Dr. Pavel A. Shilyagin Profile

Dr. Pavel A. Shilyagin

at Institute of Applied Physics of the RAS

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Author

Publications (21)

Proceedings Article | 5 March 2021 Presentation + Paper

A comparative in-vivo study of the female urethra with cross-polarization optical coherence tomography using two types of endoscopic probes

Elena Kiseleva, Pavel Shilyagin, Vasily Vlasov, Anton Kuyarov, Muhammat Molvi, Grigory Gelikonov, Olga Streltsova

Proceedings Volume 11619, 116190C (2021) https://doi.org/10.1117/12.2578224

KEYWORDS: Optical coherence tomography, Endoscopy, In vivo imaging, Tissues, Visualization, Bladder, Pathology, Pathogens, Image resolution, Image quality

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Proceedings Article | 21 February 2020 Paper

Numerical method for axial motion correction in optical coherence tomography

G. Gelikonov, P. Shilyagin, S. Yu. Ksenofontov, D. A. Terpelov, V. Gelikonov, A. Moiseev

Proceedings Volume 11228, 112282V (2020) https://doi.org/10.1117/12.2545966

KEYWORDS: Optical coherence tomography, Distortion, Retina, Imaging systems, 3D image processing, Numerical analysis, Eye, Signal to noise ratio, Image restoration, Retinal scanning

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Proceedings Article | 22 July 2019 Paper

Cross-polarization OCT needle probe for combined blood vessels detection and tissue differentiation during stereotactic biopsy of brain tumors

Elena Kiseleva, Pavel Shilyagin, Vladimir Romashov, Yulia Korzhimanova, Marina Sirotkina, Konstantin Yashin, Elena Zagaynova, Grigory Gelikonov, Natalia Gladkova

Proceedings Volume 11079, 110791D (2019) https://doi.org/10.1117/12.2526770

KEYWORDS: Optical coherence tomography, Biopsy, Brain, Blood vessels, Tissues, Tissue optics, Tumors, Visualization, Standards development, In vivo imaging, Adaptive optics optical coherence tomography

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Proceedings Article | 19 July 2019 Paper

Spectral domain OCT using achromatic phase shifter

Pavel Shilyagin, Dmitry Terpelov, Valentin Gelikonov, Grigory Gelikonov

Proceedings Volume 11078, 1107825 (2019) https://doi.org/10.1117/12.2527156

KEYWORDS: Phase shifts, Optical coherence tomography, Mirrors, Interferometers, Applied physics

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Proceedings Article | 19 July 2019 Paper

Optical coherence tomography in otitis media with effusion diagnosing

P. Shilyagin, A. Novozhilov, T. Abubakirov, G. Gelikonov, A. Shakhov, V. Gelikonov

Proceedings Volume 11078, 110780R (2019) https://doi.org/10.1117/12.2527147

KEYWORDS: Optical coherence tomography, Ear, Particles, Analytical research, 3D image processing, Tissues, Applied physics

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Proceedings Article | 26 February 2019 Presentation + Paper

Development of real-time multimodal OCT with manual operation capabilities and emergence of its applications in clinical practice

G. Gelikonov, L. Matveev, S. Yu. Ksenofontov, V. Matkivsky, A. Moiseev, A. Matveyev, D. Shabanov, P. Shilyagin, D. Terpelov, N. Gladkova, E. Zagaynova, V. Yu. Zaitsev, V. Gelikonov

Proceedings Volume 10867, 1086714 (2019) https://doi.org/10.1117/12.2511334

KEYWORDS: Optical coherence tomography, Tissues, Polarization, Angiography, Visualization, Lymphatic system, Tumors, Image classification, Luminescence, Signal processing

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Proceedings Article | 24 May 2018 Presentation

Optical coherence tomography for noninvasive evaluation of the middle ear effusion (Conference Presentation)

Pavel Shilyagin, Dmitry Terpelov, Valery Gelikonova, Alexey Novozhilov, Timur Abubakirov, Grigory Gelikonov, Andrey Shakhov, Valentin Gelikonov, Natalia Shiliagina

Proceedings Volume 10685, 106851O (2018) https://doi.org/10.1117/12.2307449

KEYWORDS: Optical coherence tomography, Ear, Particles, Image enhancement, Image analysis, Diagnostics, Mirrors, Backscatter, Switches, Statistical analysis

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The most valuable results for the use of OCT imaging in ENT diagnostics have been shown by Stephen Boppart and his group in Illinois Urbana-Champaign University. In 2016 this group demonstrated the possibility to reconstruct some viscosity properties of the effusion by the use of OCT providing some additional measurements. Our team have provided the pilot study on the possibility of detection of the effusion using the OCT device in 2014 13. The current work is devoted to improvement of Dr Boppart’s approach to examine the effusion viscosity. To provide the preliminary investigations we used the time-domain OCT device due to the reason of its clinical approval. This device provides about 200 A-scans per second, which is quite enough to register the Brownian movement of the scatterers in the middle ear effusion. All investigations were made by the use of thin (2.4 mm diameter) flexible forward-viewing probe 14 pushed through the standard ear mirror. The main disadvantage of the probe is the requirement of the contact between the tip and the tympanic membrane, which may cause some discomfort to the patient. In the order to enhance the image brightness behind the tympanic membrane the immersion was injected in the auditory meatus. The use of immersion also provides the reference level of scatterers mobility while the effusion viscosity was examined. The conventional OCT image of the eardrum demonstrates the high level of backscattering particles behind the membrane in the case of otitis media with effusion. Following 11, we switch scanning off and recorded images. The obtained image became time-resolved and moving scatterers are presented here as quite short horizontal lines on the image while the steady area is presented by long horizontal lines set. Dr Monroy used time-correlated analysis to estimate the mobility of particles suspended in the effusion. We propose to use the Fourier analysis of the image, which seems to be more informative. We implemented the 2D-Fourier transform to the OCT data recorded while the scanning was switched off. One can easily note the differences in the width of the spectrum between areas of eardrum, water immersion and effusion noting the effective spectral width. To numerically estimate the width of the Fourier image we fit every row data with the Gaussian shape. After that the FWHM parameters of the Gaussian shapes were used to obtain the in-depth profile of the particles “mobility. One can see that the obtained by proposed method particles “mobility” is quite different in cases of the water suspension and the effusion. We have proposed the method of estimation of the middle ear effusion viscosity using the Fourier analysis of the OCT data obtained by the fixed probe beam. The method provides the possibility to distinguish areas filled by water and effusion. We believe this approach to be useful in differentiation the grade of the otitis media with effusion in clinical conditions. This research was supported by Russian Science Foundation (project No 17-15-01507).

Proceedings Article | 15 March 2018 Presentation

Motion and compression correction for in vivo OCT with synthesized aperture (Conference Presentation)

Alexander Moiseev, Grigory Gelikonov, Sergey Ksenofontov, Pavel Shilyagin, Valentine Gelikonov

Proceedings Volume 10493, 104930R (2018) https://doi.org/10.1117/12.2292598

KEYWORDS: Optical coherence tomography, In vivo imaging, Image restoration, Motion measurement, Image processing, Resolution enhancement technologies, Synthetic apertures, Interferometry, Synthetic aperture microscopy, Digital imaging

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Proceedings Article | 4 March 2014 Paper

Over-depth artifacts elimination in spectral-domain optical coherence tomography

Pavel Shilyagin, Grigory Gelikonov, Valentin Gelikonov, Natalia Shilyagina

Proceedings Volume 8934, 89343H (2014) https://doi.org/10.1117/12.2038106

KEYWORDS: Optical coherence tomography, Beam shaping, Coherence (optics), Spectroscopy, Gaussian beams, Interferometers, Fourier transforms, Point spread functions, Control systems, Charge-coupled devices

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Proceedings Article | 4 March 2014 Paper

Interferometric synthetic aperture microscopy with automated parameter evaluation and phase equalization preprocessing

Alexander Moiseev, Grigory Gelikonov, Pavel Shilyagin, Dmitry Terpelov, Valentine Gelikonov

Proceedings Volume 8934, 893433 (2014) https://doi.org/10.1117/12.2041957

KEYWORDS: Optical coherence tomography, Image resolution, Fourier transforms, Diffraction, Refraction, Calibration, Interferometry, Synthetic aperture microscopy, Holograms, 3D image processing

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Proceedings Article | 1 February 2012 Paper

Single-shot full complex spectrum spectrometer-based OCT with a single-line photodiode array

Grigory Gelikonov, Valentin Gelikonov, Aleksandr Moiseev, Pavel Shilyagin

Proceedings Volume 8213, 82133L (2012) https://doi.org/10.1117/12.909003

KEYWORDS: Phase shifts, Glasses, Mirrors, Optical coherence tomography, Spectroscopy, Beam splitters, Prisms, Photodiodes, CCD image sensors, Charge-coupled devices

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Proceedings Article | 1 February 2012 Paper

Linear in-wavenumber optical spectrum registration in SD-OCT

Grigory Gelikonov, Valentin Gelikonov, Pavel Shilyagin

Proceedings Volume 8213, 82133H (2012) https://doi.org/10.1117/12.911484

KEYWORDS: Spectroscopy, Reconstruction algorithms, Image registration, Optical coherence tomography, Phase shift keying, Dispersion, Scattering, Modulation, Interferometers, Biomedical optics

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Proceedings Article | 30 January 2012 Paper

Digital refocusing in optical coherence tomography

Alexander Moiseev, Grigory Gelikonov, Pavel Shilyagin, Dmitry Terpelov, Valentin Gelikonov

Proceedings Volume 8213, 82132C (2012) https://doi.org/10.1117/12.911297

KEYWORDS: Optical coherence tomography, Image fusion, Fourier transforms, Data acquisition, Image resolution, Phase measurement, Phase shifts, Numerical simulations, Point spread functions, Convolution

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Proceedings Article | 7 June 2011 Paper

Blind deconvolution algorithm for restoration OCT images with diffraction limited resolution

Alexander Moiseev, Grigory Gelikonov, Pavel Shilyagin, Valentine Gelikonov

Proceedings Volume 8091, 80911W (2011) https://doi.org/10.1117/12.889731

KEYWORDS: Optical coherence tomography, Image resolution, Diffraction, Fourier transforms, Deconvolution, Numerical simulations, Scattering media, Convolution, Computer simulations, Applied physics

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Proceedings Article | 21 March 2011 Paper

Full complex spectrum simultaneous obtaining SD-OCT

Grigory Gelikonov, Valentin Gelikonov, Pavel Shilyagin

Proceedings Volume 7999, 799905 (2011) https://doi.org/10.1117/12.887396

KEYWORDS: Phase shifts, Mirrors, Glasses, Optical coherence tomography, Prisms, Spectroscopy, Beam splitters, Optics manufacturing, Interferometers, Refractive index

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Proceedings Article | 21 March 2011 Paper

Using phase gradient autofocus (PGA) algorithm for restoration OCT images with diffraction limited resolution

Alexander Moiseev, Grigory Gelikonov, Pavel Shilyagin, Valentine Gelikonov

Proceedings Volume 7999, 799906 (2011) https://doi.org/10.1117/12.887488

KEYWORDS: Optical coherence tomography, Image resolution, Diffraction, Synthetic aperture radar, Image processing, Fourier transforms, Numerical simulations, Scattering media, Error analysis, Applied physics

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Proceedings Article | 12 February 2011 Paper

Single-shot full-complex spectrum spectrometer-based OCT

Grigory Gelikonov, Valentin Gelikonov, Pavel Shilyagin

Proceedings Volume 7889, 788925 (2011) https://doi.org/10.1117/12.875091

KEYWORDS: Phase shifts, Mirrors, Optical coherence tomography, Glasses, Spectroscopy, Prisms, Beam splitters, Optics manufacturing, Interferometers, Refractive index

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Proceedings Article | 12 February 2011 Paper

Using phase gradient autofocus (PGA) algorithm for restoration OCT images with diffraction limited resolution

Alexander Moiseev, Grigory Gelikonov, Pavel Shilyagin, Valentin Gelikonov

Proceedings Volume 7889, 78893D (2011) https://doi.org/10.1117/12.874372

KEYWORDS: Optical coherence tomography, Image resolution, Diffraction, Fourier transforms, Synthetic aperture radar, Numerical simulations, Computer simulations, Scattering media, Convolution, Applied physics

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Proceedings Article | 20 February 2010 Paper

Coherent noise compensation improvement in spectral-domain optical coherence tomography

Grigory Gelikonov, Valentin Gelikonov, Irene Kasatkina, Dmitry Terpelov, Pavel Shilyagin

Proceedings Volume 7554, 755431 (2010) https://doi.org/10.1117/12.841337

KEYWORDS: Modulation, Optical coherence tomography, Phase modulation, Interference (communication), Interferometers, Phase shifts, Signal detection, Doppler effect, Capacitance, Scattering

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Proceedings Article | 11 February 2010 Paper

Real-time spectral domain OCT system for biological tissue investigation

Grigory Gelikonov, Valentin Gelikonov, Dmitry Terpelov, Pavel Shilyagin

Proceedings Volume 7547, 754706 (2010) https://doi.org/10.1117/12.853831

KEYWORDS: Optical coherence tomography, Spectroscopy, Prisms, Tissues, Diffraction gratings, Modulation, Phase modulation, Doppler effect, Phase shift keying, Distortion

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Proceedings Article | 18 February 2008 Paper

Linear wave-number spectrometer for spectral domain optical coherence tomography

Grigory Gelikonov, Valentin Gelikonov, Pavel Shilyagin

Proceedings Volume 6847, 68470N (2008) https://doi.org/10.1117/12.763541

KEYWORDS: Prisms, Spectroscopy, Optical coherence tomography, Modulation, Diffraction gratings, Glasses, Solids, Light sources, Charge-coupled devices, Reflectors

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Showing 5 of 21 publications

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