Title :
Measurement of Bioelectric Currents Based on the Coupling of Electric and Magnetic Field
Author :
Hongmiao, Zhang ; Jun, Liu ; Shaohua, Yang ; Zhengguo, Lou ; Guang, Li
Author_Institution :
Dept. of Biomed. Eng., Zhejiang Univ., Hangzhou
Abstract :
A method based on magneto-acoustic technique is developed to measure bioelectric currents non-invasively. Theoretically, vibrations of particles in the medium are produced due to the Lorentz force when oscillatory currents flow through medium in a steady magnetic field. These vibrations contain information of the bioelectric currents and can be detected by surface contact detector. An experimental setup is presented to detect the microampere level currents in saline and tissue. The results show the linear relationship between the acoustic signal and the current
Keywords :
bioelectric phenomena; biological tissues; biomagnetism; magnetoacoustic effects; vibrations; Lorentz force; bioelectric currents; electric field; magnetic field; magneto-acoustic technique; oscillatory currents; saline; surface contact detector; tissue; vibrations; Acoustic signal detection; Amplifiers; Bioelectric phenomena; Couplings; Current measurement; Electric variables measurement; Lorentz covariance; Magnetic field measurement; SQUIDs; Superconducting magnets;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1617105
