Rwm. Smith et al., A REAL-TIME ELECTRICAL-IMPEDANCE TOMOGRAPHY SYSTEM FOR CLINICAL USE -DESIGN AND PRELIMINARY-RESULTS, IEEE transactions on biomedical engineering, 42(2), 1995, pp. 133-140
An instrument is described which produces images of the electrical imp
edance distribution within the body at a rate of 25 frames per second,
allowing lung ventilation and lung perfusion to be observed in real t
ime. The instrument makes impedance measurements using an array of 16
electrodes on the surface of the body, and reconstructs the images usi
ng a weighted backprojection technique. The design of the data acquisi
tion electronics and the reconstruction and display processor are desc
ribed. Some preliminary in vitro and in vivo results from the system a
re presented.