Dr. Ervin Nippolainen Profile

Dr. Ervin Nippolainen

Researcher at Univ of Eastern Finland

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Author

Publications (19)

SPIE Journal Paper | 13 December 2023 Open Access

Broadband scattering properties of articular cartilage zones and their relationship with the heterogenous structure of articular cartilage extracellular matrix

Iman Kafian-Attari, Ervin Nippolainen, Florian Bergmann, Akuroma George, Petri Paakkari, Arash Mirhashemi, Florian Foschum, Alwin Kienle, Juha Töyräs, Isaac O. Afara

JBO, Vol. 28, Issue 12, 125003, (December 2023) https://doi.org/10.1117/12.10.1117/1.JBO.28.12.125003

KEYWORDS: Cartilage, Tissues, Light scattering, Collagen, Rayleigh scattering, Scattering, Anatomy, Biological samples, Mie scattering, Transmittance

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SignificanceArticular cartilage exhibits a zonal architecture, comprising three distinct zones: superficial, middle, and deep. Collagen fibers, being the main solid constituent of articular cartilage, exhibit unique angular and size distribution in articular cartilage zones. There is a gap in knowledge on how the unique properties of collagen fibers across articular cartilage zones affect the scattering properties of the tissue.AimThis study hypothesizes that the structural properties of articular cartilage zones affect its scattering parameters. We provide scattering coefficient and scattering anisotropy factor of articular cartilage zones in the spectral band of 400 to 1400 nm. We enumerate the differences and similarities of the scattering properties of articular cartilage zones and provide reasoning for these observations.ApproachWe utilized collimated transmittance and integrating sphere measurements to estimate the scattering coefficients of bovine articular cartilage zones and bulk tissue. We used the relationship between the scattering coefficients to estimate the scattering anisotropy factor. Polarized light microscopy was applied to estimate the depth-wise angular distribution of collagen fibers in bovine articular cartilage.ResultsWe report that the Rayleigh scatterers contribution to the scattering coefficients, the intensity of the light scattered by the Rayleigh and Mie scatterers, and the angular distribution of collagen fibers across tissue depth are the key parameters that affect the scattering properties of articular cartilage zones and bulk tissue. Our results indicate that in the short visible region, the superficial and middle zones of articular cartilage affect the scattering properties of the tissue, whereas in the far visible and near-infrared regions, the articular cartilage deep zone determines articular cartilage scattering properties.ConclusionThis study provides scattering properties of articular cartilage zones. Such findings support future research to utilize optical simulation to estimate the penetration depth, depth-origin, and pathlength of light in articular cartilage for optical diagnosis of the tissue.

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Proceedings Article | 5 May 2020 Paper

Optical properties of articular cartilage in the near-Infrared spectral range are related to its proteoglycan content

Iman Kafian-Attari, Dmitry Semenov, Ervin Nippolainen, Markku Hauta-Kasari, Juha Töyräs, Isaac Afara

Proceedings Volume 11363, 113630W (2020) https://doi.org/10.1117/12.2555291

KEYWORDS: Cartilage, Optical properties, Light scattering, Tissues, Bone, Natural surfaces, Tissue optics, Diffuse optical spectroscopy, Light-matter interactions, Laser tissue interaction, Near infrared spectroscopy, Chemometrics

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Proceedings Article | 9 March 2020 Presentation

Mid-infrared fiber spectroscopy for detection of cartilage degeneration in osteoarthritis (Conference Presentation)

Olga Bibikova, Valentin Mironovich, Iskander Usenov, Elena Feliksberger, Alexey Bocharnikov, Anastasia Surkova, Valeria Belikova, Ervin Nippolainen, Isaac Afara, Julian Haas, Vesa Virtanen, Lassi Rieppo, Harold Brommer, René van Weeren, Michael Pleyer, Johannes Koeth, Markus Nägele, Juha Töyräs, Boris Mizaikoff, Tatiana Sakharova, Viacheslav Artyushenko

Proceedings Volume 11233, 112330J (2020) https://doi.org/10.1117/12.2544893

KEYWORDS: Spectroscopy, Cartilage, Mid-IR, Quantum cascade lasers, FT-IR spectroscopy, Tissues, Molecules, Molecular spectroscopy, Fiber optics, Diagnostics

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Proceedings Article | 4 March 2019 Presentation

Multi-spectral fiber spectroscopy methods as solutions for label-free medical diagnostics (Conference Presentation)

Olga Bibikova, Ervin Nippolainen, Isaac Afara, Julian Haas, Vesa Virtanen, Lasi Rieppo, Sonata Adomaviciute, Harold Brommer, René van Weeren, Anastasia Melenteva, Valeria Belikova, Urszula Zabarylo, Olaf Minet, Juha Töyräs, Valdas Sablinskas, Boris Mizaikoff, Viacheslav Artyushenko

Proceedings Volume 10890, 108901Q (2019) https://doi.org/10.1117/12.2509174

KEYWORDS: Tissues, Medical diagnostics, Spectroscopy, Spectroscopes, Fiber optics, Tissue optics, Kidney, Cartilage, Optical spectroscopy, Molecular spectroscopy

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SPIE Journal Paper | 11 April 2014 Open Access

Fast vascular component of cortical spreading depression revealed in rats by blood pulsation imaging

Victor Teplov, Artem Shatillo, Ervin Nippolainen, Olli Gröhn, Rashid Giniatullin, Alexei Kamshilin

JBO, Vol. 19, Issue 04, 046011, (April 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.4.046011

KEYWORDS: Blood, Wave propagation, Imaging systems, Cameras, Video, Electrodes, Visualization, Brain, Modulation, Signal to noise ratio

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Proceedings Article | 11 September 2012 Paper

Light penetration depth of a turbid media estimated by cross-correlation of speckle patterns

Igor Sidorov, Serguei Miridonov, Ervin Nippolainen, Alexei Kamshilin

Proceedings Volume 8413, 84130B (2012) https://doi.org/10.1117/12.978218

KEYWORDS: Laser phosphor displays, Speckle pattern, Holograms, Light scattering, Diffraction, Volume holography, Scattering, Correlation function, Refractive index, Optical properties

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Proceedings Article | 11 September 2012 Paper

Detection of surface defects by means of dynamic speckles

Ervin Nippolainen, Igor Sidorov, Alexei Kamshilin

Proceedings Volume 8413, 841313 (2012) https://doi.org/10.1117/12.976294

KEYWORDS: Defect detection, Spatial filters, Photodiodes, Modulation, Speckle pattern, Optical filters, Inspection, Wavefronts, Speckle, Light scattering

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SPIE Journal Paper | 4 May 2012

Accuracy of the reflectance spectrum recovery in a light-emitting diode-based multispectral imaging system

Laure Fauch, Ervin Nippolainen, Alexei Kamshilin

OE, Vol. 51, Issue 5, 053201, (May 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.5.053201

KEYWORDS: Reflectivity, Light emitting diodes, Multispectral imaging, Imaging systems, Error analysis, Calibration, Cameras, Optical fibers, Digital cameras, Reflection

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Proceedings Article | 17 May 2010 Paper

Novel optoelectronic system for fast acquisition of reflection spectra

V. Teplov, L. Fauch, R. Saarenheimo, E. Nippolainen, A. Kamshilin

Proceedings Volume 7469, 74690S (2010) https://doi.org/10.1117/12.866772

KEYWORDS: Reflection, Light emitting diodes, CCD cameras, Light sources, Optoelectronics, Optical fibers, Switching, Cameras, Spatial resolution, Reflectivity

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Proceedings Article | 5 June 2008 Paper

Optical orientation of dipolar centers in Bi12SiO20 crystal grown in an oxygen-free atmosphere

Alexander Grachev, Ervin Nippolainen, Alexei Kamshilin

Proceedings Volume 7022, 70220B (2008) https://doi.org/10.1117/12.803914

KEYWORDS: Crystals, Polarization, Modulation, Dichroic materials, Atmospheric optics, Absorption, Laser beam diagnostics, Argon, Laser crystals, Optical amplifiers

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Proceedings Article | 5 June 2008 Paper

Dynamic-speckle profilometer for online measurements of coating thickness

Alexei Kamshilin, Dmitry Semenov, Ervin Nippolainen, Serguei Miridonov

Proceedings Volume 7022, 70220Q (2008) https://doi.org/10.1117/12.803943

KEYWORDS: Spatial filters, Speckle, Sensors, Speckle pattern, Photodiodes, Coating, Optical filters, Modulation, Image filtering, Profilometers

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Proceedings Article | 1 August 2007 Paper

Fast adaptive interferometer based on CdTe crystal and low power radiation

Roman Romashko, Yuriy Kulchin, Salvatore Di Giloramo, Ervin Nippolainen, Jean Claude Launay, Alexei Kamshilin

Proceedings Volume 6785, 678512 (2007) https://doi.org/10.1117/12.757865

KEYWORDS: Crystals, Holograms, Modulation, Interferometers, Polarization, Phase shift keying, Fiber optics, Phase modulation, Laser crystals, Holographic interferometry

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Proceedings Article | 15 September 2006 Paper

Fast distance measurements based on dynamic speckles induced by acousto-optic scanning

Ervin Nippolainen, Dmitry Semenov, Alexei Kamshilin, Andrei Belyaev, Sergei Andreev, Boris Gurevich

Proceedings Volume 6341, 634128 (2006) https://doi.org/10.1117/12.695494

KEYWORDS: Modulation, Sensors, Spatial filters, Speckle pattern, Distance measurement, Photodiodes, Surface plasmons, Speckle, Crystals, Acoustics

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Proceedings Article | 21 June 2006 Paper

Adaptive fiber optic interferometer with CdTe crystal for vibrations measurement

Roman Romashko, Salvatore Di Giloramo, Ervin Nippolainen, Jean Claude Launay, Alexei Kamshilin

Proceedings Volume 6345, 634516 (2006) https://doi.org/10.1117/12.693162

KEYWORDS: Crystals, Holograms, Modulation, Polarization, Interferometers, Phase shift keying, Fiber optics, Fiber optics tests, Laser crystals, Phase modulation

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Proceedings Article | 9 June 2006 Paper

Computer acquisition of 3D images utilizing dynamic speckles

Alexei Kamshilin, Dmitry Semenov, Ervin Nippolainen, Erik Raita

Proceedings Volume 6252, 62521E (2006) https://doi.org/10.1117/12.677058

KEYWORDS: Speckle pattern, Modulation, Spatial filters, Photodiodes, Acoustics, Light scattering, Distance measurement, Mirrors, 3D acquisition, 3D metrology

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Proceedings Article | 9 June 2006 Paper

Surface profile acquisition using dynamic speckles

Dmitry Semenov, Ervin Nippolainen, Erik Raita, Alexei Kamshilin

Proceedings Volume 6162, 61620B (2006) https://doi.org/10.1117/12.674973

KEYWORDS: Spatial filters, Modulation, Speckle pattern, Signal to noise ratio, Optical filters, Speckle, Photodiodes, Light scattering, Ronchi rulings, Profilometers

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Proceedings Article | 13 June 2005 Paper

Fast distance sensing by use of the speckle effect

Ervin Nippolainen, Dmitry Semenov, Alexei Kamshilin, Andrey Belyaev, Sergei Andreev, Boris Gurevich

Proceedings Volume 5856, (2005) https://doi.org/10.1117/12.612576

KEYWORDS: Speckle pattern, Sensors, Photodiodes, Surface plasmons, Modulation, Optical filters, Crystals, Speckle, Light scattering, Computing systems

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Proceedings Article | 10 April 2001 Paper

Fast photorefractive response in BSO in the near infrared

Erik Raita, Oleg Kobozev, Ervin Nippolainen, Alexei Kamshilin, Victor Prokofiev

Proceedings Volume 4415, (2001) https://doi.org/10.1117/12.425492

KEYWORDS: Crystals, Modulation, Polarization, Near infrared, Oxygen, Infrared radiation, Dielectric polarization, Speckle, Speckle pattern, Photorefraction

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Proceedings Article | 19 July 1999 Paper

Photorefractive effects in long narrow BSO-crystals with applied electric field

Gregor Cedilnik, Matthias Esselbach, Armin Kiessling, Richard Kowarschik, Ervin Nippolainen, Alexei Kamshilin, Victor Prokofiev

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354867

KEYWORDS: Crystals, Photorefraction, Diffraction gratings, Picosecond phenomena, Holograms, Electron transport, Absorption, Polonium, Particle swarm optimization, Spatial frequencies

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Showing 5 of 19 publications

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