Mr. Kazuhiro Tsujita Profile

Kazuhiro Tsujita

Researcher at National Defense Medical College

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Publications (9)

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

3D quantitative photoacoustic image reconstruction using Monte Carlo method and linearization

Shinpei Okawa, Takeshi Hirasawa, Kazuhiro Tsujita, Toshihiro Kushibiki, Miya Ishihara

Proceedings Volume 10494, 104944Y (2018) https://doi.org/10.1117/12.2293229

KEYWORDS: Reconstruction algorithms, Monte Carlo methods, 3D modeling, 3D image reconstruction, Numerical simulations, Photoacoustic imaging

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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 | 11 March 2015 Paper

Development of photoacoustic imaging technology overlaid on ultrasound imaging and its clinical application

Miya Ishihara, Kazuhiro Tsujita, Akio Horiguchi, Kaku Irisawa, Tomohiro Komatsu, Makoto Ayaori, Takeshi Hirasawa, Tadashi Kasamatsu, Kazuhiro Hirota, Hitoshi Tsuda, Katsunori Ikewaki, Tomohiko Asano

Proceedings Volume 9323, 93232K (2015) https://doi.org/10.1117/12.2076456

KEYWORDS: Ultrasonography, Veins, Defense and security, Biopsy, Photoacoustic imaging, Visualization, Clinical research, Magnetic resonance imaging, Tissue optics, Medicine

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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 2012 Paper

Influence of laser pulse width to the photoacoustic temporal waveform and the image resolution with a solid-state excitation laser

K. Irisawa, T. Hirasawa, K. Hirota, K. Tsujita, M. Ishihara

Proceedings Volume 8223, 82232W (2012) https://doi.org/10.1117/12.907714

KEYWORDS: Photoacoustic spectroscopy, Pulsed laser operation, Image resolution, Solid state lasers, Image quality, Modulation transfer functions, Nd:YAG lasers, Absorption, Signal detection, Photoacoustic imaging

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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 | 19 February 2011 Paper

Effect of the illumination method on photo-acoustic image quality with array transducer based system

Kazuhiro Tsujita, Miya Ishihara, Takeshi Hirasawa, Kaku Irisawa, Kazuhiro Hirota, Yoshiaki Satoh, Makoto Kikuchi

Proceedings Volume 7899, 78992W (2011) https://doi.org/10.1117/12.874352

KEYWORDS: Ultrasonography, Image quality, Transducers, Signal attenuation, Imaging arrays, Imaging systems, Modulation transfer functions, Image resolution, Monte Carlo methods, Fiber lasers

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Proceedings Article | 26 February 2010 Paper

Multicolor photoacoustic imaging by a single transducer with piezoelectric copolymer film in a wide frequency range

Tsutomu Ohmori, Miya Ishihara, Kazuhiro Tsujita, Isao Bansaku, Makoto Kikuchi

Proceedings Volume 7564, 75642V (2010) https://doi.org/10.1117/12.841948

KEYWORDS: Transducers, Acquisition tracking and pointing, Ferroelectric materials, Photoacoustic spectroscopy, Absorption, Molecules, Imaging systems, Tissues, Tunable lasers, Optical imaging

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Showing 5 of 9 publications

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