Prof. Masatsugu Niwayama Profile

Prof. Masatsugu Niwayama

Professor at Shizuoka Univ

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Author

Publications (13)

Proceedings Article | 21 February 2020 Paper

A time-resolved near-infrared spectroscopy based on CMOS image sensor

De Xing Lioe, Masashi Hakamata, Keita Yasutomi, Keiichiro Kagawa, Masatsugu Niwayama, Yasuko Fukushi, Seiji Yamamoto, Shoji Kawahito

Proceedings Volume 11234, 112340P (2020) https://doi.org/10.1117/12.2545581

KEYWORDS: Near infrared spectroscopy, CMOS sensors, Absorption, Sensors, Scattering, Laser scattering, Reflectivity, Image sensors, Light sources, Light scattering

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SPIE Journal Paper | 9 March 2018 Open Access

Voxel-based measurement sensitivity of spatially resolved near-infrared spectroscopy in layered tissues

Masatsugu Niwayama

JBO, Vol. 23, Issue 03, 030503, (March 2018) https://doi.org/10.1117/12.10.1117/1.JBO.23.3.030503

KEYWORDS: Tissues, Near infrared spectroscopy, Brain, Sensors, Natural surfaces, Absorption, Animal model studies, Fetus, Monte Carlo methods, Oximetry

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SPIE Journal Paper | 12 April 2016 Open Access

Craniofacial tissue oxygen saturation is associated with blood pH using an examiner’s finger-mounted tissue oximetry in mice

Toshiyuki Uchida, Naohiro Kanayama, Kenta Kawai, Masatsugu Niwayama

JBO, Vol. 21, Issue 04, 040502, (April 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.4.040502

KEYWORDS: Fetus, Blood, Oximetry, Tissues, Oxygen, Sensors, Near infrared spectroscopy, Head, Statistical analysis, Light emitting diodes

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SPIE Journal Paper | 24 June 2014 Open Access

Examiner’s finger-mounted fetal tissue oximetry

Naohiro Kanayama, Masatsugu Niwayama

JBO, Vol. 19, Issue 06, 067008, (June 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.6.067008

KEYWORDS: Oximetry, Sensors, Brain, Oxygen, Tissues, Head, Oximeters, Tissue optics, Near infrared spectroscopy, Fetus

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SPIE Journal Paper | 1 October 2001

Theoretical and experimental studies on linear and nonlinear algorithms for the measurement of muscle oxygenation using continuous-wave near-infared spectroscopy

Jun Shao, Ling Lin, Masatsugu Niwayama, Nobuki Kudo, Katsuyuki Yamamoto

OE, Vol. 40, Issue 10, (October 2001) https://doi.org/10.1117/12.10.1117/1.1401755

KEYWORDS: Absorption, Algorithms, Tissues, Algorithm development, Blood, Near infrared spectroscopy, Nonlinear optics, Oxygen, Error analysis, Absorbance

Proceedings Article | 29 June 2001 Paper

Functional imaging of muscle oxygenation using a 200-channel cw NIRS system

Katsuyuki Yamamoto, Masatsugu Niwayama, Daisuke Kohata, Nobuki Kudo, Takatumi Hamaoka, Ryotaro Kime, Toshihito Katsumura

Proceedings Volume 4250, (2001) https://doi.org/10.1117/12.434486

KEYWORDS: Blood, Imaging systems, Near infrared spectroscopy, Tissue optics, Spatial resolution, Functional imaging, Light emitting diodes, Tissues, Sensors, Diodes

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Proceedings Article | 4 July 2000 Paper

Development of 200-channel mapping system for tissue oxygenation measured by near-infrared spectroscopy

Masatsugu Niwayama, Daisuke Kohata, Jun Shao, Nobuki Kudo, Takatumi Hamaoka, Toshihito Katsumura, Katsuyuki Yamamoto

Proceedings Volume 4082, (2000) https://doi.org/10.1117/12.390566

KEYWORDS: Near infrared spectroscopy, Tissues, Tissue optics, Skin, Blood, Diodes, In vivo imaging, Brain mapping, Sensors, Blood circulation

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Proceedings Article | 4 July 2000 Paper

Determination of a quantitative algorithm for the measurement of muscle oxygenation using cw near-infrared spectroscopy: mean optical pathlength without the influence of the adipose tissue

Jun Shao, Ling Lin, Masatsugu Niwayama, Nobuki Kudo, Katsuyuki Yamamoto

Proceedings Volume 4082, (2000) https://doi.org/10.1117/12.390526

KEYWORDS: Absorption, Tissue optics, Near infrared spectroscopy, Tissues, Algorithms, Protactinium, Optical properties, Algorithm development, Scattering, Optical fibers

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Proceedings Article | 3 May 2000 Paper

Quantitative muscle oxygenation measurement using NIRS with correction for the influence of a fat layer: comparison of oxygen consumption rates with measurements by other techniques

Masatsugu Niwayama, Takatumi Hamaoka, Ling Lin, Jun Shao, Nobuki Kudo, Chietsugu Katoh, Katsuyuki Yamamoto

Proceedings Volume 3911, (2000) https://doi.org/10.1117/12.384911

KEYWORDS: Near infrared spectroscopy, Oxygen, Positron emission tomography, Tissues, Blood, Tissue optics, Oximeters, Signal detection, In vivo imaging, Light sources

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Proceedings Article | 15 July 1999 Paper

Quantitative measurement of muscle oxygenation by NIRS: analysis of the influences of a subcutaneous fat layer and skin

Masatsugu Niwayama, Ling Lin, Jun Shao, Toshikazu Shiga, Nobuki Kudo, Katsuyuki Yamamoto

Proceedings Volume 3597, (1999) https://doi.org/10.1117/12.356822

KEYWORDS: Skin, Monte Carlo methods, Near infrared spectroscopy, Oxygen, Tissues, Absorption, Tissue optics, In vivo imaging, Ischemia, Oximeters

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Proceedings Article | 24 April 1998 Paper

Near-infrared muscle oximeter that can correct the influence of a subcutaneous fat layer

Katsuyuki Yamamoto, Masatsugu Niwayama, Ling Lin, Toshikazu Shiga, Nobuki Kudo, Makoto Takahashi

Proceedings Volume 3257, (1998) https://doi.org/10.1117/12.306080

KEYWORDS: Monte Carlo methods, Absorbance, Tissues, Sensors, Oximeters, Ischemia, Near infrared spectroscopy, Oxygen, Tissue optics, Blood

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Proceedings Article | 24 April 1998 Paper

Two-layered phantom experiments for characterizing the influence of a fat layer on measurement of muscle oxygenation using NIRS

Ling Lin, Masatsugu Niwayama, Toshikazu Shiga, Nobuki Kudo, Makoto Takahashi, Katsuyuki Yamamoto

Proceedings Volume 3257, (1998) https://doi.org/10.1117/12.306099

KEYWORDS: Absorption, Blood, Tissue optics, Monte Carlo methods, Light scattering, Tissues, Near infrared spectroscopy, Reflectivity, Scattering, Optical properties

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Proceedings Article | 1 January 1998 Paper

Accurate NIRS measurement of muscle oxygenation by correcting the influence of a subcutaneous fat layer

Katsuyuki Yamamoto, Masatsugu Niwayama, Ling Lin, Toshikazu Shiga, Nobuki Kudo, Makoto Takahashi

Proceedings Volume 3194, (1998) https://doi.org/10.1117/12.301049

KEYWORDS: Near infrared spectroscopy, Tissue optics, Monte Carlo methods, Reflectivity, Tissues, Oxygen, Ultrasonography, Sensors

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Showing 5 of 13 publications

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