A Magneto-Acoustic Method for the Noninvasive Measurement of Bioelectric Currents

B. C. Towe, M. R. Islam

Research output: Contribution to journalArticlepeer-review

77 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)892-894
Number of pages3
JournalIEEE Transactions on Biomedical Engineering
Issue number10
StatePublished - Oct 1988

ASJC Scopus subject areas

  • Biomedical Engineering


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