Simulation and Optimization of a Permanent Magnet for Small-sized MRI by Genetic Algorithm

DOI

10.2991/icsem.2013.158How to use a DOI?

Keywords

simulation, optimization, permanent magnet, genetic algorithm

Abstract

The main magnet produces the main magnetic field in the imaging area as one of the important parts of the magnetic resonance imaging (MRI) system. In a permanent MRI magnet, the widespread end effect causes a non-uniform magnetic field distribution and affects the imaging quality. In this paper, an H-type permanent magnet for small-sized MRI applications was designed; in particular, we added an optimized shimming ring outside the pole piece to improve the magnetic field uniformity. Genetic algorithms are used to solve the complex and nonlinear calculation of the magnetic field. The simulation results show that the magnet optimized by the proposed method generates a homogeneous magnetic field that can be easily implemented in practice.

Copyright

© 2013, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yiyuan Cheng
AU  - Ling Xia
AU  - Wei He
PY  - 2013/04
DA  - 2013/04
TI  - Simulation and Optimization of a Permanent Magnet for Small-sized MRI by Genetic Algorithm
BT  - Proceedings of the 2nd International Conference On Systems Engineering and Modeling (ICSEM 2013)
PB  - Atlantis Press
SP  - 769
EP  - 772
SN  - 1951-6851
UR  - https://doi.org/10.2991/icsem.2013.158
DO  - 10.2991/icsem.2013.158
ID  - Cheng2013/04
ER  -