Dr. Hideaki Hiro-Oka Profile

Dr. Hideaki Hiro-Oka

Associate Professor at Kitasato Univ

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 14 February 2012 Paper

Paper

Image diversity, shape modification with accommodation, dynamical change with accommodation, and age dependence of the ciliary body imaged by optical coherence tomography

Kimiya Shimizu, Nobuyuki Satou, Akihito Igarashi, Motoi Nakanishi, Atsushi Goto, Donghak Choi, Reiko Yoshimura, Hideaki Hiro-Oka, Hiroyuki Furukawa, Kohji Ohbayashi

Proceedings Volume 8209, 820909 (2012) https://doi.org/10.1117/12.905401

KEYWORDS: Optical coherence tomography, Eye, Image segmentation, Iris, 3D image processing, Video, Sclera, Ultrafast phenomena, Imaging systems, Refraction

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Proceedings Article | 30 January 2012 Paper

Paper

Optical amplification of the signal and sensitivity of the ultrafast spectral domain optical coherence tomography at an A-scan rate of 10MHz in a wavelength region of 1300nm

D. Choi, H. Hiro-oka, K. Shimizu, K. Ohbayashi

Proceedings Volume 8213, 82131F (2012) https://doi.org/10.1117/12.906536

KEYWORDS: Optical coherence tomography, Point spread functions, Field programmable gate arrays, Data processing, Skin, 3D image processing, Data acquisition, Biomedical optics, Ultrafast phenomena, Semiconductor optical amplifiers

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Proceedings Article | 30 January 2012 Paper

Paper

Detailed software design of an ultra-parallel ultra-high speed SD-OCT for real-time 4D display at 12 volume/second

H. Hiro-Oka, D. Choi, K. Shimizu, K. Ohbayashi

Proceedings Volume 8213, 821339 (2012) https://doi.org/10.1117/12.906948

KEYWORDS: Optical coherence tomography, Field programmable gate arrays, Data acquisition, Data processing, 3D image processing, 3D displays, Demultiplexers, Interfaces, Graphics processing units, 3D acquisition

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Proceedings Article | 30 January 2012 Paper

Paper

Discretely swept optical coherence tomography system using super-structure grating distributed Bragg reflector lasers at 1561-1639nm

D. Choi, R. Yoshimura, H. Hiro-Oka, H. Furukawa, A. Goto, N. Satoh, A. Igarashi, M. Nakanishi, K. Shimizu, K. Ohbayashi

Proceedings Volume 8213, 82132F (2012) https://doi.org/10.1117/12.905413

KEYWORDS: Optical coherence tomography, Point spread functions, Interference (communication), Tissue optics, Distributed Bragg reflectors, Frequency combs, Laser systems engineering, Image segmentation, Biomedical optics, Laser optics

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Proceedings Article | 12 February 2011 Paper

Paper

Ultra-high speed real-time 4D display system installed in ultra-high-speed parallel OCT system at a volume rate of 12 volumes/sec

K. Ohbayashi, D. Choi, H. Hiro-oka, A. Kubota, T. Ohno, R. Ikeda, K. Shimizu

Proceedings Volume 7889, 78891Z (2011) https://doi.org/10.1117/12.874576

KEYWORDS: Optical coherence tomography, Data acquisition, 3D displays, 3D image processing, Video, Tissues, Biopsy, Data processing, Diagnostics, Field programmable gate arrays

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Proceedings Article | 12 February 2011 Paper

Paper

Full-range imaging of the whole anterior segment of eye by high-speed optical frequency domain imaging using a reflective Fabry-Perot tunable laser

Hiroyuki Furukawa, Hideaki Hiro-Oka, Reiko Yoshimura, Dong-Hak Choi, Motoi Nakanishi, Akihito Igarashi, Kohji Ohbayashi, Kimiya Shimizu

Proceedings Volume 7885, 78850V (2011) https://doi.org/10.1117/12.874077

KEYWORDS: Image segmentation, Eye, Optical imaging, Cornea, Crystals, Imaging systems, Reflectivity, Fabry–Perot interferometers, Tunable lasers, Iris

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Proceedings Article | 18 February 2009 Paper

Paper

24 mm depth range discretely swept optical frequency domain imaging in dentistry

Hideo Kakuma, DongHak Choi, Hiroyuki Furukawa, Hideaki Hiro-Oka, Kohji Ohbayashi

Proceedings Volume 7162, 716208 (2009) https://doi.org/10.1117/12.807235

KEYWORDS: Optical coherence tomography, Point spread functions, Laser dentistry, Reflectors, Imaging systems, Optical imaging, Teeth, Light sources, Dentistry, Reflectometry

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Proceedings Article | 5 March 2008 Paper

Paper

Doppler optical coherence tomography measurements in discretely swept optical frequency domain imaging

Reiko Yoshimura, Hideaki Hiro-Oka, DongHak Choi, Hiroyuki Furukawa, Naoki Fujiwara, Kohji Ohbayashi

Proceedings Volume 6847, 68472G (2008) https://doi.org/10.1117/12.764331

KEYWORDS: Optical coherence tomography, Doppler tomography, Light sources, Imaging systems, Optical imaging, Doppler effect, Optical testing, Biomedical optics, Photonics, Phase shifts

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Proceedings Article | 18 February 2008 Paper

Paper

60 MHz A-line rate ultra-high speed Fourier-domain optical coherence tomography

K. Ohbayashi, D. Choi, H. Hiro-Oka, H. Furukawa, R. Yoshimura, M. Nakanishi, K. Shimizu

Proceedings Volume 6847, 68470M (2008) https://doi.org/10.1117/12.764133

KEYWORDS: Optical coherence tomography, Data acquisition, Demultiplexers, Scanners, 3D image processing, Mirrors, Point spread functions, Terahertz radiation, Imaging systems, Electronics

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Proceedings Article | 18 February 2008 Paper

Paper

Use of cosine tapered window to improve dynamic range of OCT without loss of resolution

Hideaki Hiro-Oka, DongHak Choi, Hiroyuki Furukawa, Reiko Yoshimura, Kohji Ohbayashi, Takeyuki Wakabayashi

Proceedings Volume 6847, 68472C (2008) https://doi.org/10.1117/12.761459

KEYWORDS: Optical coherence tomography, Tunable lasers, Light sources, Mirrors, Fourier transforms, L band, Skin, Optical imaging, Laser development, Signal detection

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Proceedings Article | 18 February 2008 Paper

Paper

Penetration depth of optical frequency domain imaging at wavelengths of 1310 nm and 1550 nm

Hiroyuki Furukawa, DongHak Choi, Hideaki Hiro-Oka, Reiko Yoshimura, Motoi Nakanishi, Kimiya Shimizu, Kohji Ohbayashi

Proceedings Volume 6847, 68472V (2008) https://doi.org/10.1117/12.766846

KEYWORDS: Tissue optics, Biomedical optics, Hard tissue optics, Optical imaging, Optical coherence tomography, Coherence (optics), Laser scanners, 3D scanning, Receivers, Mirrors

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Proceedings Article | 7 February 2007 Paper

Paper

Discretely swept optical-frequency domain imaging toward high-resolution, high-speed, high-sensitivity, and long-depth-range

K. Ohbayashi, T. Amano, H. Hiro-oka, H. Furukawa, D. Choi, P. Jayavel, R. Yoshimura, K. Asaka, N. Fujiwara, H. Ishii, M. Suzuki, M. Nakanishi, K. Shimizu

Proceedings Volume 6429, 64291G (2007) https://doi.org/10.1117/12.703963

KEYWORDS: Optical coherence tomography, Laser development, Image enhancement, In vivo imaging, Semiconductor optical amplifiers, Telecommunications, Prototyping, Switching, Imaging systems, Optical amplifiers

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Proceedings Article | 7 February 2007 Paper

Paper

High-speed optical-frequency domain imaging by one frame imaging within one single frequency sweep

Hiroyuki Furukawa, Takuji Amano, DongHak Choi, Hideaki Hiro-Oka, Kohji Ohbayashi

Proceedings Volume 6429, 64292D (2007) https://doi.org/10.1117/12.704565

KEYWORDS: Optical coherence tomography, Data acquisition, Mirrors, Scanners, Tomography, Data transmission, Optical scanning, In vivo imaging, Biomedical optics, Light sources

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Proceedings Article | 7 February 2007 Paper

Paper

A method of improving scanning speed and resolution of OFDR-OCT using multiple SSG-DBR lasers simultaneously

DongHak Choi, Hideaki Hiro-Oka, Takuji Amano, Hiroyuki Furukawa, Naoki Fujiwara, Hiroyuki Ishii, Kohji Ohbayashi

Proceedings Volume 6429, 64292E (2007) https://doi.org/10.1117/12.704250

KEYWORDS: Optical coherence tomography, Mirrors, Reflectivity, Interferometers, Solids, Pellicles, L band, Data acquisition, Time metrology, Switching

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Proceedings Article | 20 February 2006 Paper

Paper

Reconstruction of three-dimensional structure of an extracted tooth by OFDR-OCT

Hiroyuki Furukawa, Hideaki Hiro-Oka, Takuji Amano, DongHak Choi, Takeo Miyazawa, Ryoko Yoshimura, Kimiya Shimizu, Kohji Ohbayashi

Proceedings Volume 6079, 60790T (2006) https://doi.org/10.1117/12.648802

KEYWORDS: Optical coherence tomography, Teeth, 3D image processing, Refraction, Mirrors, 3D image reconstruction, Cornea, Ray tracing, Eye, Photonics

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Proceedings Article | 13 April 2005 Paper

Paper

Tissue imaging by OFDR-OCT using an SSG-DBR laser

DongHak Choi, Takuji Amano, Hideaki Hiro-Oka, Hiroyuki Furukawa, Takeo Miyazawa, Ryoko Yoshimura, Motoi Nakanishi, Kimiya Shimizu, Kohji Ohbayashi

Proceedings Volume 5690, (2005) https://doi.org/10.1117/12.592544

KEYWORDS: Optical coherence tomography, Signal attenuation, Tissues, Skin, Image segmentation, Blood, Light sources, Teeth, Tissue optics, Laser development

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Proceedings Article | 2 August 2004 Paper

Paper

OFDR with an SSG-DBR laser

Takuji Amano, Hideaki Hiro-Oka, DongHak Choi, Hiroyuki Furukawa, Fumiyoshi Kano, Mitsuo Takeda, Motoi Nakanishi, Kimiya Shimizu, Kohji Obayashi

Proceedings Volume 5531, (2004) https://doi.org/10.1117/12.559120

KEYWORDS: Optical coherence tomography, Teeth, Light sources, Laser dentistry, Refractive index, Mirrors, Interferometry, Bismuth, Telecommunications, Laser development

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Showing 5 of 17 publications

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