Our parallel current drive EIT architecture can simultaneously drive 32 independent high impedance current sources and measure 32 independent precision voltage channels. Coherent modulation and demodulation is digitally implemented using field programmable gate arrays. High accuracy and precision is achieved using custom analog circuits containing modified Howland current sources coupled to negative impedance converters.

Additional Metadata
Publisher International Steering Committee on Electrical Impedance Tomography
Series 15th International Conference on Biomedical Applications of Electrical Impedance Tomography (EIT 2014)
Citation
Ashe, Jeffrey M., Shoudy, David, Boverman, Gregory, Sabatini, James, Kao, Tzu-Jen, & Amm, Bruce C. (2014). A High Precision Parallel Current Drive Experimental EIT System. In 15th International Conference on Biomedical Applications of Electrical Impedance Tomography (EIT 2014). International Steering Committee on Electrical Impedance Tomography.