Dr. Matthias Kohl-Bareis Profile

Dr. Matthias Kohl-Bareis

Doctor at RheinAhrCampus Remagen

SPIE Involvement:

Conference Program Committee | Conference Chair | Author

Publications (31)

PROCEEDINGS ARTICLE | June 24, 2013

Simultaneous imaging of cortical haemoglobin concentration and blood flow with RGB reflectometry and LASCA during cortical activation in rats

Proc. SPIE. 8804, Neurophotonics

KEYWORDS: Light sources, Imaging systems, Speckle, Cameras, Sensors, Blood, Reflectometry, Blood circulation, RGB color model, Cortical activation

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PROCEEDINGS ARTICLE | June 18, 2013

Efficient algorithm for the temporal and spatial based calculation of speckle contrast

Proc. SPIE. 8801, Novel Biophotonic Techniques and Applications II

KEYWORDS: Signal to noise ratio, Speckle, Light scattering, Laser scattering, Image resolution, Speckle analysis, Temporal resolution, Speckle pattern, Blood circulation, Spatial resolution

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PROCEEDINGS ARTICLE | June 14, 2013

Wavelength selection for the improvement of the signal to noise ratio for imaging of haemoglobin oxygenation with RGB reflectometry

Proc. SPIE. 8799, Diffuse Optical Imaging IV

KEYWORDS: Signal to noise ratio, Light sources, Light emitting diodes, Tissues, Imaging systems, Sensors, Reflectometry, Charge-coupled devices, Condition numbers, RGB color model

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PROCEEDINGS ARTICLE | June 15, 2011

Simultaneous imaging of haemoglobin oxygenation and blood flow with RGB reflectometry and LASCA during stroke in rats

Proc. SPIE. 8088, Diffuse Optical Imaging III

KEYWORDS: Light sources, Imaging systems, Speckle, Cameras, Sensors, Skin, Arteries, Reflectometry, Blood circulation, RGB color model

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PROCEEDINGS ARTICLE | June 15, 2011

Oxygenation of the calf muscle during an incremental, intermittent walking exercise assessed by NIRS

Proc. SPIE. 8088, Diffuse Optical Imaging III

KEYWORDS: Statistical analysis, Tissues, Blood, Heart, Oxygen, Blood circulation, Near infrared spectroscopy, Tissue optics, Spirometry, Absorption

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PROCEEDINGS ARTICLE | June 10, 2011

Evaluation of haemoglobin changes of skin and muscle tissue of the calf induced by topical application of a nonivamide / nicoboxil cream

Proc. SPIE. 8087, Clinical and Biomedical Spectroscopy and Imaging II

KEYWORDS: Injuries, Tissues, Sensors, Signal attenuation, Skin, Oxygen, Blood circulation, Hemodynamics, Near infrared spectroscopy, Tissue optics

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PROCEEDINGS ARTICLE | June 10, 2011

Design of a tissue oxygenation monitor and verification on human skin

Proc. SPIE. 8087, Clinical and Biomedical Spectroscopy and Imaging II

KEYWORDS: Doppler effect, Tissues, Signal attenuation, Blood, Skin, Oxygen, Blood circulation, Tissue optics, Laser tissue interaction, Absorption

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PROCEEDINGS ARTICLE | July 8, 2009

Imaging of cortical haemoglobin concentration with RGB reflectometry

Proc. SPIE. 7368, Clinical and Biomedical Spectroscopy

KEYWORDS: Light sources, Cameras, Sensors, Spectroscopy, CCD cameras, Reflectometry, Tissue optics, Condition numbers, RGB color model, Cortical activation

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PROCEEDINGS ARTICLE | July 8, 2009

Using broadband spatially resolved NIRS to assess muscle oxygenation during altered running protocols

Proc. SPIE. 7368, Clinical and Biomedical Spectroscopy

KEYWORDS: Biomedical optics, Modulation, Imaging systems, Spectroscopy, Heart, Oxygen, Near infrared spectroscopy, Tissue optics, Mechanical efficiency, Spirometry

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PROCEEDINGS ARTICLE | July 8, 2009

Tissue oxygenation during exercise measured with NIRS: a quality control study

Proc. SPIE. 7368, Clinical and Biomedical Spectroscopy

KEYWORDS: Optical fibers, Biomedical optics, Tissues, Signal attenuation, Spectroscopy, Oxygen, Near infrared spectroscopy, Applied sciences, Cardiology, Spectroscopes

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SPIE Journal Paper | July 1, 2009

Optical measurement of adipose tissue thickness and comparison with ultrasound, magnetic resonance imging, and callipers

Dmitri Geraskin, Heide Boeth, Matthias Kohl-Bareis

JBO Vol. 14 Issue 04

KEYWORDS: Tissue optics, Absorption, Tissues, Ultrasonography, Signal attenuation, Optical testing, Scattering, Near infrared spectroscopy, Spectroscopy, Skin

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PROCEEDINGS ARTICLE | July 12, 2007

Algorithms for muscle oxygenation monitoring corrected for adipose tissue thickness

Proc. SPIE. 6629, Diffuse Optical Imaging of Tissue

KEYWORDS: Tissues, Scattering, Signal attenuation, Ultrasonography, Spectroscopy, Oxygen, Monte Carlo methods, Near infrared spectroscopy, Tissue optics, Absorption

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PROCEEDINGS ARTICLE | July 12, 2007

Cerebral oxygenation monitoring during cardiac bypass surgery in infants with broad band spatially resolved spectroscopy

Proc. SPIE. 6629, Diffuse Optical Imaging of Tissue

KEYWORDS: Optical fibers, Surgery, Imaging systems, Sensors, Signal attenuation, Spectroscopy, Spectrometers, Oxygen, Charge-coupled devices, Absorption

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PROCEEDINGS ARTICLE | July 11, 2007

Spectroscopic measurement of adipose tissue thickness and comparison with ultrasound imaging

Proc. SPIE. 6628, Diagnostic Optical Spectroscopy in Biomedicine IV

KEYWORDS: Tissues, Signal attenuation, Ultrasonography, Spectroscopy, Error analysis, Imaging spectroscopy, Optical testing, Near infrared spectroscopy, Tissue optics, Absorption

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PROCEEDINGS ARTICLE | October 8, 2005

Muscle oxygenation during exercise under hypoxic conditions assessed by spatially resolved broad-band NIR spectroscopy

Proc. SPIE. 5859, Photon Migration and Diffuse-Light Imaging II

KEYWORDS: Near infrared, Tissues, Sensors, Signal attenuation, Blood, Spectroscopy, Skin, Oxygen, Near infrared spectroscopy, Tissue optics

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PROCEEDINGS ARTICLE | October 8, 2005

System for the measurement of blood flow and oxygenation in tissue applied to neurovascular coupling in brain

Proc. SPIE. 5859, Photon Migration and Diffuse-Light Imaging II

KEYWORDS: Tissues, Scattering, Sensors, Signal attenuation, Spectroscopy, Oxygen, Blood circulation, Tissue optics, Absorption, Brain

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PROCEEDINGS ARTICLE | October 15, 2003

Functional brain imaging by CW-NIRS coregistered by blood flow monitors

Proc. SPIE. 5138, Photon Migration and Diffuse-Light Imaging

KEYWORDS: Doppler effect, Visualization, Tissues, Blood, Blood circulation, Near infrared spectroscopy, Blood pressure, Absorption, Brain imaging, Brain

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SPIE Journal Paper | July 1, 2002

Noninvasive monitoring of cerebral blood flow by a dye bolus method: separation of brain from skin and skull signals

Matthias Kohl-Bareis, Hellmuth Obrig, Jens Steinbrink, Jasmin Malak, Kamil Uludag, Arno Villringer

JBO Vol. 7 Issue 03

KEYWORDS: Absorption, Signal attenuation, Tissue optics, Skin, Skull, Near infrared spectroscopy, Sensors, Tissues, Magnetic resonance imaging, Cerebral blood flow

SPIE Journal Paper | January 1, 2002

Crosstalk in the Lambert-Beer calculation for near-infrared wavelengths estimated by Monte simulations

Kamil Uludag, Matthias Kohl-Bareis, Jens Steinbrink, Hellmuth Obrig, Arno Villringer

JBO Vol. 7 Issue 01

KEYWORDS: Chromophores, Absorption, Tissues, Signal attenuation, Head, Optical spheres, Photons, Brain, Scattering, Monte Carlo methods

PROCEEDINGS ARTICLE | June 29, 2001

Noninvasive cerebral blood flow monitoring by a dye bolus method:separation of extra- and intracerebral absorption changes by frequency-domain spectroscopy

Proc. SPIE. 4250, Optical Tomography and Spectroscopy of Tissue IV

KEYWORDS: Tissues, Signal attenuation, Magnetic resonance imaging, Spectroscopy, Skin, Near infrared spectroscopy, Skull, Tissue optics, Signal detection, Absorption

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PROCEEDINGS ARTICLE | December 30, 1998

Multivariate spectral analysis of the beat-to-beat sampled cortical NIRS signals and the heart-rate variability

Proc. SPIE. 3566, Photon Propagation in Tissues IV

KEYWORDS: Signal to noise ratio, Statistical analysis, Visualization, Digital filtering, Heart, Near infrared spectroscopy, Picosecond phenomena, Chlorine, Cortical activation, Brain

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SPIE Conference Volume | December 30, 1998

Photon Propagation in Tissues IV

PROCEEDINGS ARTICLE | January 1, 1998

Changes in cytochrome-oxidase oxidation in the occipital cortex during visual simulation: improvement in sensitivity by the determination of the wavelength dependence of the differential pathlength

Proc. SPIE. 3194, Photon Propagation in Tissues III

KEYWORDS: Human subjects, Visualization, Signal attenuation, Blood, Head, Near infrared spectroscopy, Mass attenuation coefficient, Absorption, Oxidation

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PROCEEDINGS ARTICLE | January 1, 1998

Determination of optical properties by variation of boundary conditions

Proc. SPIE. 3194, Photon Propagation in Tissues III

KEYWORDS: Diffuse reflectance spectroscopy, Optical properties, Scattering, Sensors, Photons, Diffusion, Reflectivity, Multiple scattering, Head, Tissue optics

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PROCEEDINGS ARTICLE | August 18, 1997

Toward noninvasive optical human brain mapping: improvements of the spectral, temporal, and spatial resolution of near-infrared spectroscopy

Proc. SPIE. 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II

KEYWORDS: Visualization, Imaging systems, Blood, CCD cameras, Temporal resolution, Spectral resolution, Near infrared spectroscopy, Spatial resolution, Volume visualization, Brain mapping

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PROCEEDINGS ARTICLE | August 18, 1997

Monitoring of cerebral hemodynamics during open-heart surgery in children using near-infrared intensity-modulated spectroscopy

Proc. SPIE. 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II

KEYWORDS: Modulation, Tissues, Surgery, Scattering, Signal attenuation, Spectroscopy, Oxygen, Chromophores, Tissue optics, Absorption

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PROCEEDINGS ARTICLE | August 18, 1997

Near-infrared optical properties of ex-vivo human skin and subcutaneous tissues using reflectance and transmittance measurements

Proc. SPIE. 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II

KEYWORDS: Optical properties, Tissues, Scattering, Skin, Light scattering, Reflectivity, Monte Carlo methods, Transmittance, Integrating spheres, Absorption

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PROCEEDINGS ARTICLE | August 18, 1997

Optical properties of highly scattering media determined from the ratio of changes in attenuation, phase, and modulation depth

Proc. SPIE. 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II

KEYWORDS: Modulation, Optical properties, Tissues, Scattering, Sensors, Signal attenuation, Light scattering, Phase shift keying, Tissue optics, Absorption

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PROCEEDINGS ARTICLE | May 30, 1995

Glucose-induced changes in scattering and light transport in tissue-simulating phantoms

Proc. SPIE. 2389, Optical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation

KEYWORDS: Refractive index, Glucose, Modulation, Tissues, Scattering, Signal attenuation, Diffusion, Light scattering, Tissue optics, Absorption

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PROCEEDINGS ARTICLE | June 18, 1993

Imaging of superficially growing tumors by delayed observation of laser-induced fluorescence

Proc. SPIE. 1881, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy II

KEYWORDS: Tumor growth modeling, Tumors, Tissues, Luminescence, Laser induced fluorescence, In vivo imaging, Tissue optics, Natural surfaces, Laser tissue interaction, Absorption

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PROCEEDINGS ARTICLE | November 1, 1991

Imaging of tumors by time-delayed laser-induced fluorescence

Proc. SPIE. 1525, Future Trends in Biomedical Applications of Lasers

KEYWORDS: Biomedical optics, Tumors, Tissues, Luminescence, Laser scattering, Laser induced fluorescence, Tissue optics, Pulsed laser operation, Natural surfaces, Laser tissue interaction

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Showing 5 of 31 publications

Conference Committee Involvement (2)

Photon Migration and Diffuse-Light Imaging

22 June 2003 | Munich, Germany

Photon Migration in Tissues and Breast Tumor

9 September 1998 | Stockholm, Sweden

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