A fast EIT system applied to a linear array

Electrical impedance tomography (EIT) is frequently used to image temporal changes in conductivity and in such applications measurement time is an important parameter. This paper describes a high-speed, injected current EIT system which uses a novel technique to reduce the measurement time. The total time required to perform the measurements necessary to produce an image is 2ms. The system uses separate sets of electrodes for injecting currents and sensing voltages and has been applied to a linear array of electrodes, rather than the more common encircling array, although it is not limited to such a geometry.