Dr. Fukai Toyofuku Profile

Dr. Fukai Toyofuku

at Kyushu Univ

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Author

Publications (15)

SPIE Journal Paper | 1 November 2012

Influence of readout process on presampled modulation transfer function in computed radiography system

Yasuyuki Kawaji, Fukai Toyofuku, Tadamitsu Ideguchi, Yoshiharu Higashida

OE, Vol. 51, Issue 11, 113202, (November 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.11.113202

KEYWORDS: Modulation transfer functions, Optical filters, Chromium, Computing systems, Nonlinear filtering, Optical simulations, Radiography, Convolution, Image filtering, Imaging systems

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Proceedings Article | 3 March 2012 Paper

Simulation of presampled MTF measurements in computed radiography for different scan directions

Yasuyuki Kawaji, Fukai Toyofuku

Proceedings Volume 8313, 83135P (2012) https://doi.org/10.1117/12.911138

KEYWORDS: Modulation transfer functions, Optical filters, Chromium, Computer simulations, Radiography, Nonlinear filtering, Convolution, Luminescence, Analog electronics, Digital filtering

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Proceedings Article | 16 February 2012 Paper

Computer-assisted radiation treatment planning system for determination of beam directions based on similar cases in a database for stereotactic body radiotherapy

Taiki Magome, Hidetaka Arimura, Yoshiyuki Shioyama, Asumi Mizoguchi, Chiaki Tokunaga, Katsumasa Nakamura, Hiroshi Honda, Masafumi Ohki, Fukai Toyofuku, Hideki Hirata

Proceedings Volume 8319, 83190O (2012) https://doi.org/10.1117/12.911139

KEYWORDS: Databases, Radiotherapy, Lung, Spinal cord, Tissues, Tumors, Lung cancer, Computing systems, Darmstadtium, Health sciences

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Similar treatment plans or similar cases in radiotherapy treatment planning (RTP) databases of senior experienced planners could be helpful or educational for treatment planners who have few experiences of stereotactic body radiotherapy (SBRT). The aim of this study was to investigate the feasibility of beam arrangements determined using similar cases in a RTP database including plans designed by experienced treatment planners. Similar cases were automatically selected based on geometrical features and planning evaluation indices from 81 cases with lung cancer who received SBRT. First, the RTP database was searched for the five most similar cases based on geometrical features related to the location, size, and shape of the planning target volume, lung, and spinal cord. Second, the five beam arrangements of an objective case were automatically determined by registering five similar cases to the objective case with respect to lung regions by means of a linear registration technique. For evaluation of the beam arrangements, five plans were designed by applying the beam arrangements determined in the second step to the objective case. The most usable beam arrangement was selected by sorting the five plans based on 11 planning evaluation indices including tumor control probability and normal tissue complication probability. We applied the proposed two-step method to 10 test cases by using an RTP database of 81 cases with lung cancer, and compared the 11 planning evaluation indices between the original plan and the corresponding most usable similar-case-based plan. As a result, there were no statistically significant differences between the original beam arrangements and the most usable similar-case-based beam arrangements (P > 0.05) in terms of the 10 planning evaluation indices. The proposed method suggested usable beam arrangements with little difference from cases in the RTP database, and thus it could be employed as an educational tool for less experienced treatment planners.

Proceedings Article | 9 March 2010 Paper

Computerized evaluation method of white matter hyperintensities related to subcortical vascular dementia in brain MR images

Hidetaka Arimura, Yasuo Kawata, Yasuo Yamashita, Taiki Magome, Masafumi Ohki, Fukai Toyofuku, Yoshiharu Higashida, Kazuhiro Tsuchiya

Proceedings Volume 7624, 762424 (2010) https://doi.org/10.1117/12.845229

KEYWORDS: Image segmentation, Magnetic resonance imaging, Dementia, Brain, Neuroimaging, Human-machine interfaces, Gold, Software, Magnetism, Diagnostics

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Proceedings Article | 9 March 2010 Paper

Computer-aided classification of patients with dementia of Alzheimer's type based on cerebral blood flow determined with arterial spin labeling technique

Yasuo Yamashita, Hidetaka Arimura, Takashi Yoshiura, Chiaki Tokunaga, Taiki Magome, Akira Monji, Tomoyuki Noguchi, Fukai Toyofuku, Masafumi Oki, Yasuhiko Nakamura, Hiroshi Honda

Proceedings Volume 7624, 76241J (2010) https://doi.org/10.1117/12.845530

KEYWORDS: Magnetic resonance imaging, Brain, Alzheimer's disease, Cerebral blood flow, Neuroimaging, Brain mapping, Dementia, Image registration, Computing systems, Classification systems

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Proceedings Article | 19 March 2008 Paper

Bone mineral imaging using a digital magnification mammography system

Fukai Toyofuku, Kenji Tokumori, Yoshiharu Higashida, Hidetaka Arimura, Junji Morishita, Masafumi Ohki

Proceedings Volume 6913, 691358 (2008) https://doi.org/10.1117/12.770387

KEYWORDS: Bone, Digital mammography, Minerals, Imaging systems, Aluminum, X-rays, X-ray imaging, Sensors, Signal attenuation, Calibration

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Proceedings Article | 17 March 2008 Paper

Computer-aided diagnostic method for classification of Alzheimer's disease with atrophic image features on MR images

Hidetaka Arimura, Takashi Yoshiura, Seiji Kumazawa, Kazuhiro Tanaka, Hiroshi Koga, Futoshi Mihara, Hiroshi Honda, Shuji Sakai, Fukai Toyofuku, Yoshiharu Higashida

Proceedings Volume 6915, 69151P (2008) https://doi.org/10.1117/12.769753

KEYWORDS: Brain, Magnetic resonance imaging, Computer aided diagnosis and therapy, Image segmentation, Alzheimer's disease, 3D image processing, Neuroimaging, Image classification, Medical imaging, Magnetism

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Proceedings Article | 15 March 2006 Paper

Computerized method for automated measurement of thickness of cerebral cortex for 3-D MR images

Hidetaka Arimura, Takashi Yoshiura, Seiji Kumazawa, Hiroshi Koga, Shuji Sakai, Futoshi Mihara, Hiroshi Honda, Masafumi Ohki, Fukai Toyofuku, Yoshiharu Higashida

Proceedings Volume 6144, 61443V (2006) https://doi.org/10.1117/12.652832

KEYWORDS: Image segmentation, Brain, Magnetic resonance imaging, 3D image processing, Head, Cerebral cortex, 3D metrology, Neuroimaging, Image filtering, Alzheimer's disease

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Proceedings Article | 15 March 2006 Paper

White matter fiber tractography based on a directional diffusion field in diffusion tensor MRI

S. Kumazawa, T. Yoshiura, H. Arimura, F. Mihara, H. Honda, Y. Higashida, F. Toyofuku

Proceedings Volume 6144, 61443Y (2006) https://doi.org/10.1117/12.652936

KEYWORDS: Diffusion, Tumors, Brain, Magnetic resonance imaging, 3D modeling, Anisotropy, Visualization, Image segmentation, Diffusion weighted imaging, Spherical lenses

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Proceedings Article | 20 April 2005 Paper

X-ray dark-field imaging and potential of its clinical application

Daisuke Shimao, Hiroshi Sugiyama, Toshiyuki Kunisada, Anton Maksimenko, Fukai Toyofuku, Ei Ueno, Katsuhito Yamasaki, Chiho Obayashi, Kazuyuki Hyodo, Gang Li, Lin Pan, Xiaoming Jiang, Masami Ando

Proceedings Volume 5745, (2005) https://doi.org/10.1117/12.595021

KEYWORDS: X-rays, X-ray imaging, Cartilage, Absorption, Diffraction, Tissues, Breast cancer, X-ray diffraction, Refractive index, Reflectivity

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Proceedings Article | 6 October 1999 Paper

Proposal for medical application beamlines of the SPring-8

Chikao Uyama, Kenji Tokumori, Fukai Toyofuku, Hiroshi Sugiyama, Kazuyuki Hyodo, Masami Ando, Katsuyuki Nishimura, Tohoru Takeda, Katsuhito Yamasaki, Masao Matsumoto

Proceedings Volume 3770, (1999) https://doi.org/10.1117/12.368181

KEYWORDS: X-rays, X-ray imaging, Light sources, X-ray computed tomography, Monochromators, Angiography, X-ray detectors, X-ray sources, Biomedical optics, Brain-machine interfaces

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Proceedings Article | 6 October 1999 Paper

Development of the photon-counting 256ch CdTe line detector

Kenji Tokumori, Fukai Toyofuku, Shigenobu Kanda, Sueki Baba, Yoshio Mito, Kazuyuki Hyodo, Masami Ando, Chikao Uyama

Proceedings Volume 3770, (1999) https://doi.org/10.1117/12.368180

KEYWORDS: Sensors, X-rays, X-ray detectors, Synchrotron radiation, X-ray sources, X-ray computed tomography, X-ray imaging, Calibration, Detector development, Detector arrays

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Proceedings Article | 6 October 1999 Paper

Fan-beam monochromatic x-ray CT using fluorescent x rays excited by synchrotron radiation

Fukai Toyofuku, Kenji Tokumori, Shigenobu Kanda, Yoshiharu Higashida, Masafumi Ohki, Tetsuji Cho, Katsuyuki Nishimura, Kazuyuki Hyodo, Masami Ando, Chikao Uyama

Proceedings Volume 3770, (1999) https://doi.org/10.1117/12.368188

KEYWORDS: X-rays, X-ray computed tomography, Sensors, X-ray imaging, Synchrotron radiation, Detector arrays, Absorption, Iodine, X-ray sources, Holmium

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SPIE Journal Paper | 1 August 1998

Three-dimensional monochromatic x-ray computed tomography using synchrotron radiation

Tsuneo Saito, Hiroyuki Kudo, Tohoru Takeda, Yuji Itai, Kenji Tokumori, Fukai Toyofuku, Kazuyuki Hyodo, Masami Ando, Katsuyuki Nishimura, Chikao Uyama

OE, Vol. 37, Issue 08, (August 1998) https://doi.org/10.1117/12.10.1117/1.601745

KEYWORDS: X-ray computed tomography, X-rays, Reconstruction algorithms, 3D image processing, X-ray sources, Barium, Synchrotron radiation, Algorithm development, X-ray imaging, Radon transform

Proceedings Article | 22 August 1995 Paper

Three-dimensional monochromatic x-ray CT

Tsuneo Saito, Hiroyuki Kudo, Tohoru Takeda, Yuji Itai, Kenji Tokumori, Fukai Toyofuku, Kazuyuki Hyodo, Masami Ando, Ktsuyuki Nishimura, Chikao Uyama

Proceedings Volume 2564, (1995) https://doi.org/10.1117/12.217441

KEYWORDS: X-ray computed tomography, 3D image processing, Reconstruction algorithms, X-rays, 3D image reconstruction, X-ray sources, X-ray imaging, Synchrotron radiation, Algorithm development, 3D acquisition

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Showing 5 of 15 publications

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