Patent ID: 7660617
Filing Date: 2010-02-09
Classification: A61B

Abstract:
1. An electrical impedance tomography (“EIT”) method for evaluating interior features of a region of a body under test with a plurality of electrodes, said method comprising: attaching a plurality of electrodes to the region of the body to form an electrode array surrounding the region, wherein each electrode of the plurality of electrodes comprises an electrode pad with at least one voltage lead and one current lead; designating a first one of the plurality of electrodes as a source electrode, and a second one of the plurality of electrodes as a sink electrode; establishing a virtual short between said source electrode and all other electrodes of the plurality of electrodes other than said sink electrode, wherein the virtual short is established by maintaining the source electrode and the all other electrodes at a predetermined voltage; applying a test current to said source electrode; measuring a sense voltage between said source electrode and said sink electrode; and repeating the designating, establishing, applying, and measuring steps for different source and sink electrodes in the plurality of electrodes; and reconstructing an image of the region of the body under test based on the applied test current and the measured sense voltage.