LabVIEW based Automatic Data acquisition system for Electrical Impedance Tomography

Abstract — Electrical Impedance Tomography (EIT) is developing and promising imaging modality for early detection of breast cancer. An EIT system uses an array of surface electrode to apply current to an imaging object & measures the resulting voltages on the periphery. The measurement results are then input to a reconstruction algorithm to produce an image of impedance distribution of the object. In this study a LabVIEW based automatic data acquisition system is designed. In this Data Acquisition system input current injection and voltage measurement are carried out using switching. An Electrode Switching Network (ESN) consist of four 16:1 analog multiplexers that are used for swiching. The electrode switching network is controlled by Virtual Instrument (VI) developed in LabVIEW. The NI myDAQ DAQ card is used to interface PC with other hardware