Project Overview of HTS Magnet for Ultra-high-field MRI System

Taizo Tosaka*, Hiroshi Miyazaki, Sadanori Iwai, Yasumi Otani, Masahiko Takahashi, Kenji Tasaki, Shunji Nomura, Tsutomu Kurusu, Hiroshi Ueda, So Noguchi, Atsushi Ishiyama, Shinichi Urayama, Hidenao Fukuyama

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

16 Citations (Scopus)


A project to develop an ultra-high-field magnetic resonance imaging (MRI) system based on HTS magnets using (RE)Ba2Cu3O7 (REBCO; RE=rear earth) coils is underway. The project is supported by the Japanese Ministry of Economy, Trade and Industry and aims to establish magnet technologies for a whole-body 9.4 T MRI system. REBCO wires have high critical current density in high magnetic fields and high strength against hoop stresses, and therefore, MRI magnets using REBCO coils are expected to have cryogenic systems that are smaller, lighter, and simpler than the conventional ones. A major problem in using REBCO coils for MRI magnets is the huge irregular magnetic field generated by the screening current in REBCO tapes. Thus, the main purpose of this project is to make the influence of this screening current predictable and controllable. Fundamental technologies, including treatment of the screening currents, were studied via experiments and numerical simulations using small coils. Two types of model magnets are planned to be manufactured, and the knowledge gained in the development of the model magnets will be reflected in the magnet design of a whole-body 9.4 T MRI system.

Original languageEnglish
Pages (from-to)217-220
Number of pages4
JournalPhysics Procedia
Publication statusPublished - 2015
Event27th International Symposium on Superconductivity, ISS 2014 - Tokyo, Japan
Duration: 2014 Nov 252014 Nov 27


  • HTS coil
  • MRI
  • Magnet
  • Screening current
  • Ultra-high field

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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