A novel method for the noninvasive measurement of low-level ionically conducted electric currents flowing in electrolytes and tissue is investigated in this work. Experiments show that 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. The basic technique has potential application to a variety of diverse electrophysiology measurement situations.
ASJC Scopus subject areas
- Biomedical Engineering