Document Detail


The dependence of EIT images on the assumed initial conductivity distribution: a study of pelvic imaging.
MedLine Citation:
PMID:  7610119     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
EIT measurements on humans are often made in regions of the body where the conductivity distribution is far from uniform. This paper addresses the problem of deriving accurate quantitative data in one such region: the conductivity changes associated with the accumulation of blood in the pelvic bowl. A computer map of the bone in the pelvic region was constructed, from which an appropriate reconstruction matrix was generated. Both computer simulations and tank tests were performed to assess whether this bone reconstruction matrix produced impedance images with closer fidelity to the measured object than images produced using a reconstruction based on a uniform conductivity distribution. As expected, images produced by the computer simulation indicated that the bone reconstruction matrix produced images of better fidelity than did the uniform reconstruction matrix. However, in the case of the tank data only a moderate improvement was achieved. The reconstruction matrix based on a uniform conductivity distribution was found to produce satisfactory images for both bone and near-uniform objects, but for regions further into the pelvic bowl, where the signal was lower, the uniform reconstruction matrix was less satisfactory.
Authors:
S Meeson; A L Killingback; B H Blott
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Physics in medicine and biology     Volume:  40     ISSN:  0031-9155     ISO Abbreviation:  Phys Med Biol     Publication Date:  1995 Apr 
Date Detail:
Created Date:  1995-08-16     Completed Date:  1995-08-16     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0401220     Medline TA:  Phys Med Biol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  643-57     Citation Subset:  IM    
Affiliation:
Department of Physics, University of Southampton, UK.
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MeSH Terms
Descriptor/Qualifier:
Computer Simulation
Humans
Models, Structural*
Pelvic Bones / anatomy & histology
Pelvis*
Tomography*

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


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