Raymond D Cook

US Patent:

55446620, Aug 13, 1996

Filed:

Oct 6, 1993

Appl. No.:

8/132457

Inventors:

Gary J. Saulnier - Rexford NY
David G. Gisser - Albany NY
Jonathan C. Newell - Glenmont NY
Raymond D. Cook - Reston VA
John C. Goble - Charlottesville VA
David Isaacson - Latham NY

Assignee:

Rensselaer Polytechnic Institute - Troy NY

International Classification:

A61B 505

US Classification:

128734

Abstract:

An apparatus for electrical impedance imaging of a body includes an array of multiple electrodes. Each is connected to an adjustable amplitude precision current source of fixed frequency and an oversampling type digital voltmeter. The current amplitudes are set to produce a series of spatial current patterns, all orthogonal to each other, and each applied for only a short time interval while voltages are measured. The voltage and current values are used to create real and reactive impedance images of the interior of the body.