我们建立了一套基于高温超导量子干涉仪(SQUID)的可靠的、经济型的单通道心磁图(MCG)系统,该系统在一个简易的磁屏蔽室(MSR)中运行.实验结果表明,对于消除心磁测量中的环境噪声,简易磁屏蔽室和有源补偿相结合是一个很合适的方案,这种方案对心磁图的普及有实际的帮助.同时,本文给出了一个有源补偿的简单模型,并将计算结果与实验数据进行了比较.
We have constructed a reliable and economical single-channel magnetocardiogram (MCG) system based on high-Tc SQUIDs operated in a simply magnetically shielded room (MSR). Experimental results show that the combination of a simple MSR and an active shielding is an appropriate scheme for the environmental noise cancellation in MCG measurements and might be a practical way towards the popularization of MCGs. Meanwhile, a simple model for active shielding is presented and compared with experimental data.
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