Title :
A magneto-acoustic method for the noninvasive measurement of bioelectric currents
Author :
Towe, Bruce C. ; Islam, Mohammed Rezaul
Author_Institution :
Bioeng. Program, Arizona State Univ., Tempe, AZ, USA
Abstract :
A method for the noninvasive measurement of low-level ionically conducted electric currents flowing in electrolytes and tissue is investigated. Experiments show that the application of oscillating magnetic fields to current-carrying media will cause focal Lorentz forces which generate detectable vibrations. These vibrations can be sensitively and noninvasively detected by surface contact detectors and can be used to determine the magnitude of internal current flows. Microampere-level currents introduced in hamsters to simulate natural bioelectric currents have been sensitively detected by this approach.
Keywords :
bioelectric phenomena; biological techniques and instruments; electric current measurement; magnetoacoustic effects; bioelectric currents; electrolytes; focal Lorentz forces; hamsters; ionically conducted electric currents; magneto-acoustic method; noninvasive measurement; oscillating magnetic fields; tissue; vibrations; Bioelectric phenomena; Current measurement; Electrochemical machining; Intestines; Noninvasive treatment; Pulse measurements; Space vector pulse width modulation; Surgery; Switches; Ultrasonic imaging; Acoustic Stimulation; Animals; Audiometry; Bioelectric Energy Sources; Cricetinae; Electric Conductivity; Equipment Design; Ions; Magnetics;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
