Title :
Evaluation of a commercial impedance spectroscopy instrument: inaccuracies and their corrections
Author :
Patterson, Robert ; Latterell, Todd
Author_Institution :
Minnesota Univ., Minneapolis, MN, USA
Abstract :
The accuracy of the Xitron bio-impedance spectrum analyzer was evaluated over a measurement range of 56 to 626 ohms and using lead resistances from 50 to 600 ohms to simulate electrode impedance (Z). Phase errors without lead resistances were up to 14.9°. Lead impedance could add up to an additional 4° error. Although errors of this size could cause serious problems, it appears that by using low impedance electrodes and software corrections of the data significant improvement can be obtained
Keywords :
biomedical equipment; biomedical measurement; electric impedance measurement; measurement errors; spectroscopy; 50 to 626 ohm; commercial impedance spectroscopy instrument; complex tissue impedance; electrode impedance; instrument inaccuracies; lead resistances; medical instrumentation; phase errors; software corrections; tissue characteristics determination; Costs; Electrical resistance measurement; Electrochemical impedance spectroscopy; Electrodes; Frequency; Instruments; Phase measurement; Resistors; Spectral analysis; USA Councils;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.575295
