The development of a high-T/sub c/ magnetocardiography system for unshielded environment
| Autor: | J. Kruger, Rainer Eckart, Volker Doormann, W. Hoppe, Olaf Dössel, H. Laudan, G. Rabe, Bernd David |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Physics
Squid biology Magnetometer Acoustics Noise compensation White noise Condensed Matter Physics Gradiometer Electronic Optical and Magnetic Materials law.invention Nuclear magnetic resonance law biology.animal Electrical and Electronic Engineering Noise level Magnetocardiography Active noise control |
| Zdroj: | IEEE Transactions on Appiled Superconductivity. 7:3267-3270 |
| ISSN: | 1051-8223 |
| DOI: | 10.1109/77.622047 |
| Popis: | A modular, 9-channel high-T/sub c/ SQUID system for magnetocardiography (MCG) was developed and tested in an unshielded environment. Galvanically-coupled magnetometers made from Y-Ba-Cu-O films, with intrinsic white noise levels as low as 70 fT//spl radic/Hz, are used as SQUID sensors. In an unshielded environment, a noise level of about 1 pT//spl radic/Hz for each channel was achieved using an active noise compensation system. A new digital planar gradiometer is proposed. First magnetocardiograms recorded in an unshielded environment are presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|