Title :
The design and construction of high field-uniformity permanent magnet system for MRI
Author :
Feng, Z.X. ; Jiang, X.H. ; Han, S.
Author_Institution :
Inst. of Electr. Eng., Acad. Sinica, Beijing, China
fDate :
1/1/1992 12:00:00 AM
Abstract :
It is shown that ferromagnetic pole pieces can effectively improve the field uniformity of an MRI (magnetic resonance imaging) device. First, the specially designed ferromagnetic pole pieces are placed onto the surfaces of the main permanent-magnet poles to improve the field uniformity preliminarily. Then, the necessary field uniformity is obtained by using the magneto-dipoles which are suitably placed in the field domain. The specially designed pole pieces can increase the field-uniformity by two orders of magnitude
Keywords :
biomedical NMR; biomedical equipment; magnetic resonance spectrometers; permanent magnets; spectrometer components and accessories; MRI; construction; design; ferromagnetic pole pieces; high field-uniformity; magneto-dipoles; permanent magnet system; Coils; Costs; Magnetic devices; Magnetic domains; Magnetic fields; Magnetic materials; Magnetic resonance imaging; Permanent magnets; Saturation magnetization; Superconducting magnets;
Journal_Title :
Magnetics, IEEE Transactions on
