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MRI梯度磁场下人体心脏感应涡流仿真研究 被引量：3

Simulations study on MRI gradient field induced eddy current effect at the heart
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摘要 通过MRI中梯度磁场对人体心脏影响的模型仿真,运用FDTD方法计算出心脏部分感应涡流,并与心脏刺激阈值进行比较.结果表明,心脏感应涡流的峰值离推荐阈值尚有一定距离,因此不会诱发心室颤动,但是提高梯度场的切换频率可能会引发心室颤动. The induced eddy current is computed by simulating the effect of gradient electromagnetic field in MRI at the heart of human body with the method of FDTD. Comparing with the threshold, peak value of the induced eddy current is lower. So it cannot result in the ventricular fibrillation. We draw a conclusion on the induced eddy current under the general gradient field with switching frequency about several thousand Hz will not induce the ventricular fibrillation. But with a higher gradient field switching frequency the ventricular fibrillation will occur probably.
作者 徐文龙 陶贵生 夏灵
机构地区 中国计量学院信息工程学院 浙江大学生物医学工程与仪器科学学院
出处 《中国计量学院学报》 2005年第3期195-198,共4页 Journal of China Jiliang University
基金 国家自然科学基金资助项目(No.30370400) 浙江省自然科学基金资助项目(No.Y204324)
关键词 时域有限差分法 吸收边界条件 磁共振成像(MRI) 感应涡流 梯度磁场 FDTD method absorbing boundary condition MRI induced eddy current gradient field
分类号 R540.4 [医药卫生—心血管疾病] Q64 [生物学—生物物理学]
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参考文献6

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二级参考文献17

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二级引证文献6

中国计量学院学报
2005年 第3期

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