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Effective reconstruction of high quality CT images

Research Project

Project/Area Number 17H01816
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Life / Health / Medical informatics
Research InstitutionKagawa University

Principal Investigator

Horikawa Yo  香川大学, 創造工学部, 教授 (60181533)

Co-Investigator(Kenkyū-buntansha) 丹治 裕一  香川大学, 創造工学部, 教授 (10306988)
北島 博之  香川大学, 創造工学部, 教授 (90314905)
藤本 憲市  香川大学, 創造工学部, 准教授 (20300626)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2017: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
Keywords機械学習 / 超高速情報処理 / 画像、文書、音声等認識 / 数理工学 / 画像、文章、音声等認識
Outline of Final Research Achievements

Conjugate gradient methods, which are numerical methods for solving a set of linear equations simultaneously, are presented for CT image reconstruction under low X-ray dose. In this study, the CT image reconstruction is defined as a large-scale convex optimization problem with nonnegative or box constraint and we propose some efficient methods for solving these problems. Consequently, we show that the proposed methods provide higher quality reconstruction images than those obtained by the continuous method and are several hundred times faster than the continuous method. Further, we improve the continuous method by accelerating with multi-GPUs and using the prediction with deep Neural networks.

Academic Significance and Societal Importance of the Research Achievements

日本は世界一のCT普及国であると同時に世界一の医療被曝国と言われている。これは,国内メーカが開発しているCT装置では逆投影法が用いられ,この方法では高品質な画像を得るために,人体に高線量照射しなければならないためである。逆投影法による再構成画像よりも高品質で低線量照射下での画像再構成が可能である方法として連続法が提案されている。しかしながら,演算効率が極めて悪いことが問題であった。本研究では,連続法と同じ基本概念に基づきながら,高品質かつ高速なCT画像再構成が可能である数値解析手法の提案を行った。これは,実用に向けた有力な一歩であり,ひいては,多くの人の健康に寄与することになる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (38 results)

All 2020 2019 2018 2017 Other

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 3 results) Presentation (29 results) (of which Int'l Joint Research: 17 results) Remarks (1 results)

  • [Journal Article] Pulsus alternans in a crustacean cardiac model2020

    • Author(s)
      Kitajima Hiroyuki、Fujimoto Ken’ichi、Yazawa Toru
    • Journal Title

      Physica D: Nonlinear Phenomena

      Volume: 402 Pages: 132253-132253

    • DOI

      10.1016/j.physd.2019.132253

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reconstruction of CT Images Using Iterative Least-Squares Methods with Nonnegative Constraint2019

    • Author(s)
      Kohno Hiromasa、Tanji Yuichi、Fujimoto Ken'ichi、Kitajima Hiroyuki、Horikawa Yo、Takahashi Norikazu
    • Journal Title

      Journal of Signal Processing

      Volume: 23 Issue: 2 Pages: 41-48

    • DOI

      10.2299/jsp.23.41

    • NAID

      130007613300

    • ISSN
      1342-6230, 1880-1013
    • Year and Date
      2019-03-15
    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Quasiperiodicity and Chaos Through Hopf?Hopf Bifurcation in Minimal Ring Neural Oscillators Due to a Single Shortcut2019

    • Author(s)
      Horikawa Yo、Kitajima Hiroyuki、Matsushita Haruna
    • Journal Title

      International Journal of Bifurcation and Chaos

      Volume: 29 Issue: 05 Pages: 1950065-1950065

    • DOI

      10.1142/s0218127419500652

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Flip-Flip Bifurcation in a Mathematical Cardiac System2019

    • Author(s)
      Kitajima Hiroyuki、Yazawa Toru
    • Journal Title

      International Journal of Bifurcation and Chaos

      Volume: 29 Issue: 04 Pages: 1950045-1950045

    • DOI

      10.1142/s0218127419500457

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quasiperiodicity and chaos through the Hopf-pitchfork bifurcation in minimal ring neural oscillators due to a single shortcut2019

    • Author(s)
      Horikawa Yo、Kitajima Hiroyuki、Matsushita Haruna
    • Journal Title

      International Journal of Bifurcation and Chaos

      Volume: 29 Pages: 1950065-1950065

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Flip-flip bifurcation in a mathematical cardiac system2019

    • Author(s)
      H. Kitajima and T. Yazawa
    • Journal Title

      International Journal of Bifurcation and Chaos

      Volume: 29 Pages: 1950000-1950000

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fold-Pitchfork Bifurcation, Arnold Tongues and Multiple Chaotic Attractors in a Minimal Network of Three Sigmoidal Neurons2018

    • Author(s)
      Horikawa Yo、Kitajima Hiroyuki、Matsushita Haruna
    • Journal Title

      International Journal of Bifurcation and Chaos

      Volume: 28 Issue: 10 Pages: 1850123-1850123

    • DOI

      10.1142/s0218127418501237

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of nonlinear analysis tools on FPGA2017

    • Author(s)
      S. Shimada and H. Kitajima
    • Journal Title

      Nonlinear Theory and Its Applications, IEICE

      Volume: 8 Issue: 2 Pages: 173-179

    • DOI

      10.1587/nolta.8.173

    • NAID

      130005530421

    • ISSN
      2185-4106
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 非線形動力学システムに基づくCT画像再構成における マルチGPUを用いた高速化2020

    • Author(s)
      植村大地,丹治裕一,藤本憲市,北島博之,堀川 洋
    • Organizer
      電子情報通信学会非線形問題研究会(発表予定)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Dynamical systems analysis of learning process in neural networks2020

    • Author(s)
      S. Wada T. Ryugou and H. Kitajima
    • Organizer
      Proc. NCSP'20, pp.401-404, Honolulu, USA, March 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reconstruction of CT Images by Iterative Least Squares Methods with Nonnegative Constraint2019

    • Author(s)
      H. Kohno, Y. Tanji, K. Fujimoto, H. Kitajima, Y. Horikawa, and N. Takahashi
    • Organizer
      2018 International Symposium on Nonlinear Theory and its Applications(
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fast Computation of Dynamical System for Emission Computed Tomography2019

    • Author(s)
      Ken’ichi Fujimoto, Yuichi Tanji, Hiroyuki Kitajima, and Yo Horikawa
    • Organizer
      The 2nd International Conference on Numerical Modelling in Engineering
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Application of CGNR and CGNE for CT Image Reconstruction2019

    • Author(s)
      K. Matsuoka,Y. Tanji, K. Fujimoto, H. Kitajima
    • Organizer
      2019年 電子情報通信学会 NOLTAソサイエティ大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 共役勾配法を用いたCT画像再構成のGPU上への実装2019

    • Author(s)
      松岡和憲,丹治裕一,藤本憲市,北島博之,堀川 洋
    • Organizer
      電子情報通信学会非線形問題研究会, NLP2019-35
    • Related Report
      2019 Annual Research Report
  • [Presentation] CT画像再構成における射影勾配法と境界拘束共役勾配法の性能比較2019

    • Author(s)
      松岡和憲,丹治裕一,藤本憲市,北島博之,堀川 洋
    • Organizer
      電子情報通信学会非線形問題研究会, NLP2019-106, 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 放射型CTにおけるML-EMアルゴリズムの高速化2019

    • Author(s)
      藤本 憲市, 丹治 裕一, 北島 博之, 堀川 洋
    • Organizer
      2019年 電子情報通信学会 NOLTAソサイエティ大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Heteroclinic Orbits and Chaos in A Ring of Three Unidirectionally Coupled Nonmonotonic Neurons2019

    • Author(s)
      Y. Horikawa, K. Fujimoto
    • Organizer
      2019 International Joint Conference on Neural Networks (IJCNN 2019)
    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bifurcations related to transient EAD in a mathematical cardiac model2019

    • Author(s)
      Y. Ito, H. Kitajima and T. Yazawa
    • Organizer
      NCSP 2019
    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Generation mechanism of transient EAD in a mathematical ventricular model2019

    • Author(s)
      Y. Ito, H. Kitajima and T. Yazawa
    • Organizer
      FAOPS 2019
    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Alternans in a Mathematical Crustacean Cardiac Model2019

    • Author(s)
      H. Kitajima and T. Yazawa
    • Organizer
      FAOPS 2019
    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reconstruction of CT Images by Iterative Least Squares Methods with Nonnegative Constraint2019

    • Author(s)
      H. Kohno, Y. Tanji, K. Fujimoto, H. Kitajima, Y. Horikawa, and N. Takahashi
    • Organizer
      2018 International Symposium on Nonlinear Theory and its Applications
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Discrete-time image-reconstruction system with total variation regularization for computed tomography2018

    • Author(s)
      Ken'ichi Fujimoto
    • Organizer
      2018 World Congress on Medical Physics and Biomedical Engineering (WC2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Hopf-Hopf Bifurcation and Chaos in A Ring Neural Oscillator due to A Single Shortcut2018

    • Author(s)
      Horikawa Yo、Fujimoto Kenrichi、Matsushita Haruna
    • Organizer
      2018 International Joint Conference on Neural Networks (IJCNN 2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 非負値拘束を有する反復最小2乗法によるCT画像の再構成2018

    • Author(s)
      河野紘正, 丹治裕一, 藤本憲市, 北島博之, 堀川洋, 高橋規一
    • Organizer
      電子情報通信学会 非線形問題研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Comparison of CT Image Reconstructions Using Nonnegative Matrix Factorizations2018

    • Author(s)
      H. Kohno, Y. Tanji, K. Fujimoto, H. Kitajima, Y. Horikawa
    • Organizer
      IEEE CASS Shanghai and Shikoku Chapters Joint Workshop on Circuits and Systems (SSJW'18)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparison of CGNE and CGNR for CT Image Reconstruction2018

    • Author(s)
      K. Matsuoka, H. Kohno, Y. Tanji, K. Fujimoto, H. Kitajima and Y. Horikawa
    • Organizer
      IEEE CASS Shanghai and Shikoku Chapters Joint Workshop on Circuits and Systems (SSJW'18)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nonnegative Constrained CGNR and CGNE Methods for CT Image Reconstruction2018

    • Author(s)
      K. Matsuoka, Y. Tanji, K. Fujimoto, H. Kitajima, and Y. Horikawa
    • Organizer
      IEEE Workshop on Nonlinear Circuit Networks
    • Related Report
      2018 Annual Research Report
  • [Presentation] 深層ニューラルネットワークの応用事例-CT画像再構成ほか2018

    • Author(s)
      藤本 憲市
    • Organizer
      医療放射線技術研究会「機械学習・AI・ディープラーニング研究の多様性と医用への応用」
    • Related Report
      2018 Annual Research Report
  • [Presentation] 動的CT画像再構成システムの初期値生成のための深層ニューラルネットワークの構築2018

    • Author(s)
      藤本 憲市,丹治 裕一,北島 博之,堀川 洋
    • Organizer
      電子情報通信学会 非線形問題研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Hopf-Hopf Bifurcation and Chaos in A Ring Neural Oscillator due to A Single Shortcut2018

    • Author(s)
      Y. Horikawa, K. Fujimoto, H. Matsushita
    • Organizer
      2018 International Joint Conference on Neural Networks
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Discrete-time image-reconstruction system with total variation regularization for computed tomography2018

    • Author(s)
      K. Fujimoto
    • Organizer
      World Congress on Medical Physics and Biomedical Engineering
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 非線形ダイナミクスを用いた高精度CT画像の再生法の改良2017

    • Author(s)
      河野紘正,丹治裕一,藤本憲市
    • Organizer
      電子情報通信学会非線形問題研究会
    • Related Report
      2017 Annual Research Report
  • [Presentation] ADI法を用いた高精度CT画像の再生2017

    • Author(s)
      河野紘正,丹治裕一,藤本憲市
    • Organizer
      電子情報通信学会NOLTAソサエティ大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Image Reconstruction for Computed Tomography by Nonnegative Matrix Factorization2017

    • Author(s)
      H. Kohno, Y. Tanji, K. Fujimoto, and N. Takahashi
    • Organizer
      2017 Taiwan and Japan Conference on Circuits and Systems
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 非負値行列因子分解を用いたCT画像の再構成2017

    • Author(s)
      河野紘正,丹治裕一,藤本憲市,高橋 規一
    • Organizer
      電子情報通信学会非線形問題研究会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Improvement of High-Accuracy CT Image Reconstruction Using Nonlinear Dynamics2017

    • Author(s)
      H. Kohno, Y. Tanji, K. Fujimoto
    • Organizer
      2017 International Symposium on Nonlinear Theory and its Applications
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A chaotic ring neural oscillator of three nonmonotonic neurons2017

    • Author(s)
      Y. Horikawa
    • Organizer
      2017 International Joint Conference on Neural Networks
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Remarks] CT画像再構成の高速化

    • URL

      http://chaos.eng.kagawa-u.ac.jp/nonline/research.html

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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