Optimization of an 8-Channel Loop-Array Coil for a 7 T MRI System with the Guidance of a Co-Simulation Approach
Yan XQ(燕新强); Ma CX(马创新); Yan, XQ; Ma, CX; Shi, L; Zhuo, Y; Zhou, XJ; Wei, L; Xue, R; Wei L(魏龙)
刊名APPLIED MAGNETIC RESONANCE
2014
卷号45期号:5页码:437-449
学科分类Physics; Spectroscopy
DOI10.1007/s00723-014-0526-6
英文摘要Minimizing coupling between coil elements is technically challenging in designing large-sized, volume-type phased-array coils for human head imaging at ultrahigh fields, e.g., 7 T. As a widely used decoupling method, the capacitive decoupling method has shown excellent performance for loop array. However, building a multi-channel loop array with capacitive decoupling method is laborious that tuning frequency and matching of one coil element will affect adjacent elements and even next adjacent elements. In this study, we made an 8-channel loop-array transmit/receive radio-frequency coil on a 7 T magnetic resonance imaging system with the guidance of frequency domain three-dimensional electromagnetic and radio-frequency circuit co-simulation. The position of decoupling capacitors was investigated and values of all capacitors were predicted from co-simulation. The co-simulation approach cost about 2 days and the error of the predicted and practical capacitance was < 5 %. To demonstrate the accuracy of simulation, we evaluated the simulated and measured S-parameter matrixes and B (1) (+) profiles in a birdcage-like excitation mode on a cylindrical water phantom. In addition, B (1) (+) maps and images of human head were shown with the fabricated coil. To demonstrate the parallel imaging performance of this coil array, GRE images using GRAPPA acceleration with the reduction factor R of 1, 2, 3, and 4 were acquired.
收录类别SCI
WOS记录号WOS:000335156500003
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224821
专题中国科学院高能物理研究所_核技术应用研究中心_期刊论文
中国科学院高能物理研究所_核技术应用研究中心
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Yan XQ,Ma CX,Yan, XQ,et al. Optimization of an 8-Channel Loop-Array Coil for a 7 T MRI System with the Guidance of a Co-Simulation Approach[J]. APPLIED MAGNETIC RESONANCE,2014,45(5):437-449.
APA 燕新强.,马创新.,Yan, XQ.,Ma, CX.,Shi, L.,...&魏龙.(2014).Optimization of an 8-Channel Loop-Array Coil for a 7 T MRI System with the Guidance of a Co-Simulation Approach.APPLIED MAGNETIC RESONANCE,45(5),437-449.
MLA 燕新强,et al."Optimization of an 8-Channel Loop-Array Coil for a 7 T MRI System with the Guidance of a Co-Simulation Approach".APPLIED MAGNETIC RESONANCE 45.5(2014):437-449.
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