Title :
Superconducting magnet with self-shield for whole body magnetic resonance imaging
Author :
Shimada, Y. ; Matsumoto, T. ; Moritsu, K. ; Takechi, M. ; Watanabe, T.
Author_Institution :
Mitsubishi Electr. Corp., Ako, Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
A superconducting magnet has been developed with a self-shield for whole-body magnetic resonance imaging (MRI) that features magnetic field strengths of 0.5 T, 1.0 T, and 1.5 T and has the following characteristics: (1) a low-leakage magnetic field due to the directly mounted magnetic shield (very small in the 0.5-mT range); (2) reduced helium consumption due to the use of a high adiabatic cryostat and refrigerator (does not need liquid nitrogen); (3) a horizontal service port that reduces overhead clearance requirements; (4) superior mechanical strength (can even be transported in the cooled state); and (5) an emergency run down unit
Keywords :
biomedical NMR; biomedical equipment; magnetic shielding; superconducting magnets; 0.5 to 1.5 T; emergency run down unit; high adiabatic cryostat; horizontal service port; low-leakage magnetic field; refrigerator; self-shield; superconducting magnet; whole body magnetic resonance imaging; Helium; Hospitals; Iron; Magnetic field measurement; Magnetic fields; Magnetic properties; Magnetic resonance imaging; Magnetic shielding; Refrigeration; Superconducting magnets;
Journal_Title :
Magnetics, IEEE Transactions on
