Title :
An inverse approach to the design of MRI main magnets
Author :
Thompson, Michael R. ; Brown, Robert W. ; Srivastava, Vishnu C.
Author_Institution :
Dept. of Phys., Case Western Reserve Univ., Cleveland, OH, USA
fDate :
1/1/1994 12:00:00 AM
Abstract :
We present a new method for the design of MRI main magnets, based on a variational approach with constraints introduced by Lagrange multipliers. The extrema are located with a combination of analytical and numerical techniques. This method has been tested in the design of non-shielded and actively-shielded magnets. Several representative designs are given. The method is very flexible, having been applied also to the investigation of gradient coils, and could be adapted to the design of other static and quasi-static field systems. It may also be used to consider alternate geometries
Keywords :
inverse problems; magnetic shielding; nuclear magnetic resonance imaging; superconducting magnets; variational techniques; Lagrange multipliers; MRI main magnet design; actively-shielded magnets; gradient coils; inverse approach; nonshielded magnets; numerical techniques; quasi-static field systems; spatially homogeneous solutions; superconducting main magnet; variational approach; Calculus; Coils; Design methodology; Geometry; Lagrangian functions; Magnetic analysis; Magnetic resonance imaging; Nuclear magnetic resonance; Superconducting magnets; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
