A superconducting quantum interference device magnetometer with a room-temperature pickup coil for measuring impedance magnetocardiograms

被引：17
|
作者：
Kandori, A [1 ]
Suzuki, D [1 ]
Yokosawa, K [1 ]
Tsukamoto, A [1 ]
Miyashita, T [1 ]
Tsukada, K [1 ]
Takagi, K [1 ]
机构：
[1] Hitachi Ltd, Cent Res Lab, Kokubunji, Tokyo 1858601, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2002年 / 41卷 / 2A期
关键词：
SQUID; magnetometer; impedance-magnetocardiogram; pickup-coil; flux transformer;
D O I：
10.1143/JJAP.41.596
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
To measure an impedance magnetocardiogram (I-MCG) signal, we have developed a superconducting quantum interference device (SQUID) magnetometer with a room-temperature pickup coil. The pickup coil (30-mm diameter) is set outside the cryostat and is connected to the input coil in the SQUID. The noise level of the magnetometer is 90 fT Hz(-1/2) at 10 kHz. Using the magnetometer, we measured I-MCG signals (below 15 pT)-which were obtained by applying an ac current (10 kHz) with constant amplitude (7 mA, peak-to-peak) to a subject-from the heart.
引用
收藏
页码：596 / 599
页数：4
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