高安定磁場コイルシステム基盤技術の研究開発 MRI 用REBCO 高温超電導モデルマグネット

• Published in: Teion kōgaku Vol. 52; no. 4; pp. 217 - 223
• Main Authors: 横山, 彰一, 松田, 哲也, 江口, 諒, 井上, 達也, 田邉, 肇, 大穀, 晃裕, 宮城, 大輔, 津田, 理, 中村, 武恒, 白井, 康之
• Format: Journal Article
• Language: Japanese
• Published: Tokyo 公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会) 01.01.2017; Japan Science and Technology Agency
• Subjects: Coiling; Coils; Cooling; Helium; High temperature superconductors; Liquid helium; Magnetic fields; Magnetic resonance imaging; Niobium base alloys; NMR; Nuclear magnetic resonance; R&D; Research & development; Superconducting magnets; Superconductivity; Wire
• ISSN: 0389-2441; 1880-0408
• DOI: 10.2221/jcsj.52.217

Superconducting magnets are effective for obtaining a highly stable, strong magnetic field for magnetic resonance imaging (MRI). Current MRI superconducting magnets require cooling in liquid helium at 4.2 K in order to use NbTi superconducting wire. The development of a high-temperature superconducting (HTS) coil that can be used without liquid helium cooling is greatly desired. In order to develop liquid helium-free MRI magnets using a high-temperature superconductor, the author has prototyped a model magnet that is able to generate extremely uniform, highly stable magnetic fields. This particular development includes such subjects as developing a coil structure where the superconducting characteristics do not deteriorate, working on a method of producing precision coils, designing coils that generate extremely uniform magnetic fields, and having high-temperature superconducting coils generate highly stable magnetic fields. MR imaging was carried out to verify the uniformity and stability of the magnetic fields.