Development of a heart monitoring system based on thin film high-T/sub c/ DC-SQUIDs

Author

Seidel, P. ; Schmidl, F. ; Weidl, R. ; Brabetz, S. ; Klemm, F. ; Wunderlich, S. ; Dorrer, L. ; Nowak, H.

Author_Institution

Inst. fur Festkorperphys., Friedrich-Schiller-Univ., Jena, Germany

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

3040

Lastpage

3043

Abstract

Our aim is to built up an one-channel heart monitoring system to achieve fast and reliable information about the patients condition as well in emergency cases as in serial examinations by a non-invasive and touchless method. Step-edge and bicrystal junctions were used to prepare planar galvanically coupled thin film gradiometers and magnetometers. These sensors were used to carry out measurements in well-shielded and weak disturbed environment and we compared the different noise properties and field gradient resolutions. The influence of antenna configuration, SQUID parameter, cooling conditions, and different kinds of signal analysis will be discussed.

Keywords

SQUID magnetometers; high-temperature superconductors; magnetocardiography; patient monitoring; superconducting thin films; antenna; bicrystal junction; cooling; gradiometer; magnetic field sensor; magnetometer; noise; noninvasive measurement; one-channel heart monitoring system; patient examination; signal analysis; step-edge junction; thin film high-T/sub c/ DC-SQUID; Antenna measurements; Condition monitoring; Couplings; Galvanizing; Heart; Magnetic field measurement; Magnetic sensors; Patient monitoring; SQUID magnetometers; Transistors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.621973

Filename

621973