Prof. Katsuhiro Ichikawa Profile

Prof. Katsuhiro Ichikawa

Professor at Kanazawa University

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 1 April 2024 Poster + Paper

A challenge for high-speed and high-resolution CT for extremities with clinical feasibility

Hiroki Kawashima, Katsuhiro Ichikawa

Proceedings Volume 12925, 129251W (2024) https://doi.org/10.1117/12.3004919

KEYWORDS: Bone, Modulation transfer functions, X-ray computed tomography, Visualization, Spatial resolution, Sensors, Computed tomography, X-ray detectors, Spatial frequencies, X-rays

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SPIE Journal Paper | 16 December 2020

Performance of clinically available deep learning image reconstruction in computed tomography: a phantom study

Hiroki Kawashima, Katsuhiro Ichikawa, Tadanori Takata, Wataru Mitsui, Hiroshi Ueta, Norihide Yoneda, Satoshi Kobayashi

JMI, Vol. 7, Issue 06, 063503, (December 2020) https://doi.org/10.1117/12.10.1117/1.JMI.7.6.063503

KEYWORDS: Computed tomography, Image restoration, Infrared imaging, Tissues, Denoising, Image resolution, Image quality, Image processing, CT reconstruction, Visibility

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Proceedings Article | 9 March 2018 Paper

A novel reconstruction algorithm for arm-artifact reduction in computed tomography

Hiroki Kawashima, Katsuhiro Ichikawa, Tadanori Takata, Kosuke Matsubara, Satoshi Kobayashi

Proceedings Volume 10573, 105733B (2018) https://doi.org/10.1117/12.2293248

KEYWORDS: Reconstruction algorithms, Computed tomography, Image filtering, Algorithm development, Nonlinear filtering, Image quality, Abdomen, X-ray computed tomography

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Proceedings Article | 30 March 2016 Paper

Dual-energy computed tomography of the head: a phantom study assessing axial dose distribution, eye lens dose, and image noise level

Kosuke Matsubara, Hiroki Kawashima, Takashi Hamaguchi, Tadanori Takata, Masanao Kobayashi, Katsuhiro Ichikawa, Kichiro Koshida

Proceedings Volume 9783, 978347 (2016) https://doi.org/10.1117/12.2216650

KEYWORDS: Computed tomography, Head, Eye, Signal attenuation, Glasses, Composites, Radiation dosimetry, Cones, Calibration, X-ray computed tomography, X-rays, Angiography, Scanners

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Proceedings Article | 3 March 2012 Paper

Noise simulation system for determining imaging conditions in digital radiography

R. Tanaka, K. Ichikawa, K. Matsubara, H. Kawashima

Proceedings Volume 8313, 83135Q (2012) https://doi.org/10.1117/12.909838

KEYWORDS: Sensors, Imaging systems, Image quality, Digital imaging, Computer simulations, X-rays, Visualization, Signal detection, Radiography, Prototyping

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Proceedings Article | 3 March 2012 Paper

Investigation of temporal resolution required for CT coronary angiography

Kazuya Ohashi, Katsuhiro Ichikawa, Tatsuya Kawai, Yuta Shibamoto

Proceedings Volume 8313, 83132H (2012) https://doi.org/10.1117/12.910467

KEYWORDS: Computed tomography, Beam propagation method, Image quality, Heart, Angiography, Temporal resolution, Arteries, Modulation transfer functions, Visualization, Sensors

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Proceedings Article | 22 February 2012 Paper

Theoretical demonstration of image characteristics and image formation process depending on image displaying conditions on liquid crystal display

Asumi Yamazaki, Katsuhiro Ichikawa, Masao Funahashi, Yoshie Kodera

Proceedings Volume 8318, 83181R (2012) https://doi.org/10.1117/12.910702

KEYWORDS: Modulation transfer functions, LCDs, Image processing, Digital imaging, Medical imaging, Image analysis, X-ray imaging, X-rays, Digital image processing, Image acquisition

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Proceedings Article | 15 March 2011 Paper

Development of an automated processing method to detect still timing of cardiac motion for coronary magnetic resonance angiography

Hiroya Asou, Katsuhiro Ichikawa, Naoyuki Imada, Takanori Masuda, Tomoyasu Satou

Proceedings Volume 7962, 79624E (2011) https://doi.org/10.1117/12.877743

KEYWORDS: Image processing, Image quality, Arteries, Magnetic resonance imaging, Visualization, Magnetic resonance angiography, Image filtering, Imaging systems, Linear filtering, Digital image processing

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Proceedings Article | 23 March 2010 Paper

Temporal-spatial characteristic evaluation in a dynamic flat-panel detector system

H. Kawashima, R. Tanaka, K. Matsubara, K. Ichikawa, K. Sakuta, S. Minami, N. Hayashi, S. Sanada, M. Kawamura, T. Yamamoto

Proceedings Volume 7622, 76224T (2010) https://doi.org/10.1117/12.844603

KEYWORDS: X-rays, X-ray imaging, Sensors, Radiography, X-ray detectors, Dynamical systems, Chest, Ionization, Functional imaging, X-ray technology

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Proceedings Article | 4 March 2010 Paper

Effects of image lag on real-time target tracking in radiotherapy

Rie Tanaka, Katsuhiro Ichikawa, Shinichiro Mori, Suguru Dobashi, Motoki Kumagaya, Hiroki Kawashima, Shinichi Morita, Shigeru Sanada

Proceedings Volume 7622, 76224S (2010) https://doi.org/10.1117/12.844202

KEYWORDS: Radiotherapy, Modulation transfer functions, Sensors, X-rays, X-ray imaging, Tungsten, Lung, Tumors, Imaging systems, Image quality

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Proceedings Article | 14 March 2009 Paper

A simple method for evaluating image quality of screen-film system using a high-performance digital camera

Naotoshi Fujita, Asumi Yamazaki, Katsuhiro Ichikawa, Yoshie Kodera

Proceedings Volume 7258, 72584Z (2009) https://doi.org/10.1117/12.811490

KEYWORDS: Modulation transfer functions, Digital cameras, Imaging systems, Image quality, LCDs, Fourier transforms, Digital imaging, Spatial frequencies, Quality systems, X-rays

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Proceedings Article | 19 March 2008 Paper

Analysis of in-plane signal-to-noise ratio in computed tomography

Takanori Hara, Katsuhiro Ichikawa, Shigeru Sanada, Yoshihiro Ida

Proceedings Volume 6913, 691353 (2008) https://doi.org/10.1117/12.768968

KEYWORDS: Signal to noise ratio, Modulation transfer functions, X-ray computed tomography, Computed tomography, Spatial frequencies, Visualization, Sensors, Visibility, Radiography, Image quality

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Proceedings Article | 18 March 2008 Paper

Comparison of MTFs in x-ray CT images between measured by current method and considered linearity in low contrast

Naotoshi Fujita, Katsuhiro Ichikawa, Takanori Hara, Yoshie Kodera

Proceedings Volume 6913, 69133O (2008) https://doi.org/10.1117/12.770112

KEYWORDS: Modulation transfer functions, X-ray computed tomography, Copper, Computed tomography, X-rays, Scanners, Signal to noise ratio, X-ray imaging, Spatial resolution, Signal attenuation

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Proceedings Article | 11 March 2008 Paper

Development of adaptive noise reduction filter algorithm for pediatric body images in a multi-detector CT

Eiji Nishimaru, Katsuhiro Ichikawa, Izumi Okita, Yuuji Ninomiya, Yukihiro Tomoshige, Takehiro Kurokawa, Yutaka Ono, Yuko Nakamura, Masayuki Suzuki

Proceedings Volume 6914, 691421 (2008) https://doi.org/10.1117/12.769739

KEYWORDS: Image filtering, Computed tomography, Image processing, Algorithm development, Digital filtering, Spatial resolution, Denoising, Detection and tracking algorithms, Optical filters, X-ray computed tomography

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Proceedings Article | 6 March 2008 Paper

Noise reduction effect in super-high resolution LCDs using independent sub-pixel driving technology

Katsuhiro Ichikawa, Yoshikazu Nishi, Shigeo Hayashi, Mikio Hasegawa, Yoshie Kodera

Proceedings Volume 6917, 69171F (2008) https://doi.org/10.1117/12.770848

KEYWORDS: LCDs, Denoising, Resolution enhancement technologies, Image resolution, Mammography, Spatial frequencies, Chromium, Optical resolution, Bone, X-ray imaging

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Proceedings Article | 21 March 2007 Paper

Development of a new resolution enhancement technology for medical liquid crystal displays

Katsuhiro Ichikawa, Yoshie Kodera, Yoshikazu Nishi, Sigeo Hayashi, Mikio Hasegawa

Proceedings Volume 6516, 65160W (2007) https://doi.org/10.1117/12.708899

KEYWORDS: LCDs, Resolution enhancement technologies, Image resolution, Modulation transfer functions, Image enhancement, Data processing, Mammography, Digital imaging, Chromium

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Proceedings Article | 15 March 2007 Paper

Evaluation of physical image characteristics of phase contrast mammography

Asumi Yamazaki, Katushiro Ichikawa, Yoshie Kodera

Proceedings Volume 6510, 65103A (2007) https://doi.org/10.1117/12.708458

KEYWORDS: Mammography, Modulation transfer functions, Chromium, Refraction, Image enhancement, Sensors, Phase contrast, Image sensors, Radiography, X-rays

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Proceedings Article | 10 March 2006 Paper

Measurement of MTFs for monochrome and color liquid crystal displays

Akiko Horii, Miho Takamura, Katsuhiro Ichikawa, Yoshie Kodera, Mitsuru Ikeda, Takeo Ishigaki

Proceedings Volume 6141, 61411P (2006) https://doi.org/10.1117/12.651634

KEYWORDS: LCDs, Modulation transfer functions, Digital cameras, CRTs, Manganese, Iterated function systems, Medical imaging, Liquid crystals, Photography, Cameras

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Proceedings Article | 2 March 2006 Paper

Novel NPS measurement method for medical liquid crystal display using periodic components subtraction technique

Katsuhiro Ichikawa, Yoshie Kodera, Akiko Horii

Proceedings Volume 6142, 61423H (2006) https://doi.org/10.1117/12.653424

KEYWORDS: LCDs, Digital imaging, Digital cameras, Error analysis, CCD image sensors, Data processing, Medical imaging, CCD cameras, Charge-coupled devices, Visualization

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Proceedings Article | 30 May 2003 Paper

Novel MTF measurement method for medical image viewers using a bar pattern image

Katsuhiro Ichikawa, Hiroshi Fujita, Takeshi Sawada

Proceedings Volume 5029, (2003) https://doi.org/10.1117/12.480209

KEYWORDS: Modulation transfer functions, Medical imaging, Video, Digital cameras, Human-machine interfaces, Digital imaging, Image resolution, Manganese, CRTs, Data conversion

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Showing 5 of 20 publications

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