Method and apparatus for non-invasive identification of the endo

Details Method and apparatus for non-invasive identification of the endo Method and apparatus for non-invasive identification of the endo

1993-12-10

1995-06-06

Rimell, Sam

Surgery

Truss

Pad

128693, A61B 500

Patent

active

054213452

ABSTRACT:
In a method and apparatus for identifying the spatial distribution of electrical impedance within an examination subject, a source of electrical current is electrically connected to at least two feed electrodes which impress a feed current from the source in an examination region of a subject. The resulting magnetic field is measured at points outside the examination region, and an equivalent current density distribution is reconstructed within the examination region from the measured values of the magnetic field by an evaluation unit. A compensation conductor is connected to the current source. The current source delivers a compensation current, which flows in a direction opposite to the feed current, through the compensation conductor loop, so that the magnetic field generated by the feed current in the connecting lines is compensated. The evaluation unit identifies the spatial distribution of the impedance from the equivalent current density distribution. The spatial distribution of the impedance can be portrayed on a display.

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