首页> 外文会议>Microwave Conference Proceedings (APMC), 2011 Asia-Pacific >Analysis of RF transmit performance for a multi-row multi-channel MRI loop array at 300 and 400 MHz
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Analysis of RF transmit performance for a multi-row multi-channel MRI loop array at 300 and 400 MHz

机译:多行多通道MRI回路阵列在300和400 MHz下的RF发射性能分析

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摘要

We present a numerical investigation of the near radiofrequency fields generated by a set of multi-row multichannel MRI loop array at 300 and 400 MHz using RF circuit and frequency domain 3-D EM co-simulation. Significant improvement of B1+ homogeneity with a simultaneous increase of coverage in the axial direction can be obtained by using a multi-row array together with a static volume RF shim. At 300 MHz increasing element number more than four inside one row, results in no improvement of B1+ homogeneity in case of static volume RF shimming, higher element coupling and fabrication complexity.
机译:我们提出了使用RF电路和频域3-D EM联合仿真在300和400 MHz下由一组多行多通道MRI环形阵列产生的近射频场的数值研究。通过将多行阵列与静态体积RF垫片一起使用,可以获得B1 +均匀性的显着改善,同时在轴向方向上的覆盖率也得以提高。在300 MHz的情况下,在一排中增加四个以上的元素数,则在静态体积RF匀场,更高的元素耦合和制造复杂性的情况下,不会改善B1 +均匀性。

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