Apparatus and method for measuring weak, location-dependent and

Details Apparatus and method for measuring weak, location-dependent and Apparatus and method for measuring weak, location-dependent and

1991-10-09

1992-10-06

Smith, Ruth S.

Surgery

Truss

Pad

128731, 324248, 324262, A61B 505

Patent

active

051522888

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.

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