Single-shot dual frequency excitation for magnetic induction tomography (MIT) at frequencies above 1 MHz

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


In order to make MIT fast it is recommendable to excite several transmit coils in parallel and to acquire all receive channels simultaneously. The separation between the transmit channels can be achieved e.g. by slightly separating the excitation frequencies, so that it is possible to separate their contributions in the receivers by synchronous demodulation. One major problem is the low output impedance of the driver amplifiers so that each transmit coil acts as short circuited when seen from the other transceivers and hence perturbs the primary field. This causes a number of complications both in the reconstruction software as well as from the viewpoint of SNR optimization. Therefore we propose a special passive coupling network which transforms the low driver impedance into a high termination impedance for the coils at two frequencies (1 MHz and 10 MHz). We designed a dual-frequency transformation networks which operates at 1 and 10 MHz and which provides a termination impedance >5kΩ. The feeding current is typically 10mA per Volt driving voltage.
Original languageEnglish
Title of host publicationXIV International Conference on Electrical Bioimpedance
Number of pages5
Publication statusPublished - 2010

Publication series

NameJournal of Physics: Conference Series

Treatment code (Nähere Zuordnung)

  • Application


Dive into the research topics of 'Single-shot dual frequency excitation for magnetic induction tomography (MIT) at frequencies above 1 MHz'. Together they form a unique fingerprint.

Cite this