Title :
Formation of homogeneous field in a shielded superconducting solenoid for an MRI
Author :
Eregin, V.E. ; Kashikhin, V.S. ; Lipatnikov, A.A. ; Severgin, Y.P. ; Shangin, V.P. ; Shatil, N.A.
Author_Institution :
Inst. of Electrophys., Leningrad, USSR
fDate :
1/1/1992 12:00:00 AM
Abstract :
Methods are proposed for homogenizing and shimming a high homogeneity solenoid with a magnetic shield. The methods make the shield design more accurate and the shim coils less complicated. The whole-body 0.5 T superconducting MRI (magnetic resonance imaging) magnet is designed to achieve a field homogeneity of 3 ppm in a 50 cm DSV. Its fringe field is less than 0.5 mT outside a radius of 5 m using 12 tons of iron
Keywords :
biomedical NMR; biomedical equipment; magnetic fields; magnetic shielding; superconducting magnets; 0.5 T; MRI; fringe field; high homogeneity solenoid; homogeneous field; homogenizing; magnetic shield; shield design; shielded superconducting solenoid; shimming; Circuits; Geometry; Iron; Least squares methods; Magnetic analysis; Magnetic resonance imaging; Magnetic shielding; Solenoids; Superconducting coils; Superconducting magnets;
Journal_Title :
Magnetics, IEEE Transactions on
