Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Discretized solenoid design of a 1.5 T and a 3.0 T REBCO whole-body MRI magnets with cost comparison according to magnetic flux

  • Wonju Jung (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Geonyoung Kim (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Kibum Choi (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Hyunsoo Park (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Seungyong Hahn (Department of Electrical and Computer Engineering, Seoul National University)
  • Received : 2023.11.23
  • Accepted : 2023.12.29
  • Published : 2023.12.31
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Abstract

Rare earth barium copper oxide (REBCO) materials have shown the possibility of high-temperature superconductor (HTS) magnetic resonance imaging (MRI) magnets due to their elevated transition temperature. While numerous MRI magnet designs have emerged, there is a growing emphasis on estimating the cost before manufacturing. In this paper, we propose two designs of REBCO whole-body MRI magnets: (1) 1.5 T and (2) 3.0 T, the standard center field choices for hospital use, and compare their costs based on conductor usage. The basis topology of the design method is based on discretized solenoids to enhance field homogeneity. Magnetic stress calculation is done to further prove the mechanical feasibility of their construction. Multi-width winding technique and outer notch structure are used to improve critical current characteristic. We apply consistent constraints for current margins, sizes, and field homogeneities to ensure an equal cost comparison. A graph is plotted to show the cost increase with magnetic flux growth. Additionally, we compare our designs to two additional MRI magnet designs from other publications with respect to the cost and magnetic flux, and present the linear relationship between them.

Keywords

Acknowledgement

This work was supported in part by National R&D Program through the National Research Foundation of Korea(NRF) funded by Ministry of Science and ICT(2022M3I9A1072846), by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry, and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety) (Project Number: RS-2020-KD000063), and by the Applied Superconductivity Center, Electric Power Research Institute of Seoul National University.

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