of a test-object, made of the colloidal suspension of the monodisperse nanoparticles and contains the microscale inclusions. The geometry and the scattering properties of the test-object are known a priori allowing us to set the criteria for the training algorithm. Using a wide set of the wavelet ...
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  Mentions: Valery V. Tuchin
11. Photodynamic opening of the blood-brain barrier and pathways of brain clearing
  
  Explore Wiley Online Library Jan 30 2018 Neurology
  
  A new application of the photodynamic treatment (PDT) is presented for the opening of blood-brain barrier (BBB) and the brain clearing activation that is associated with it, including the use of gold nanoparticles as emerging photosensitizer carriers in PDT. The obtained results clearly demonstrate two pathways for the brain clearing: 1) using PDT-opening of BBB and intravenous injection of FITC-dextran we showed a clearance of this tracer via the meningeal ...
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  Mentions: Saratov State University Valery V. Tuchin
12. Monitoring of temperature-mediated phase transitions of adipose tissue by combined optical coherence tomography and Abbe refractometry
  
  Explore SPIE Digital Library Jan 6 2018
  
  $Monitoring of temperature-mediated phase transitions of adipose tissue by combined optical coherence tomography and Abbe refractometry$
  Observation of temperature-mediated phase transitions between lipid components of the adipose tissues has been performed by combined use of the Abbe refractometry and optical coherence tomography. The phase transitions of the lipid components were clearly observed in the range of temperatures from 24C to 60C, and assessed by quantitatively monitoring the changes of the refractive index of 1- to 2-mm-thick porcine fat tissue slices. The developed approach has a great ...
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  Mentions: Saratov State University Valery V. Tuchin Igor V. Meglinski
13. Application of optical coherence tomography for in vivo monitoring of the meningeal lymphatic vessels during opening of blood–brain barrier: mechanisms of brain clearing
  
  Explore SPIE Digital Library Dec 26 2017 Neurology
  
  The meningeal lymphatic vessels were discovered 2 years ago as the drainage system involved in the mechanisms underlying the clearance of waste products from the brain. The bloodbrain barrier (BBB) is a gatekeeper that strongly controls the movement of different molecules from the blood into the brain. We know the scenarios during the opening of the BBB, but there is extremely limited information on how the brain clears the substances ...
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  Mentions: Saratov State University Valery V. Tuchin
14. Collaborative effects of wavefront shaping and optical clearing agent in optical coherence tomography
  
  Explore arxiv.org Oct 13 2016
  
  Developing a deep-tissue imaging tool with good optical resolution is one of the important goals of biophotonics because medical diagnosis usually requires imaging of fine details of whole tissue structures. Optical coherence tomography (OCT) is an extensively developed imaging tool for biological tissues. Based on low-coherence interferometry, OCT provides micrometer scale resolution and enables non-invasive high-speed imaging1 . OCT is widely used in ophthalmology because it can fully access retina, choroid ...
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  Mentions: Institute of Applied Physics Saratov State University Valery V. Tuchin
15. Valery Tuchin Honored with Joseph W. Goodman Award for Book on Light Scattering Applications in Medical Diagnostics
  
  Explore prweb.com Apr 16 2016 Funding
  
  ...and complete monograph in the world covering the urgent problems of tissue optics, spectroscopy, and imaging. Valery Tuchin of Saratov State University (SSU) is the recipient of the 2016 Joseph W. Goodman Book Writing Aw...
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  Mentions: Institute of Applied Physics Saratov State University Valery V. Tuchin
16. Optical clearing of articular cartilage: a comparison of clearing agents
  
  Explore Conference Proceedings Jul 16 2015
  
  Optical clearing technique was applied to the problem of OCT imaging of articular cartilage and subchondral bone. We show that optical clearing significantly enhances visualization of articular cartilage and cartilage-bone interface. The effect of different clearing agents was analyzed. For the clearing, iohexol solution and propylene glycol (PG) were used. Clearing was performed in vitro at room temperature by immersion method. Cylindrical osteochondral samples (d=4.8mm) were drilled from ...
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  Mentions: Matti Kinnunen University of Oulu Valery V. Tuchin
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