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Three-Dimensional Optimization of Correction Iron Pieces for Open High Field MRI System

2004; IEEE Council on Superconductivity; Volume: 14; Issue: 2 Linguagem: Inglês

10.1109/tasc.2004.831019

1558-2515

S. Kakugawa, N. Hino, Akiyoshi Komura, Masashi Kitamura, Hiroyuki Takeshima, T. Yatsuo, Hideo Tazaki,

Magnetic properties of thin films

We have developed a new magnet for open high field (0.7 T) MRI systems. In order to homogenize magnetic fields in the field of view, an optimization method to determine initial configurations of large correction iron pieces was developed. In our method, we combined linear programming (LP) and 3D magnetic FEA and, using analytic formulae for LP, we computed field harmonics due to the volume of magnetized iron.