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Research Activity

Field of Study

Subject of Study

Book / Paper

Academic Paper (Judged Full Paper):

1. Yusaku Yamaguchi, Kudo Moe, Takeshi Kojima and Tetsuya Yoshinaga :
Convergence Study of Iterative Image Reconstruction Algorithm with Power Exponent for Computed Tomography,
Proc. of NCSP'20, 113-116, 2020.
2. Ryosuke Kasai, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Hybrid Euler method for discretizing continuous-time tomographic dynamical system,
Proc. of NCSP'20, 73-76, 2020.
3. Yusaku Yamaguchi, Moe Kudo, Ryosuke Kasai, Takeshi Kojima and Tetsuya Yoshinaga :
Continuous-time image reconstruction based on Hellinger distance minimization for medical X-ray CT imaging,
Basic & Clinical Pharmacology & Toxicology (Abstracts), Vol.125, No.S5, 30-31, 2019.
4. Ryosuke Kasai, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Hybrid of ML-EM and MART algorithms for X-ray CT image reconstruction,
Basic & Clinical Pharmacology & Toxicology (Abstracts), Vol.125, No.S5, 31-32, 2019.
5. Yusaku Yamaguchi, Moe Kudo, Takeshi Kojima, Omar M. Abou Al-Ola and Tetsuya Yoshinaga :
Extended ordered-subsets expectation-maximization algorithm with power exponent for noise-robust image reconstruction in computed tomography,
Radiation Environment and Medicine, 2019.
(CiNii: 40022011708)
6. Ryosuke Kasai, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Hybrid algorithm of maximum-likelihood expectation-maximization and multiplicative algebraic reconstruction technique for iterative tomographic image reconstruction,
Proceedings Volume 11049, International Workshop on Advanced Image Technology (IWAIT) 2019, No.110491F, 2019.
(DOI: 10.1117/12.2521185,   Elsevier: Scopus)
7. Ryosuke Kasai, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Tomographic image reconstruction based on minimization of symmetrized Kullback-Leibler divergence,
Mathematical Problems in Engineering, Vol.2018, No.Article ID 8973131, 9-pages, 2018.
(Tokushima University Institutional Repository: 114383,   DOI: 10.1155/2018/8973131)
8. Takeshi Kojima, Tetsushi Ueta and Tetsuya Yoshinaga :
Multivalued discrete tomography using dynamical system that describes competition,
Mathematical Problems in Engineering, Vol.2017, No.Article ID 8160354, 9-pages, 2017.
(Tokushima University Institutional Repository: 114381,   DOI: 10.1155/2017/8160354)
9. Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Noise reduction in computed tomography using a multiplicative continuous-time image reconstruction method,
Progress in Biomedical Optics and Imaging - Proceedings of SPIE, Vol.9783, 2016.
(DOI: 10.1117/12.2216439)
10. Kiyoko Tateishi, Yusaku Yamaguchi, Omar M. Abou Al-Ola, Takeshi Kojima and Tetsuya Yoshinaga :
Continuous analog of multiplicative algebraic reconstruction technique for computed tomography,
Progress in Biomedical Optics and Imaging - Proceedings of SPIE, Vol.9783, 2016.
(DOI: 10.1117/12.2214598)

Proceeding of International Conference:

1. Ryosuke Kasai, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Hybrid Euler method for discretizing continuous-time tomographic dynamical system,
Proc. of NCSP'20, 73-76, Honolulu, Feb. 2020.
2. Yusaku Yamaguchi, Kudo Moe, Takeshi Kojima and Tetsuya Yoshinaga :
Convergence Study of Iterative Image Reconstruction Algorithm with Power Exponent for Computed Tomography,
Proc. of NCSP'20, 113-116, Honolulu, Feb. 2020.
3. Yusaku Yamaguchi, Moe Kudoh, Ryosuke Kasai, Takeshi Kojima and Tetsuya Yoshinaga :
Continuous-time image reconstruction based on Hellinger distance minimization for medical X-ray CT imaging,
Abstract Proceeding of the 8th International Conference on Biomedical Engineering and Biotechnology, 30-31, Seoul, Oct. 2019.
4. Ryosuke Kasai, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Hybrid of ML-EM and MART algorithms for X-ray CT image reconstruction,
Abstract Proceeding of the 8th International Conference on Biomedical Engineering and Biotechnology, 31-32, Seoul, Oct. 2019.
5. Ryosuke Kasai, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Hybrid algorithm of maximum-likelihood expectation-maximization and multiplicative algebraic reconstruction technique for iterative tomographic image reconstruction,
Proceedings of SPIE, Vol.11049, Singapore, Jan. 2019.
(DOI: 10.1117/12.2521185,   Elsevier: Scopus)
6. Yusaku Yamaguchi, Michiko Mori, Takeshi Kojima and Tetsuya Yoshinaga :
Nonautonomous Nonlinear Dynamical System for Reconstructing Magnetic Resonance Image,
Proc. of NOLTA 2018, 200-203, Tarragona, Spain, Sep. 2018.
7. Takeshi Kojima, Kiyoko Tateishi, Yusaku Yamaguchi and Tetsuya Yoshinaga :
Discretization of Continuous Analog to Accelerated Expectation-Maximization Algorithm for Computed Tomography,
Proc. of NOLTA 2018, 136-139, Tarragona, Spain, Sep. 2018.
8. Ryosei Nakada, Takeshi Kojima and Tetsuya Yoshinaga :
Nonlinear Dynamical System with Order-Preserving Function for Inverse Problem of Intensity-Modulated Radiation Therapy Treatment Planning,
Proc. of NOLTA 2018, 192-195, Tarragona, Spain, Sep. 2018.
9. Masashi Kimura, Akira Kinokiri, Takeshi Kojima, Yusaku Yamaguchi and Tetsuya Yoshinaga :
Total-Variation Minimization with Regularization for Continuous-Time Dynamical Image Reconstruction in Computed Tomography,
Proc. of NOLTA 2018, 143-146, Tarragona, Spain, Sep. 2018.
10. Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Tomographic Image Reconstruction via Chi-Square Minimization,
Proc. of NCSP'18, 600-603, Honolulu, Mar. 2018.
11. Takeshi Kojima, Tetsushi Ueta and Tetsuya Yoshinaga :
An attempt to enlarge basin in discrete tomographic dynamics with a competitive term,
Proc. of NCSP'18, 604-607, Honolulu, Mar. 2018.
12. Keita Nakahama, Takeshi Kojima and Tetsuya Yoshinaga :
Applying dynamical method of discrete tomography to X-ray CT imaging,
Proceedings of International Forum of Medical Imaging in Asia, 81-84, Okinawa, Jan. 2017.
13. Yusaku Yamaguchi, Omar M. Abou Al-Ola, Shintaro Harano, Takeshi Kojima and Tetsuya Yoshinaga :
Evaluation of metal artifact reduction using dynamical image reconstruction in X-ray CT,
Proceedings of International Forum of Medical Imaging in Asia, 221-224, Okinawa, Jan. 2017.
14. Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Noise reduction in computed tomography using a multiplicative continuous-time image reconstruction method,
Proceedings of SPIE, Vol.9783, San Diego, Feb. 2016.
(DOI: 10.1117/12.2216439,   Elsevier: Scopus)
15. Kiyoko Tateishi, Yusaku Yamaguchi, Omar M. Abou Al-Ola, Takeshi Kojima and Tetsuya Yoshinaga :
Continuous analog of multiplicative algebraic reconstruction technique for computed tomography,
Progress in Biomedical Optics and Imaging - Proceedings of SPIE, Vol.9783, San Diego, Feb. 2016.
(DOI: 10.1117/12.2214598,   Elsevier: Scopus)

Proceeding of Domestic Conference:

1. Akira Kinokiri, Masashi Kimura, Takeshi Kojima and Tetsuya Yoshinaga :
ヘリンガー距離の全変動に基づく正則化を考慮した連続時間CT画像再構成法,
中四国放射線医療技術フォーラム, Nov. 2018.
2. Ryosuke Kasai, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
期待値最大化法と乗法的代数的再構成法を拡張した新しい逐次CT画像再構成法の特性,
中四国放射線医療技術フォーラム, Nov. 2018.
3. Moe Kudoh, Yusaku Yamaguchi, Omar M. Abou Al-Ola, Takeshi Kojima and Tetsuya Yoshinaga :
一般化ヘリンガー距離の最小化に基づく逐次画像再構成法,
Proceedings of the 116th Scientific Meeting of JSMP, Vol.38, No.3, Sep. 2018.
4. Yusaku Yamaguchi, Ryosuke Kasai, Takeshi Kojima and Tetsuya Yoshinaga :
連続時間断層画像再構成法の加法的・乗法的及びその混成による離散化,
Proceedings of the 116th Scientific Meeting of JSMP, Vol.38, No.3, Sep. 2018.
5. Masahide Tominaga, Motoharu Sasaki, Motokatsu Yasutomo, Kenji Yamada, Takeshi Kojima, Akihiro Haga, Hitoshi Ikushima and 角谷 倫之 :
Digital Phantomを用いたImage Registrationソフトウェアの性能評価,
第31回高精度放射線外部照射部会学術大会, Feb. 2018.
6. Moe Kudo, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
一般化 Hellinger 距離の最小化に基づくCT画像再構成,
第40回日本生体医工学会中国四国支部大会プログラム講演抄録, Oct. 2017.
7. Daisuke Ikeda, Kisaki Mizuta, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Applying Dynamical Reconstruction Method Based on Hellinger Distance Minimization to X-ray CT Imaging,
日本放射線技術学会第73回総会学術大会予稿集, Apr. 2017.
8. Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Magnetic Resonance Image Reconstruction Based on Nonautonomous Nonlinear Differential Equation,
日本放射線技術学会第73回総会学術大会予稿集, Apr. 2017.
9. Masahide Tominaga, Motoharu Sasaki, 安友 基勝, Takeshi Kojima, Kenji Yamada, Hitoshi Ikushima and 角谷 倫之 :
市販Image registrationソフトウェアの評価用Digital Phantomの開発,
日本放射線腫瘍学会第30回高精度外部放射部会学術大会, Mar. 2017.
10. Kisaki Mizuta, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Hellinger 距離の最小化に基づくCT画像再構成,
第39回日本生体医工学会中国四国支部大会プログラム講演抄録, Oct. 2016.
11. Keita Nakahama, Takeshi Kojima and Tetsuya Yoshinaga :
微分方程式を用いた離散トモグラフィのX線CT画像への適用,
第39回日本生体医工学会中国四国支部大会プログラム講演抄録, Oct. 2016.
12. Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
Magnetic resonance image reconstruction for non-Cartesian sampling schemes,
第44回日本磁気共鳴医学会大会, Sep. 2016.
13. Kiyoko Tateishi, Yusaku Yamaguchi, Takeshi Kojima and Tetsuya Yoshinaga :
逐次CT画像再構成アルゴリズム構築の新しいアプローチ,
医用画像情報学会(MII)平成28年度年次(第175回)大会誌, 28, Jun. 2016.
14. Yusaku Yamaguchi, Michiko Mori, Takeshi Kojima and Tetsuya Yoshinaga :
非線形微分方程式に基づく磁気共鳴画像再構成,
医用画像情報学会(MII)平成28年度年次(第175回)大会誌, 23, Jun. 2016.
15. Shintaro Harano, Takeshi Kojima and Tetsuya Yoshinaga :
Effect of metal artifact reduction using continuous-time CT image reconstruction method,
第111回日本医学物理学会学術大会, Apr. 2016.
16. Keita Nakahama, Takeshi Kojima and Tetsuya Yoshinaga :
Discrete tomographic image reconstruction using differential equation,
第111回日本医学物理学会学術大会, Apr. 2016.
17. Keita Nakahama, Takeshi Kojima and Tetsuya Yoshinaga :
微分方程式を用いた離散トモグラフィ画像再構成法の数値実験による検討,
島根県診療放射線技師会平成27年度春季学術大会, Mar. 2016.
18. Shintaro Harano, Takeshi Kojima and Tetsuya Yoshinaga :
金属アーチファクト削減のための連続時間 CT 画像再構成法,
第38回日本生体医工学会中国四国支部大会プログラム講演抄録, Nov. 2015.
19. Keita Nakahama, Takeshi Kojima and Tetsuya Yoshinaga :
非線形微分方程式を用いた離散トモグラフィ,
第38回日本生体医工学会中国四国支部大会プログラム講演抄録, Nov. 2015.

Et cetera, Workshop:

1. Takeshi Kojima and Tetsuya Yoshinaga :
Discrete tomography based on competition model,
The Papers of Technical Meeting, IEE JAPAN, Nov. 2015.

Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)