Title :
Newly Designed 3 T MRI Magnet Wound With Bi-2223 Tape Conductors
Author :
Terao, Yutaka ; Ozaki, Osamu ; Ichihara, C. ; Kawashima, S. ; Hase, Tomohiro ; Kitaguchi, Hitoshi ; Kobayashi, S. ; Sato, Kiminori ; Nakajima, Isao ; Oonishi, N. ; Poole, Michael ; Takeda, Kenji ; Urayama, Shinichi ; Fukuyama, Hidenao
Author_Institution :
Kobe Steel, Ltd., Kobe, Japan
Abstract :
We have designed and fabricated a 3T magnetic resonance imaging magnet system for the human brain, which was wound with Bi-2223 tape conductors. Cooled by a Gifford-McMahon cryocooler, it was operated at 20 K with a stored energy of 2.3 MJ. A magnetic-field homogeneity of 5 ppm was attained at 1.5 T, which was our target value. Using this Bi-2223 high-temperature superconducting magnet, we obtained magnetic resonance images in 1.5 T at 8.5 K. The system was successfully magnetized to 3 T, which is the final target field in our project. This work demonstrates the potential of the high-temperature superconducting magnet for use in human magnetic resonance imaging experiments.
Keywords :
biomedical MRI; brain; high-temperature superconductors; superconducting magnets; Bi-2223 high-temperature superconducting magnet; Bi-2223 tape conductor; Gifford-McMahon cryocooler; MRI magnet wound; human brain; human magnetic resonance imaging experiment; magnetic resonance imaging magnet system; magnetic-field homogeneity; temperature 8.5 K; Coils; High temperature superconductors; Magnetic fields; Magnetic resonance imaging; Magnetomechanical effects; Superconducting magnets; Temperature measurement; Bi-2223; cryocooler; imaging; magnetic resonance imaging (MRI);
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2013.2239342
