Document Detail

Dual-phase CT angiography of the normal canine portal and hepatic vasculature.
MedLine Citation:
PMID:  15072142     Owner:  NLM     Status:  MEDLINE    
A dual-phase computed tomography (CT) angiographic technique was developed to image the hepatic and portal vascular systems using a nonselective peripheral injection of contrast medium. The arterial phase of the dual-phase scan imaged the hepatic arteries and veins, and the portal phase imaged the portal vein as well as its tributaries and branches. There were three steps involved in acquiring the dual-phase scan: a survey helical scan for orientation, a dynamic scan for timing, and finally the dual-phase helical scan. Five normal dogs were imaged using a helical scan technique. The timing of the arterial and portal phases of the scan was calculated using time vs. attenuation graphs generated from a dynamic scan. The median time of appearance of contrast medium in the cranial abdominal aorta was 8.6 s and the median time of appearance of contrast medium in the hepatic artery occurred 0.4 s later. The median time of peak enhancement in the cranial abdominal aorta was 12.0 s. The median time of appearance of contrast medium in the portal vein was 14.6 s and median time of peak enhancement was 33.0 s. The dual-phase scans provided excellent vascular opacification. The hepatic arteries, hepatic veins, cranial and caudal mesenteric veins, splenic vein, gastroduodenal vein, and portal vein branches were all consistently well defined. Dual-phase CT angiography is a minimally invasive technique which provides an excellent three-dimensional representation of portal and hepatic vascular anatomy.
Allison L Zwingenberger; Tobias Schwarz
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association     Volume:  45     ISSN:  1058-8183     ISO Abbreviation:  Vet Radiol Ultrasound     Publication Date:    2004 Mar-Apr
Date Detail:
Created Date:  2004-04-09     Completed Date:  2004-05-13     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  9209635     Medline TA:  Vet Radiol Ultrasound     Country:  United States    
Other Details:
Languages:  eng     Pagination:  117-24     Citation Subset:  IM    
Department of Clinical Studies, School of Veterinary Medicine. University of Pennsylvania, 3900 Delancey Street, Philadelphia, PA 19104-6010, USA.
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MeSH Terms
Angiography / veterinary
Aorta, Thoracic / anatomy & histology
Contrast Media
Dogs / anatomy & histology*
Hepatic Artery / anatomy & histology
Hepatic Veins / anatomy & histology
Liver / blood supply*,  radiography
Portal Vein / anatomy & histology
Reference Values
Tomography, X-Ray Computed / veterinary
Grant Support
Reg. No./Substance:
0/Contrast Media

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

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