1. Moscow State University

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    1. Mentioned In 27 Articles

    2. Complementary Study of Collagen State in Bladder Diseases Using Cross-Polarization Optical Coherence Tomography, Nonlinear and Atomic Force Microscopy

      Complementary Study of Collagen State in Bladder Diseases Using Cross-Polarization Optical Coherence Tomography, Nonlinear and Atomic Force Microscopy
      The aim of the study is to demonstrate the potential of cross-polarization optical coherence tomography (CP OCT) as a minimally invasive real-time technique for detection of bladder cancer against a background of severe inflammation. Materials and Methods. For the verification of CP OCT diagnostic data related to the condition of collagen comparison with high-resolution microscopy inspection was performed and correlation of the results was calculated. The CP OCT study was ...
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    3. Quantitative evaluation of atherosclerotic plaques using cross-polarization optical coherence tomography, nonlinear, and atomic force microscopy

      Quantitative evaluation of atherosclerotic plaques using cross-polarization optical coherence tomography, nonlinear, and atomic force microscopy
      A combination of approaches to the image analysis in cross-polarization optical coherence tomography (CP OCT) and high-resolution imaging by nonlinear microscopy and atomic force microscopy (AFM) at the different stages of atherosclerotic plaque development is studied. This combination allowed us to qualitatively and quantitatively assess the disorganization of collagen in the atherosclerotic arterial tissue (reduction and increase of CP backscatter), at the fiber (change of the geometric distribution of fibers ...
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    4. Air-coupled acoustic radiation force for non-contact generation of broadband mechanical waves in soft media

      Air-coupled acoustic radiation force for non-contact generation of broadband mechanical waves in soft media
      A non-contact method for efficient, non-invasive excitation of mechanical waves in soft media is proposed, in which we focus an ultrasound (US) signal through air onto the surface of a medium under study. The US wave reflected from the air/medium interface provides radiation force to the medium surface that launches a transient mechanical wave in the transverse (lateral) direction. The type of mechanical wave is determined by boundary conditions ...
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    5. Laser-ablated silicon nanoparticles: optical properties and perspectives in optical coherencetomography

      Laser-ablated silicon nanoparticles: optical properties and perspectives in optical coherencetomography
      Due to their biocompatibility silicon nanoparticles have high potential in biomedical applications, especially in optical diagnostics. In this paper we analyze properties of the silicon nanoparticles formed via laser ablation in water and study the possibility of their application as contrasting agents in optical coherence tomography (OCT). The nanoparticles suspension was produced by picosecond laser irradiation of monocrystalline silicon wafers in water. According to transmission electron microcopy analysis the silicon ...
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    6. Visualization of magnetic microcapsules in liquid by optical coherent tomography and control of their arrangement via external magnetic field

      Visualization of magnetic microcapsules in liquid by optical coherent tomography and control of their arrangement via external magnetic field
      Optical coherence tomography (OCT) is a new, non-invasive, noncontact in vivo imaging technology. We demonstrated that the OCT can be used as a sufficient technique for nanocomposite microcapsule visualization in a liquid medium. As a model system we choose a water/glycerol mixture with viscosity in a variable range from 1.01 to 1.41103 mPa s, including viscosity of a blood plasma. We have found that tomography spatial resolution ...
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    7. Glucose sensing in flowing blood and Intralipid by laser pulse time-of-flight and optical coherence tomography techniques

      Glucose sensing in flowing blood and Intralipid by laser pulse time-of-flight and optical coherence tomography techniques
      In this paper, we compare the sensitivities of the two optical modalities, laser pulse time-of-flight (TOF) and optical coherence tomography (OCT), in regard to glucose sensing within the range of 0-1000 mg/dl in flowing blood and tissue-mimicking liquid (Intralipid). We show that TOF technique is about twice more sensitive than OCT, as well for blood as for Intralipid measurements. In case of TOF technique, glucose sensitivity in Intralipid is ...
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    8. Octave Spanning Tunable Frequency Comb from a Microresonator

      Octave Spanning Tunable Frequency Comb from a Microresonator
      We report the generation of an octave-spanning optical frequency comb in a continuous wave laser pumped microresonator. The generated comb spectrum covers the wavelength range from 990 to 2170 nm without relying on additional external broadening. Continuous tunability of the generated frequency comb over more than an entire free spectral range is demonstrated. Moreover, the linewidth of individual optical comb components and its relation to the pump laser phase noise ...
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    9. Multilayer tissue phantoms with embedded capillary system for OCT and DOCT imaging

      Multilayer tissue phantoms with embedded capillary system for OCT and DOCT imaging
      We report about manufacturing of fully functional capillary network embedded into the multilayer tissue phantom. Polyvinyl chloride-plastisol was used as a host transparent medium. Scattering was introduced by adding the TiO2submicron particles. OCT technique was used to characterize the manufactured phantoms and to monitor the vessels filling with different liquids.
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    10. Experimental study of the multiple scattering effect on the flow velocity profiles measured in intralipid phantoms by DOCT

      Experimental study of the multiple scattering effect on the flow velocity profiles measured in intralipid phantoms by DOCT
      Abstract  Time domain Doppler Optical Coherence Tomography (DOCT) technique was applied to measure flow velocity profiles in highly scattering media. We analyzed the distortions of the measured velocity profiles of the 1% Intralipid solution flow embedded into the scattering medium at different embedding depths. For this purpose a tissue phantom consisting of a plain glass capillary (inner diameter 0.3 mm) embedded into a slab of Intralipid solution mimicking human ...
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    11. Laser-induced modification of the patellar ligament tissue: comparative study of structural and optical changes

      Laser-induced modification of the patellar ligament tissue: comparative study of structural and optical changes
      The effects of non-ablative infrared (IR) laser treatment of collagenous tissue have been commonly interpreted in terms of collagen denaturation spread over the laser-heated tissue area. In this work, the existing model is refined to account for the recently reported laser-treated tissue heterogeneity and complex collagen degradation pattern using comprehensive optical imaging and calorimetry toolkits. Patella ligament (PL) provided a simple model of type I collagen tissue containing its full ...
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    12. Comparative studies of infrared laser and radio-frequency action on in vitro biotissues by the method of polarization sensitive optical coherence tomography

      Comparative studies of infrared laser and radio-frequency action on in vitro biotissues by the method of polarization sensitive optical coherence tomography
      ...ences, Nizhny Novgorod, Russia (2) Nizhny Novgorod State Medical Academy, Nizhny Novgorod, Russia (3) M. V. Lomonosov Moscow State University, Moscow, Russia Received: 3 July 2009 Accepted: 29 January 2010 Published ...
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    13. Effect of light scattering superficial layer on the accuracy of flow velocity profiles measurements by Doppler optical coherence tomography

      Effect of light scattering superficial layer on the accuracy of flow velocity profiles measurements by Doppler optical coherence tomography
      Doppler Optical Coherence Tomography (DOCT) is a modern technique used for accurate measurements of blood flow in the superficial layers of human skin, retina or other tissues and their phantoms. In this work, we considered the effect of both static and dynamic superficial layer of the scattering medium on the measured velocity of a flow located beneath this layer. In the case of static layer a tissue phantom consisting of ...
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    14. Doppler OCT imaging of cytoplasm shuttle flow in Physarum polycephalum

      The Doppler optical coherence tomography technique was applied to image the oscillatory dynamics of protoplasm in the strands of the plasmodium of slime mould Physarum polycephalum. Radial contractions of the gel-like walls of the strands and the velocity distributions in the sol-like endoplasm streaming along the plasmodial strands are imaged. The motility inhibitor effect of carbon dioxide on the cytoplasm shuttle flow and strand-wall contraction is shown. The optical attenuation ...
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    15. 1-15 of 27 1 2 »
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  2. About Moscow State University

    Moscow State University

    Lomonosov Moscow State University was established in 1755. More than 40 000 undergraduates and about 7 000 postgraduates study at the university, and over 5 000 specialists do the refresher course here. More than 4 000 professors and lecturers, and about 5 000 researchers work for the faculties and research institutes. The University employs over 15 000 of ancillary staff. Every year Moscow University enrolls about 2 000 international students and postgraduates from all over the world. Moscow University has at its disposal more than 600 buildings and facilities including the sky-scraper on Lenin Hills, occupying over 1 million square metres. The University campus in Moscow covers 205.7 hectares.