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자료유형
학술저널
저자정보
김기웅 (Biomagnetism Research Center, Korea Research Institute of Standards and Science) 이용호 (Biomagnetism Research Center, Korea Research Institute of Standards and Science) 권혁찬 (Biomagnetism Research Center, Korea Research Institute of Standards and Science) 김진목 (Biomagnetism Research Center, Korea Research Institute of Standards and Science) 김인선 (Biomagnetism Research Center, Korea Research Institute of Standards and Science) 박용기 (Biomagnetism Research Center, Korea Research Institute of Standards and Science) 이규원 (Biomagnetism Research Center, Korea Research Institute of Standards and Science)
저널정보
한국초전도학회 Progress in superconductivity Progress in superconductivity 제6권 제1호
발행연도
2004.1
수록면
56 - 63 (8page)

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We consider design factors for a SQUID sensor array to construct a 52-channel magnetocardiogram (MCG) system that can be used to measure tangential components of the cardiac magnetic fields. Nowadays, full-size multichannel MCG systems, which cover the whole signal area of a heart, are developed to improve the clinical analysis with high accuracy and to provide patients with comfort in the course of measurement. To design the full-size MCG system, we have to make a compromise between cost and performance. The cost is involved with the number of sensors, the number of the electronics, the size of a cooling dewar, the consumption of refrigerants for maintenance, and etc. The performance is the capability of covering the whole heart volume at once and of localizing current sources with a small error. In this study, we design the cost-effective arrangement of sensors for MCG by considering an adequate sensor interval and the confidence region of a tolerable localization error, which covers the heart. In order to fit the detector array on the cylindrical dewar economically, we removed the detectors that were located at the corners of the array square. Through simulations using the confidence region method, we verified that our design of the detector array was good enough to obtain whole information from the heart at a time. A result of the simulation also suggested that tangential-component MCG measurement could localize deeper current dipoles than normal-component MCG measurement with the same confidence volume; therefore, we conclude that measurement of the tangential component is more suitable to an MCG system than measurement of the normal component.

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