Dr. Hiroshi Kawaguchi Profile

Dr. Hiroshi Kawaguchi

Senior Researcher at AIST

SPIE Involvement:

Author

Publications (16)

Proceedings Article | 15 March 2023 Poster + Paper

Wearable fNIRS device of higher spatial resolution realized by triangular arrangement of dual-purpose optodes

Toru Yamada, Hiroshi Kawaguchi, Jun Watabe, Mitsuo Ohashi

Proceedings Volume 12365, 123650C (2023) https://doi.org/10.1117/12.2649791

KEYWORDS: Hemodynamics, Head, Spatial resolution, Signal detection, Cerebral cortex, Functional near infrared spectroscopy, Neuroimaging, Diffuse optical spectroscopy, Brain imaging

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Proceedings Article | 7 March 2023 Presentation + Paper

Determination of the absorption and reduced scattering coefficients by CW spatially resolved spectroscopy with long source-detector distances at high and low internal reflection

Yukio Yamada, Hiroshi Kawaguchi, Toru Yamada

Proceedings Volume 12376, 1237602 (2023) https://doi.org/10.1117/12.2649917

KEYWORDS: Internal reflection, Diffuse reflectance spectroscopy, Reflectivity, Numerical simulations, Scattering, Optical properties, Absorption, Photon transport

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SPIE Journal Paper | 31 May 2021 Open Access

Correlating functional near-infrared spectroscopy with underlying cortical regions of 0-, 1-, and 2-year-olds using theoretical light propagation analysis

Lin Cai, Eiji Okada, Yasuyo Minagawa, Hiroshi Kawaguchi

NPh, Vol. 8, Issue 02, 025009, (May 2021) https://doi.org/10.1117/12.10.1117/1.NPh.8.2.025009

KEYWORDS: Brain, Head, Near infrared spectroscopy, Optical properties, Geometrical optics, Tissues, Neurophotonics, Tissue optics, Magnetic resonance imaging, Skull

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SPIE Journal Paper | 5 August 2020 Open Access

Exclusive detection of cerebral hemodynamics in functional near-infrared spectroscopy by reflectance modulation of the scalp surface

Hiroshi Kawaguchi, Yukari Tanikawa, Toru Yamada

JBO, Vol. 25, Issue 08, 087001, (August 2020) https://doi.org/10.1117/12.10.1117/1.JBO.25.8.087001

KEYWORDS: Absorption, Reflectivity, Hemodynamics, Tissue optics, Mirrors, Absorbance, Modulation, Natural surfaces, Tissues

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Proceedings Article | 11 July 2019 Paper

Time-domain diffuse optical tomography with lp sparsity regularization for thyroid cancer imaging

Shinpei Okawa, Tetsuya Mimura, Hiroyuki Fujii, Hiroshi Kawaguchi, Yukari Tanikawa, Manabu Machida, Eiji Okada, Yoko Hoshi

Proceedings Volume 11074, 1107407 (2019) https://doi.org/10.1117/12.2526886

KEYWORDS: Image restoration, Cancer, Optical properties, Reconstruction algorithms, Algorithm development, Neck, Optical fibers, Diffuse optical tomography, Numerical simulations, Finite element methods

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Proceedings Article | 1 March 2019 Presentation + Paper

An fNIRS probe positioning system using augmented reality technology

Hiroshi Kawaguchi, Toru Yamada

Proceedings Volume 10874, 108741H (2019) https://doi.org/10.1117/12.2510731

KEYWORDS: Head, Brain, Video, Magnetic resonance imaging, Augmented reality, Cameras, 3D image processing, Neuroimaging, Prototyping, Near infrared spectroscopy, Neurophotonics, Machine learning

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Proceedings Article | 24 April 2018 Paper

Partial optical path length in the scalp in subject-specific head models for multi-distance probe configuration of near infrared spectroscopy

Taku Yanagisawa, Hiroshi Kawaguchi, Takayuki Obata, Eiji Okada

Proceedings Volume 10711, 107111J (2018) https://doi.org/10.1117/12.2319286

KEYWORDS: Geometrical optics, Head, Near infrared spectroscopy, Signal detection, Brain, Sensors, Blood, Monte Carlo methods, Electronics

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Proceedings Article | 18 April 2017 Paper

Estimation of functional areas probed by near-infrared spectroscopy instruments

Tomonori Nitta, Ryohei Tsuyuki, Hiroshi Kawaguchi, Eiji Okada

Proceedings Volume 10251, 102511Z (2017) https://doi.org/10.1117/12.2275046

KEYWORDS: Head, Light scattering, Scattering, Tissue optics, Brain activation, Neuroimaging, Imaging spectroscopy, Image registration, Near infrared spectroscopy, Brain

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Proceedings Article | 17 February 2017 Paper

Design and fabrication of a multi-layered solid dynamic phantom: validation platform on methods for reducing scalp-hemodynamic effect from fNIRS signal

Hiroshi Kawaguchi, Yukari Tanikawa, Toru Yamada

Proceedings Volume 10059, 1005925 (2017) https://doi.org/10.1117/12.2250485

KEYWORDS: Optical phantoms, Functional near infrared spectroscopy, Brain, Transmittance, Hemodynamics, Reflectivity, Absorption, Scattering, Tissues, Sensors, Absorbance

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Proceedings Article | 8 February 2017 Paper

Functional near infrared spectroscopy for awake monkey to accelerate neurorehabilitation study

Hiroshi Kawaguchi, Noriyuki Higo, Junpei Kato, Keiji Matsuda, Toru Yamada

Proceedings Volume 10051, 1005117 (2017) https://doi.org/10.1117/12.2250080

KEYWORDS: Hemodynamics, Functional near infrared spectroscopy, Magnetic resonance imaging, Tissue optics, Near infrared spectroscopy, Brain, Computer simulations, Diffusion, Head, Sensors, Skull, Tissues, Image segmentation, Finite element methods, Geometrical optics

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Proceedings Article | 17 June 2011 Paper

Segmentation of magnetic resonance images to construct human head model for diffuse optical imaging

Kazuki Kurihara, Hiroshi Kawaguchi, Yosuke Takahashi, Takayuki Obata, Eiji Okada

Proceedings Volume 8088, 80880J (2011) https://doi.org/10.1117/12.889813

KEYWORDS: Image segmentation, Magnetic resonance imaging, Head, Skull, Tissues, Magnetism, Brain, Diffuse optical imaging, Image processing algorithms and systems, Neuroimaging

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Proceedings Article | 15 June 2011 Paper

Phantom experiments for quantitative evaluation of topographic image by mapping algorithm

Yusuke Yoshida, Hirokazu Kakuta, Hiroshi Kawaguchi, Eiji Okada

Proceedings Volume 8088, 80881D (2011) https://doi.org/10.1117/12.889808

KEYWORDS: Brain activation, Absorption, Diamond, Head, Image analysis, Sensors, Brain mapping, Near infrared, Spatial resolution, Monte Carlo methods

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Proceedings Article | 12 July 2007 Paper

Evaluation of image reconstruction algorithm for near infrared topography by virtual head phantom

Hiroshi Kawaguchi, Eiji Okada

Proceedings Volume 6629, 662906 (2007) https://doi.org/10.1117/12.728105

KEYWORDS: Head, Image restoration, Absorption, Reconstruction algorithms, Near infrared, Spatial resolution, Brain activation, Tissues, Sensors, Magnetic resonance imaging

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Proceedings Article | 26 October 2005 Paper

Image reconstruction using spatial sensitivity profile with the constraint of spatial frequency in image for near-infrared topography

Hiroshi Kawaguchi, Eiji Okada

Proceedings Volume 5859, 585915 (2005) https://doi.org/10.1117/12.632871

KEYWORDS: Image restoration, Absorption, Reconstruction algorithms, Spatial resolution, Inverse problems, Linear filtering, Head, Spatial frequencies, Near infrared, Sensors

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Proceedings Article | 29 July 2004 Paper

Modeling of light distribution in the brain for topographical imaging

Eiji Okada, Toshiyuki Hayashi, Hiroshi Kawaguchi

Proceedings Volume 5486, (2004) https://doi.org/10.1117/12.571349

KEYWORDS: Absorption, Brain, Head, Neuroimaging, Sensors, Reconstruction algorithms, Spatial resolution, Scattering, Monte Carlo methods, Light scattering

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Proceedings Article | 15 October 2003 Paper

Evaluation of spatial resolution of near-infrared topography using spatial sensitivity profile

Hiroshi Kawaguchi, Toshiyuki Hayashi, Toshinori Kato, Eiji Okada

Proceedings Volume 5138, (2003) https://doi.org/10.1117/12.500403

KEYWORDS: Absorption, Reconstruction algorithms, Signal detection, Spatial resolution, Head, Image restoration, Brain activation, Sensors, Brain, Neuroimaging

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Showing 5 of 16 publications

Conference Committee Involvement (2)

Optical Tomography and Spectroscopy of Tissue XVI

25 January 2025 | San Francisco, California, United States

Diffuse Optical Spectroscopy and Imaging

25 June 2023 | Munich, Germany

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