New anomaly detection algorithm using multi-frequency trans-admittance maps

Jeehyun Lee, Sung Wan Kim, Sungwhan Kim, Jin Keun Seo, Habib Zribi, Eung Je Woo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


We apply a constant voltage between a distal reference electrode and a scan probe placed on the surface of a region of interest. The probe includes an array of electrodes kept at the ground potential and exit currents from those electrodes are measured. Using multiple sinusoidal frequencies in the range of 50Hz to 500kHz, the relationship between a frequency-difference trans-admittance map and a complex conductivity distribution underneath the probe can be expressed by a pair of partial differential equations coupled through conductivity and permittivity distributions. With possible applications of breast cancer detection in mind, we constructed a three-dimensional model of the breast containing an anomaly with complex conductivity different from those of its surrounding inhomogeneous background tissues. From a mathematical analysis of this multi-frequency TAS model, we found that the imaginary part of a weighted frequency-difference trans-admittance map contains the size and location information of the anomaly. We demonstrate the feasibility of the method using numerical simulations.

Original languageEnglish
Title of host publication13th International Conference on Electrical Bioimpedance and the 8th Conference on Electrical Impedance Tomography 2007, ICEBI 2007
PublisherSpringer Verlag
Number of pages4
ISBN (Print)9783540738404
Publication statusPublished - 2007

Publication series

NameIFMBE Proceedings
Volume17 IFMBE
ISSN (Print)1680-0737

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomedical Engineering


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