Document Detail


A simple method to check the dynamic performance of electrical impedance tomography systems.
MedLine Citation:
PMID:  10719999     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The test concept as well as the design of a simple resistor phantom suitable for the evaluation of the properties of electrical impedance tomographic (EIT) systems is presented. Input and transfer impedance of the phantom are matched with those of the human thorax. Amplitude of the local impedance variations similar to in vivo conditions (ventilation) can be intentionally set to perform measurements on different states. The theoretical potential differences between the electrodes are calculated. The evaluation procedure is performed in terms of the local amplitude of the relative impedance change as well as the local distribution of noise. The whole procedure can be applied either to compare quantitatively the performance of different EIT data acquisition systems or to determine the amount of measurement disturbance caused by the external electrical environment in clinical settings.
Authors:
G Hahn; M Beer; I Frerichs; T Dudykevych; T Schröder; G Hellige
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physiological measurement     Volume:  21     ISSN:  0967-3334     ISO Abbreviation:  Physiol Meas     Publication Date:  2000 Feb 
Date Detail:
Created Date:  2000-04-21     Completed Date:  2000-04-21     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9306921     Medline TA:  Physiol Meas     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  53-60     Citation Subset:  IM    
Affiliation:
Department of Anaesthesiological Research, Centre of Anaesthesiology, Emergency and Intensive Care Medicine, University of Göttingen, Germany. ghahn@gwdg.de
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MeSH Terms
Descriptor/Qualifier:
Cardiography, Impedance / instrumentation,  statistics & numerical data
Electric Impedance*
Evaluation Studies as Topic
Humans
Image Processing, Computer-Assisted
Phantoms, Imaging
Thorax / anatomy & histology
Tomography / instrumentation*,  statistics & numerical data

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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