| The Frequency of Insufficient Contrast Enhancement of the Pulmonary Artery in Routine Contrast-enhanced Chest CT and Its Improvement With an Increased Injection Rate: A Prospective Study. | |
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MedLine Citation:
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PMID: 20463614 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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PURPOSE: To evaluate the frequency of insufficient contrast enhancement of the pulmonary artery (PA) during chest computed tomography (CT) and its improvement by an increased injection rate. MATERIALS AND METHODS: Two hundred and eighty-eight (group A) and 278 (group B) consecutive patients underwent chest CT with the administration of 100 mL of a 300-mgI/mL nonionized contrast material through the antecubital vein using a power injector. The flow rate was 2 mL/s in group A and 3 mL/s in group B, and 50 mL saline was administered simultaneously using a dual injector. The scan delay was 30 s in both groups. The CT numbers in the pulmonary trunk, bilateral main PA, left atrium, and ascending and descending aortas were measured. Insufficient enhancement of the PA was defined as a CT number of the pulmonary trunk ≤180 HU. RESULTS: Insufficient enhancement of the PA was observed in 21 of 288 patients (7.3%) in group A, whereas it was seen in only 9 of 278 patients (3.2%) in group B (P=0.038). CONCLUSIONS: The use of a flow rate of 3 mL/s is associated with a significantly lower frequency of insufficient contrast enhancement of the PA, compared with the use of a lower flow rate of 2 mL/s with the same total volume of contrast. |
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Authors:
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Yoshiyuki Ozawa; Masaki Hara; Yuta Shibamoto |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of thoracic imaging Volume: 26 ISSN: 1536-0237 ISO Abbreviation: J Thorac Imaging Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-01-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8606160 Medline TA: J Thorac Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 42-7 Citation Subset: IM |
Affiliation:
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Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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