Multi-Frequency EIT has been developed to evaluate the permittivity spectrum of a medium using an improved Howland source. Stray capacitance reduces the output impedance, bandwidth of the data collection leading to erroneous measurements. To address this, we have designed a current source, which uses a novel OCCII - GIC to cancel stray capacitance. The system achieves high output impedance over a 5 MHz frequency range.
History
Publication status
Published
File Version
Published version
Journal
Proceedings of the 16th International Conference on Biomedical Applications of Electrical Impedance Tomography; Neuchâtel, Switzerland; 3-5 June 2015