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Reproducibility of quantitative assessment of altered hepatic hemodynamics with dynamic contrast-enhanced ultrasound.
MedLine Citation:
PMID:  22922621     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Objectives- The aim of this clinical study was to evaluate the reproducibility of quantitative assessment of altered hepatic hemodynamics with dynamic contrast-enhanced ultrasound. Methods- Fifteen patients with colorectal liver metastases and 5 volunteers were studied. The hepatic artery proper and the portal vein were imaged simultaneously with dynamic contrast-enhanced ultrasound. The examination was repeated with 2 different contrast bolus volumes (1.2 and 2.4 mL), and time-intensity curves were formed from dynamic contrast-enhanced ultrasound image loops. The rise time, peak intensity, and wash-in slope were derived from hepatic artery and portal vein time-intensity curves. Inter-reader, intra-reader, and inter-scan agreement was assessed by 2 independent readers. Quantitative (intraclass correlation coefficients and coefficients of variation [CVs]) and qualitative (Landis and Koch classification) analyses were performed. Results- Intra-reader and inter-reader agreement was "almost perfect" for the hepatic artery (CV, 10%-15% and 8%-9%, respectively), portal vein (CV, 5%-8% and 6%-12%), and hepatic artery/portal vein ratio (CV, 8%-14% and 10%-15%) measurements of 3 all studied parameters. In contrast, inter-scan agreement was only "slight" to "moderate" (CV, 25%-27%) and "fair" to "moderate" (CV, 19%-24%) for rise time and peak intensity measurements in the hepatic artery and portal vein, respectively. Conclusions- Quantitative assessment of altered hepatic hemodynamics with dynamic contrast-enhanced ultrasound is reproducible provided that measurements in the hepatic artery are normalized by those in the portal vein.
Authors:
Thomas P Gauthier; Aun Muhammad; Harpreet S Wasan; Paul D Abel; Edward L S Leen
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine     Volume:  31     ISSN:  1550-9613     ISO Abbreviation:  J Ultrasound Med     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-08-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8211547     Medline TA:  J Ultrasound Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1413-20     Citation Subset:  IM    
Affiliation:
MS, c/o Edward L. S. Leen, Department of Medicine, Division of Experimental Medicine, Faculty of Medicine, Imperial College London, Hammersmith Hospital, Du Cane Road, London W12 0NN, England. thomas.gauthier@gmail.com.
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