A parallel broadband real-time system for electrical impedance tomography.
This paper deals with the design, implementation and performance of TIE-4sys, an electrical impedance tomograph. This instrument is a parallel broad-band real-time system. It measures impedance using an array of 16 electrodes and reconstructs the images using a weighted back-projection technique. The objective of this development is to enable multifrequency EIT clinical studies to be undertaken. The system is capable of acquiring 25 frames/s and makes multifrequency cardiac-gated images. The frequency range is from 10 kHz to 250 kHz and the signal to noise ratio for the real component is better than 60 dB.
Casas
O
O
Department d'Enginyeria Electrònica, Universitat Politècnica de Catalunya, Barcelona, Spain.
Rosell
J
J
Bragós
R
R
Lozano
A
A
Riu
P J
PJ
D017097:Electric Impedance; D004566:Electrodes; D004582:Electronics, Medical / Q000295:instrumentation; D004867:Equipment Design; D006321:Heart / Q000502:physiology; D006801:Humans; D014054:Tomography / Q000295:instrumentation*