Prof. Masanori Fujita Profile

Prof. Masanori Fujita

at National Defense Medical College

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Author

Publications (10)

Proceedings Article | 17 February 2020 Paper

Photoacoustic tomography reconstructing absorption coefficient and effect of regularization minimizing p-norm

Shinpei Okawa, Takeshi Hirasawa, Toshihiro Kushibiki, Masanori Fujita, Miya Ishihara

Proceedings Volume 11240, 112403N (2020) https://doi.org/10.1117/12.2551478

KEYWORDS: Spatial resolution, Transducers, Photoacoustic tomography, Light scattering, Cancer, Photoacoustic imaging

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Proceedings Article | 27 February 2019 Paper

Validation study of a quantitative photoacoustic image reconstruction using Monte Carlo method and linearization

Shinpei Okawa, Takeshi Hirasawa, Kazuhiro Tsujita, Toshihiro Kushbiki, Masanori Fujita, Miya Ishihara

Proceedings Volume 10878, 1087855 (2019) https://doi.org/10.1117/12.2511836

KEYWORDS: Blood vessels, Absorption, Ultrasonography, Monte Carlo methods, Tissues, Transducers, Light scattering, 3D image reconstruction

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Proceedings Article | 19 February 2018 Paper

Multispectral photoacoustic tomography for detection of small tumors inside biological tissues

Takeshi Hirasawa, Shinpei Okawa, Kazuhiro Tsujita, Toshihiro Kushibiki, Masanori Fujita, Yasuteru Urano, Miya Ishihara

Proceedings Volume 10494, 104943M (2018) https://doi.org/10.1117/12.2293438

KEYWORDS: Sensors, Acquisition tracking and pointing, Signal detection, Tissues, Absorbance, Tissue optics, Image sensors, Tumors, Visualization, Acoustics

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Proceedings Article | 3 March 2014 Paper

Quantification of optical attenuation coefficient based on continuous wavelet transform of photoacoustic signals measured by a focused broadband acoustic sensor

T. Hirasawa, S. Okawa, M. Fujita, T. Kushibiki, M. Ishihara

Proceedings Volume 8943, 89435Z (2014) https://doi.org/10.1117/12.2041676

KEYWORDS: Signal attenuation, Sensors, Blood vessels, Acoustics, Signal detection, Inverse optics, Continuous wavelet transforms, Near field optics, Tissue optics, Photoacoustic spectroscopy

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Proceedings Article | 4 March 2013 Paper

Improvement in quantifying optical absorption coefficients based on continuous wavelet-transform by correcting distortions in temporal photoacoustic waveforms

Takeshi Hirasawa, Masanori Fujita, Shinpei Okawa, Toshihiro Kushibiki, Miya Ishihara

Proceedings Volume 8581, 85814J (2013) https://doi.org/10.1117/12.2006305

KEYWORDS: Absorption, Acoustics, Sensors, Calibration, Continuous wavelet transforms, Signal detection, Photoacoustic spectroscopy, Tissue optics, Pulsed laser operation, Biomedical optics

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Proceedings Article | 23 February 2012 Paper

Continuous wavelet-transform analysis of photoacoustic signal waveform to determine optical absorption coefficient

T. Hirasawa, M. Ishihara, K. Tsujita, K. Hirota, K. Irisawa, M. Kitagaki, M. Fujita, M. Kikuchi

Proceedings Volume 8223, 822333 (2012) https://doi.org/10.1117/12.908088

KEYWORDS: Absorption, Continuous wavelet transforms, Wavelets, Tissue optics, Ultrasonography, Sensors, Signal attenuation, Signal generators, Signal to noise ratio, Scattering

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Proceedings Article | 23 February 2011 Paper

Multifunctional photoacoustic signals detected by P(VDF/TrFE) film sensor with a wide range of frequency

M. Ishihara, T. Hirasawa, K. Tsujita, M. Kitagaki, I. Bansaku, M. Fujita, M. Kikuchi

Proceedings Volume 7899, 78992Z (2011) https://doi.org/10.1117/12.874542

KEYWORDS: Photoacoustic spectroscopy, Sensors, Signal detection, Transducers, Photoacoustic imaging, Ferroelectric materials, Absorption, Image sensors, Blood vessels, Optical fibers

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Proceedings Article | 23 February 2011 Paper

Analysis and verification of dominant factor to obtain the high resolution photo-acoustic imaging

T. Hirasawa, M. Ishihara, M. Kitagaki, I. Bansaku, M. Fujita, M. Kikuchi

Proceedings Volume 7899, 789932 (2011) https://doi.org/10.1117/12.874745

KEYWORDS: Sensors, Image resolution, Image sensors, Acoustics, Signal detection, Reconstruction algorithms, Tissue optics, Absorption, Imaging systems, Ultrasonography

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Proceedings Article | 12 September 2003 Paper

Diode laser vascular welding of swine aorta under scattering light monitoring

Sayaka Ohmori, Tsunenori Arai, Masanori Fujita, Noriko Usami, Makoto Kikuchi, Tadaaki Maehara

Proceedings Volume 4949, (2003) https://doi.org/10.1117/12.476396

KEYWORDS: Light scattering, Laser scattering, Laser welding, Scattering, Semiconductor lasers, Fiber lasers, Temperature metrology, Laser therapeutics, Blood circulation, Blood

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Proceedings Article | 10 June 2002 Paper

Photoacoustic signal measurement for burned skins in the spectral range of 500-650 nm: experiment with rat burn models

Mutsuo Yamazaki, Shunichi Sato, Daizo Saito, Masanori Fujita, Yoshiaki Okada, Makoto Kikuchi, Hiroshi Ashida, Minoru Obara

Proceedings Volume 4618, (2002) https://doi.org/10.1117/12.469862

KEYWORDS: Photoacoustic spectroscopy, Skin, Transducers, Blood, Tissues, Optical parametric oscillators, Acoustics, Quartz, Biomedical optics, Defense and security

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Showing 5 of 10 publications

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