Kyushu University Academic Staff Educational and Research Activities Database
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Teruyoshi Sasayama Last modified date:2020.08.07

Graduate School
Undergraduate School

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Academic Degree
Doctor of Engineering
Country of degree conferring institution (Overseas)
Field of Specialization
Biomedical Engineering
Total Priod of education and research career in the foreign country
Research Interests
  • Development of Bioimaging System utilizing Magnetic Markers
    keyword : magnetic marker, bioimaging, filed map
Academic Activities
1. Teruyoshi Sasayama, Takashi Yoshida, Keiji Enpuku, Two-dimensional magnetic nanoparticle imaging using multiple magnetic sensors based on amplitude modulation, Journal of Magnetism and Magnetic Materials, 10.1016/j.jmmm.2020.166765, 505, 166765, 2020.07.
2. Teruyoshi Sasayama, Yuya Tsujita, Manabu Morishita, Masahiro Muta, Takashi Yoshida, Keiji Enpuku, Three-dimensional magnetic nanoparticle imaging using small field gradient and multiple pickup coils, Journal of Magnetism and Magnetic Materials, 427, 1, 144-150, 2017.04, 磁気マーカーの位置及び量を定量化する磁気ナノ粒子イメージング(MPI)において,イメージングに必須の傾斜磁場を弱めてもイメージングできる手法を開発した.このことにより,小型の電源でイメージングできるようになり,実用化の第一歩となった..
3. Teruyoshi Sasayama, Tomoki Ishida, Masaaki Matsuo, Keiji Enpuku, Thickness Measurement of an Iron Plate using Low Frequency Eddy Current Testing with an HTS Coil, IEEE Transactions on Applied Superconductivity, 10.1109/TASC.2016.2535366, 26, 5, 9001305, 2016.08.
4. Teruyoshi Sasayama, Takashi Yoshida, Mohd Mawardi Saari, Keiji Enpuku, Comparison of volume distribution of magnetic nanoparticles obtained from M-H curve with a mixture of log-normal distributions, Journal of Applied Physics, 10.1063/1.4919268, 117, 17, 17D155, 2015.05.
5. Teruyoshi Sasayama, Yuji Gotoh, Keiji Enpuku, Application of Minimum Variance Beamformer for Estimation of Tip Position of a Nasogastric Tube, IEEE Transactions on Magnetics, 50, 11, 5101404, 2014.11, When a patient is not capable of eating a meal due to difficulty in swallowing, a nasogastric tube can be inserted through the nose to the stomach to provide nourishment in liquid form. However, it is possible to insert the tube into the lungs by mistake. In this study, we apply a minimum variance beamformer, which is commonly used in brain signal source detection, to estimate the position of the magnet attached to the tip of a nasogastric tube. To reduce the computational cost, the signal source power is calculated with two different resolutions. Furthermore, the signal source power calculations are performed in parallel. The position may be estimated in less than 1.0 s, making this method suitable for detecting the tip position of a nasogastric tube in real time..
6. Takayuki Okimura, Teruyoshi Sasayama, Norio Takahashi, Soichiro Ikuno, Parallelization of Finite Element Analysis of Nonlinear Magnetic Fields Using GPU, IEEE Transactions on Magnetics, 49, 5, 1557-1560, 2013.05, GPUを用いた有限要素法の並列化により非線形磁場解析を高速化した.可変的前処理に用いる反復法として,CG法やJOR法,CR法を用い比較検討を行った.特に,GPU計算での可変的前処理にCG法を用いることで,CPUで計算を行うより約40倍早く計算できた..
Works, Software and Database
1. Teruyoshi Sasayama , Wataru Yoshimura, Keiji Enpuku, Eddy current testing using square wave excitation current for detection of backside defect of steel plate, International Symposium on Applied Electromagnetics and Mechanics (ISEM), 2019.09.
2. Teruyoshi Sasayama , Takashi Yoshida, Keiji Enpuku, Spatial distribution imaging of magnetic nanoparticles using pickup coil array, Joint European Magnetic Symposia (JEMS), 2019.08.
Membership in Academic Society
  • The Institute of Electrical and Electronics Engineers
  • The Institute of Electrical Engineers of Japan
  • The Institute of Electronics, Information and Communication Engineers
  • The Japan Society of Applied Physics
  • The Magnetics Society of Japan
  • The Japanese Society for Non-Destructive Inspection
  • The Iron and Steel Institute of Japan (ISIJ)
  • Cryogenics and Superconductivity Society of Japan