| EFFECT OF CONTRAST MEDIUM INJECTION DURATION ON PEAK ENHANCEMENT AND TIME TO PEAK ENHANCEMENT OF CANINE PULMONARY ARTERIES. | |
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MedLine Citation:
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PMID: 21831249 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Our goal was to investigate the effect of contrast medium injection duration on pulmonary artery peak enhancement and time to peak enhancement. Fourteen dogs were allocated into one of seven predefined weight categories, each category contained two dogs. Dogs in each weight category were assigned to group A or B. Animals in each group received a different contrast medium injection protocol. In group A, a fixed injection rate of 5 ml/s was used. In group B, the contrast injection rate was calculated as follows: flow rate=contrast volume/scan duration+10 s. Time to peak enhancement and peak enhancement of the main left and right pulmonary arteries were measured on single-level, dynamic CT images for a fixed time of 30 s. Rank correlation (Spearman's) coefficients between injection duration and time to peak enhancement and between body weight and peak enhancement were calculated. For group A, there was a significant negative correlation between peak enhancement and weight (r=-0.94; P=0.005), while for group B, there was no significant correlation (r=-0.64 and P=0.18). There was a significant correlation between time to peak enhancement and injection duration in both groups (group A: r=0.99; P=0.006 and group B: r=0.85; P=0.02). In conclusion, injection duration is a key feature in a CT angiography injection protocol. A protocol with an injection duration adjusted to the scan duration seems to be particularly suitable for veterinary applications where a population with great weight variability is studied. |
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Authors:
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Mariano Makara; Matthias Dennler; Karolin Kühn; Karin Kalchofner; Patrick Kircher |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-10 |
Journal Detail:
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Title: Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association Volume: - ISSN: 1058-8183 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-8-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9209635 Medline TA: Vet Radiol Ultrasound Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2011 Veterinary Radiology & Ultrasound. |
Affiliation:
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Section of Diagnostic Imaging, Vetsuisse Faculty University of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland Section of Anaesthesiology, Vetsuisse Faculty University of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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