Document Detail

Elastographic versus x-ray CT imaging of radio frequency ablation coagulations: an in vitro study.
MedLine Citation:
PMID:  15259635     Owner:  NLM     Status:  MEDLINE    
Techniques to image elasticity parameters (i.e., elastography) have recently become of great interest to researchers. In this paper we use conventional ultrasound elastography and x-ray CT to image radio frequency (RF) ablation sites of excised canine liver enclosed in gelatin. Thermal coagulations of different sizes were produced by applying the RF procedure for various times and end point temperatures. Dimensions, areas and volumes computed from CT and elastography were compared with those on whole mount pathology specimens. Ultrasound elastography exhibited high contrast for the thermal coagulations and performed better than CT. The correlation between pathology and elastography for this sample set of 40 thermal coagulations (r = 0.94 for volume estimation, r = 0.87 for area estimation) is better than the correlation between pathology and CT (r = 0.89 for volume estimation, r = 0.82 for area estimation).
Wu Liu; Udomchai Techavipoo; Tomy Varghese; James A Zagzebski; Quan Chen; Fred T Lee
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Publication Detail:
Type:  Comparative Study; In Vitro; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Medical physics     Volume:  31     ISSN:  0094-2405     ISO Abbreviation:  Med Phys     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-07-19     Completed Date:  2005-01-14     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0425746     Medline TA:  Med Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1322-32     Citation Subset:  IM    
Department of Medical Physics, University of Wisconsin-Madison, 1300 University Avenue, 1530 MSC, Madison, Wisconsin 53706, USA.
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MeSH Terms
Biophysical Phenomena
Catheter Ablation*
Liver / surgery,  ultrasonography
Phantoms, Imaging
Tomography, X-Ray Computed*
Ultrasonography / methods*
Grant Support

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