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首页> 外文会议>BMEI 2012;International Conference on Biomedical Engineering and Informatics >A new type of excitation coil for measurement of liver iron overload by magnetic induction method
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A new type of excitation coil for measurement of liver iron overload by magnetic induction method

机译：磁感应法测量肝铁超负荷的新型励磁线圈

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摘要

Noninvasive measurement of liver iron overload by magnetic induction (MI) method is a promising technique but low system sensitivity restricts its application due to weak secondary signal induced within biological tissues compared with the primary excitation signal. Based on the property of system sensitivity equation, a new type of excitation coil which can counteract the primary magnetic field itself at the receiving position is proposed in this paper. We derive an expression for z-component of magnetic field produced by the coil, and simulate the relation curve between the system sensitivity and the magnetic susceptibility of object. For comparison the relation curve when the excitation coil is circular coil is simulated as well. The results show that both the relation curves of the two types of excitation coil are well linear, while the system sensitivity can be more effectively improved by the new type of excitation coil than the circular coil.
机译：通过磁感应（MI）方法无创测量肝铁超负荷是一种有前途的技术，但由于与主要激发信号相比，在生物组织内产生的较弱的次要信号，低系统灵敏度限制了其应用。根据系统灵敏度方程的性质，提出了一种新型的励磁线圈，它可以抵消接收位置的一次磁场本身。我们推导了线圈产生的磁场的z分量表达式，并模拟了系统灵敏度与物体磁化率之间的关系曲线。为了比较，还模拟了励磁线圈为圆形线圈时的关系曲线。结果表明，两种励磁线圈的关系曲线都具有良好的线性关系，而新型励磁线圈比圆形励磁线圈可以更有效地提高系统灵敏度。

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