Mr. Kalle M. Kotilahti Profile

Kalle M. Kotilahti

Researcher at Aalto Univ School of Science and Technology

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Author

Publications (9)

Proceedings Article | 7 March 2023 Presentation + Paper

Improved utilization of frequency-domain data for optical tomographic imaging of the human brain

Pauliina Hirvi, Ilkka Nissilä, Ambika Maria, Qianqian Fang, Kalle Kotilahti, Juha Heiskala, Jetro Tuulari, Linnea Karlsson, Antti Hannukainen, Hasse Karlsson, Nuutti Hyvönen

Proceedings Volume 12376, 123760A (2023) https://doi.org/10.1117/12.2649042

KEYWORDS: Image restoration, Monte Carlo methods, Head, Brain, Matrices, Neuroimaging, Phase shifts, Voxels, Tissues, Visualization, Diffuse optical tomography, 3D image reconstruction

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SPIE Journal Paper | 1 August 2011 Open Access

Accelerometer-based method for correcting signal baseline changes caused by motion artifacts in medical near-infrared spectroscopy

Jaakko Virtanen, Kalle Kotilahti, Risto Ilmoniemi, Tommi Noponen, Juha Virtanen

JBO, Vol. 16, Issue 08, 087005, (August 2011) https://doi.org/10.1117/12.10.1117/1.3606576

KEYWORDS: Near infrared spectroscopy, Motion detection, Motion measurement, Hemodynamics, Signal detection, Sensors, Digital filtering, Electronic filtering, Signal attenuation, Filtering (signal processing)

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Proceedings Article | 10 July 2009 Paper

Combining near-infrared spectroscopy with electroencephalography and repetitive transcranial magnetic stimulation

Tiina Näsi, Kalle Kotilahti, Hanna Mäki, Ilkka Nissilä, Pekka Meriläinen

Proceedings Volume 7369, 736905 (2009) https://doi.org/10.1117/12.831650

KEYWORDS: Near infrared spectroscopy, Hemodynamics, Electroencephalography, Magnetism, Electrodes, Sensors, Visualization, Optical fibers, Magnetic resonance imaging, Alzheimer's disease

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Proceedings Article | 12 July 2007 Paper

Optical tomographic imaging of activation of the infant auditory cortex using perturbation Monte Carlo with anatomical a priori information

Juha Heiskala, Kalle Kotilahti, Lauri Lipiäinen, Petri Hiltunen, P. Ellen Grant, Ilkka Nissilä

Proceedings Volume 6629, 66290T (2007) https://doi.org/10.1117/12.728276

KEYWORDS: Data modeling, Tissue optics, Absorption, Magnetic resonance imaging, Monte Carlo methods, Optical properties, Photons, Brain, Head, Finite element methods

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SPIE Journal Paper | 1 November 2006 Open Access

Comparison between a time-domain and a frequency-domain system for optical tomography

Ilkka Nissilä, Jeremy Hebden, David Jennions, Jenni Heino, Martin Schweiger, Kalle Kotilahti, Tommi Noponen, Adam Gibson, S. Jaervenpaeae, Lauri Lipiäinen, Toivo Katila

JBO, Vol. 11, Issue 06, 064015, (November 2006) https://doi.org/10.1117/12.10.1117/1.2400700

KEYWORDS: Data modeling, Sensors, Imaging systems, Time metrology, Finite element methods, Optical fibers, Optical properties, Optical tomography, Tissue optics, Image quality

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Proceedings Article | 28 April 2005 Paper

Near-infrared spectroscopic imaging of stimulus-related hemodynamic responses on the neonatal auditory cortices

Kalle Kotilahti, Ilkka Nissila, Riikka Makela, Tommi Noponen, Lauri Lipiainen, Nasia Gavrielides, Timo Kajava, Minna Huotilainen, Vineta Fellman, Pekka Merilainen, Toivo Katila

Proceedings Volume 5693, (2005) https://doi.org/10.1117/12.590180

KEYWORDS: Near infrared spectroscopy, Sensors, Tissue optics, Hemodynamics, Spectroscopy, Imaging spectroscopy, Brain, Ear, Microelectromechanical systems, Switches

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Proceedings Article | 28 April 2005 Paper

Simultaneous diffuse near-infrared imaging of hemodynamic and oxygenation changes and electroencephalographic measurements of neuronal activity in the human brain

Tommi Noponen, Dubravko Kicic, Kalle Kotilahti, Timo Kajava, Seppo Kahkonen, Ilkka Nissila, Pekka Merilainen, Toivo Katila

Proceedings Volume 5693, (2005) https://doi.org/10.1117/12.588207

KEYWORDS: Electroencephalography, Hemodynamics, Brain, Visualization, Optical imaging, Signal to noise ratio, Neuroimaging, Neurovascular coupling, Electrodes, Optical fibers

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Proceedings Article | 29 July 2003 Paper

Near-infrared measurements of hemodynamic and oxygenation changes on the frontal cortex during breath holding, hyperventilation, and natural sleep

Tommi Noponen, Kalle Kotilahti, Jussi Toppila, Ilkka Nissila, Tapani Salmi, Timo Kajava, Toivo Katila

Proceedings Volume 4955, (2003) https://doi.org/10.1117/12.476809

KEYWORDS: Hemodynamics, Optical fibers, Heart, Tissues, Sensors, Polysomnography, Tissue optics, Oxygen, Electronic filtering, Switches

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Proceedings Article | 29 July 2003 Paper

Optical topographic studies of adults and neonates

Ilkka Nissila, Kalle Kotilahti, Tommi Noponen, Minna Huotilainen, Risto Naatanen, Toivo Katila

Proceedings Volume 4955, (2003) https://doi.org/10.1117/12.478127

KEYWORDS: Sensors, Hemodynamics, Brain, Optical fibers, Near infrared spectroscopy, Tissues, Phase measurement, Signal detection, Head, Scattering

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Showing 5 of 9 publications

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