Title :
A 2 MHz wide band full wave distributed impedance tomograph
Author :
Jossinet, J. ; Tourtel, C. ; Risacher, F.
Author_Institution :
Inst. Nat. de la Sante et de la Recherche Med., Lyon, France
Abstract :
A wide band, multi-frequency data electrical impedance tomograph was constructed for the simultaneous measurement of both the real and imaginary components of a tissue´s impedance in the range 32 kHz to 2.048 MHz. The use of independent groups of electrodes for current injection and voltage measurements and floating voltmeter enable the minimization of the measurement errors, which usually increase with the applied signal frequency. This device enables the full determination of impedance loci in body tissues´ β-dispersion frequency range
Keywords :
biomedical equipment; electric impedance imaging; β-dispersion frequency range; 2 MHz wide band full wave distributed impedance tomograph; 32 kHz to 2.048 MHz; applied signal frequency; body tissues; current injection; electrode groups; floating voltmeter; impedance imaginary component; impedance loci determination; impedance real component; measurement errors minimisation; medical diagnostic imaging; medical instrumentation; multifrequency data electrical impedance tomograph; Circuits; Demodulation; Dielectrics; Electric variables measurement; Electrodes; Frequency; Impedance measurement; Measurement errors; Signal generators; Voltage; Voltage measurement; Voltmeters; Wideband;
Conference_Titel :
Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2050-6
DOI :
10.1109/IEMBS.1994.411912
