DocumentCode
1221857
Title
An Impedance Camera for Spatially Specific Measurements of the Thorax
Author
Henderson, Ross P. ; Webster, John G.
Author_Institution
Department of Electrical and Computer Engineering, University of Wisconsin-Madison
Issue
3
fYear
1978
fDate
5/1/1978 12:00:00 AM
Firstpage
250
Lastpage
254
Abstract
We have designed and built an impedance camera to generate electrical impedance images of the thorax. Our instrument makes 100 spatially specific admittance measurements per frame at rates up to 32 frames per second. An on-line raster-scan display provides direct visualization while recording of data allows off-line quantitative analysis. We have found that some of the admittance measurements change 25% in humans with forced respiration. We discuss the principle of a mutually guarding electrode array and its limitations and present ideal instrument specifications and a working design. Continuing development may allow noninvasive measurement of localized ventilation and perfusion.
Keywords
Admittance measurement; Cameras; Data visualization; Displays; Electrodes; Humans; Image generation; Impedance measurement; Instruments; Thorax; Body Fluids; Electric Conductivity; Humans; Lung; Respiration; Thorax;
fLanguage
English
Journal_Title
Biomedical Engineering, IEEE Transactions on
Publisher
ieee
ISSN
0018-9294
Type
jour
DOI
10.1109/TBME.1978.326329
Filename
4122822
Link To Document