3-D optimal shape design of ferromagnetic pole in MRI magnet of open permanent-magnet type

Kim, Dong-Hun; Kim, Byung‐Sung; Lee, Joon-Ho; Nah, Wansoo; Park, Il-Han

doi:10.1109/tasc.2002.1018679

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Cited by 20 publications

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“…In recent years, permanent magnet assemblies have been applied to the manufacturing of the MRI for wrist, ankle and so on, in addition to whole human body systems. These magnets are being widely used in the low-end medical and animal experimental MRI and have a large market demand [2].…”

Section: Introductionmentioning

confidence: 99%

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

Cheng

Xia

2013

AMM

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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.

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Section: Introductionmentioning

confidence: 99%