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Research Abstracts Online
January 2008 - March 2009

University of Minnesota Twin Cities
Medical School
Department of Physical Medicine and Rehabilitation

PI: Robert P. Patterson, Associate Fellow

Modeling of Electric Potentials in Human Thorax

This project investigates various electrical measurements in the body. Three-dimensional models of the human thorax are generated from magnetic resonance images. These images are segmented and all tissues are assigned a corresponding electrical resistivity. Current paths through the body may then be studied by placing electrodes in the thorax model and solving the resulting forward problem. This group’s finite difference models consist of 3.8 million elements. Applications include design of implantable pacemakers and defibrillator electrode systems, impedance cardiography, body fluid and fat measurement, and electrical impedance tomography.

Recent work has focused on measuring pulmonary edema using both internal pacemaker leads and external electrodes. The researchers are finishing up their work on defibrillation current density pattern in the heart based on lead locations and possible tissue damage.

Group Member

Fei Yang, Research Associate