胎儿心磁图检测的多通道SQUID系统

Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI:10.1109/ICBEM.1998.666429

A. Kandori, K. Tsukada, H. Horigome, M. Asaka, S. Shigemitsu, M. Takahashi, Y. Terada, T. Kubo, Akira Matsui, T. Mitsui

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引用次数: 8

摘要

研制了一种用于检测胎儿心脏活动产生的弱磁场的九通道SQUID磁强计系统。9个直径20毫米的轴向一阶梯度仪每隔30毫米安装一次。采集线圈的基线长度为60毫米，用于测量胎儿心脏深处的弱磁场。SQUID由一个磁通锁定环路(FLL)电路操作，FLL输出由计算机记录在1khz。对109例妊娠20 ~ 39周的胎儿进行了胎心磁图(FMCG)测量。在大多数情况下，母体MCG干扰可以忽略不计。所有受试者中有81%检测到r波峰。本文给出了胎儿R-R区间的FMCG测量和傅里叶分析结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Multichannel SQUID system for detecting fetal magnetocardiograms

A nine-channel SQUID magnetometer system is developed to detect weak magnetic fields generated by fetal cardiac activity. The nine 20-mm-diameter axial first-order gradiometers are mounted at intervals of 30 mm. A baseline length of 60 mm is applied to the pickup coil to measure the weak magnetic field from a fetal heart in a deep position. The SQUID is operated with a flux-locked loop (FLL) circuit and the FLL output is recorded at 1 kHz by a computer. Fetal magneto-cardiograms (FMCG) were measured for 109 fetuses of 20 to 39 weeks' gestation. In most cases, maternal MCG interference was negligible. R-wave peaks were detected in 81% of all subjects. The results of FMCG measurements and Fourier analysis of fetal the R-R interval are shown in this paper.

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Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)

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