Abstract

It is of significance to image electrical impedance distribution of biological tissue. We have proposed and developed a new approach for high resolution electrical impedance imaging, by integrating the ultrasound and magnetism -- magnetoacoustic tomography with magnetic induction (MAT-MI). In MAT-MI, the object is located in a static magnetic field and a time-varying pulsed magnetic field. The pulsed magnetic field induces eddy current in the sample. Consequently, the sample will emit ultrasonic waves by the Lorentz force. The acoustic signals are collected around the object to reconstruct images related with the electrical impedance distribution in the object. We have conducted theoretical, computational and experimental studies to demonstrate the feasibility of imaging electrical impedance properties with mm resolution by means of MAT-MI. In this presentation, we will discuss the principles of MAT-MI in imaging electrical impedance properties and recent computational and experimental results.

Biographic Sketch

Dr. Bin He is Professor of Biomedical Engineering, Electrical Engineering, and Neuroscience, and serves as the Director of Biomedical Functional Imaging and Neuroengineering Laboratory and Interim Director of Center for Neuroengineering at the University of Minnesota at Twin Cities. Dr. He's major research interests include biomedical imaging and neural engineering. His lab has been active in neuroimaging, cardiac imaging, cancer imaging, neuro-interfacing, and computational biomedicine, supported by multiple NIH and NSF grants in which Dr. He serves as the PI. Dr. He is a Fellow of IEEE and the American Institute of Medical and Biological Engineering, the recipient of NSF CAREER Award, American Heart Association Established Investigator Award, and is listed in Who’s Who in America and Who's Who in the World. Dr. He has been active in professional activities in the field of biomedical engineering. He served as the President of International Society of Bioelectromagnetism (2002-2005), and serves as the President-elect of IEEE Engineering in Medicine and Biology Society in 2008.