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| Topology optimization based method for coil arrangement for homogeneous magnetic field |
| Received:April 07, 2012 Revised:July 20, 2012 |
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| DOI：10.7511/jslx201304004 |
| KeyWord:magnetic resonance imaging topology optimization uniform magnetic field |
| Author | Institution |
| 刘书田 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
| 王奇 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
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| Abstract: |
| It is the key to important medical diagnostic equipment that designing excitation structure in certain region to produce a magnetic field with adequate strength and uniformity.Based on the topology optimization method,we propose an optimal method which can design the spatial arrangement of superconducting excitation coil to produce a homogeneous magnetic field in magnetic resonance imaging apparatus.With the distribution parameters of the excitation coil in a given area as design variables,and the mean square error of the magnetic field in the desired area as the uniformity indicator,considering the limits of the coil's volume and the strength of the magnetic field,we establish a mathematical model for the uniform magnetic field design problems.Using the proposed optimization model,we get a specific design and by the simulation of the design result,we verify the homogeneity of the magnetic field and the effectiveness of the method. |