The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 1992
Filed:
Oct. 09, 1991
Eckhardt Hoenig, Erlangen, DE;
Helmut Reichenberger, Eckental, DE;
Siegfried Schneider, Erlangen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An apparatus for measuring weak, location-dependent and time-dependent magnetic fields emitted from a source situated in an examination subject includes a sensor arrangement having at least ten gradiometers of the first order, each gradiometer being inductively coupled to a DC-SQUID. The sensor arrangement and the examination subject are disposed in a room which shields the examination subject and the sensor arrangement from magnetic fields. The room has a shielding factor of at least 10 for magnetic alternating fields having a frequency of 0.5 Hz, the shielding factor increasing with increasing frequency. A method for operating the apparatus is also disclosed.