Document Detail

Improved aortic enhancement in CT angiography using slope-based triggering with table speed optimization: a pilot study.
MedLine Citation:
PMID:  21898186     Owner:  NLM     Status:  Publisher    
To assess whether a scan triggering technique based on the slope of the time-attenuation curve combined with table speed optimization may improve arterial enhancement in aortic CT angiography compared to conventional threshold-based triggering techniques. Measurements of arterial enhancement were performed in a physiologic flow phantom over a range of simulated cardiac outputs (2.2-8.1 L/min) using contrast media boluses of 80 and 150 mL injected at 4 mL/s. These measurements were used to construct computer models of aortic attenuation in CT angiography, using cardiac output, aortic diameter, and CT table speed as input parameters. In-plane enhancement was calculated for normal and aneurysmal aortic diameters. Calculated arterial enhancement was poor (<150 HU) along most of the scan length using the threshold-based triggering technique for low cardiac outputs and the aneurysmal aorta model. Implementation of the slope-based triggering technique with table speed optimization improved enhancement in all scenarios and yielded good- (>200 HU; 13/16 scenarios) to excellent-quality (>300 HU; 3/16 scenarios) enhancement in all cases. Slope-based triggering with table speed optimization may improve the technical quality of aortic CT angiography over conventional threshold-based techniques, and may reduce technical failures related to low cardiac output and slow flow through an aneurysmal aorta.
Mustafa R Bashir; Paul W Weber; Daniela B Husarik; Laurens E Howle; Rendon C Nelson
Related Documents :
20226476 - Transapical mitral valved stent implantation: a survival series in swine.
11175046 - Serial doppler gradients are predictive of future bioprosthetic valve degeneration.
7795376 - Multiplane transesophageal echocardiographic evaluation of mitral valve disease.
7623236 - Valve replacement for children: report of two cases.
10496506 - Primary cardiac angiosarcoma with right coronary artery-to-pericardial fistula--a case ...
20407386 - Complementary role of cardiac computed tomography and doppler-echocardiography in the e...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-9-7
Journal Detail:
Title:  The international journal of cardiovascular imaging     Volume:  -     ISSN:  1875-8312     ISO Abbreviation:  -     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-9-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100969716     Medline TA:  Int J Cardiovasc Imaging     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Radiology, Duke University Medical Center, Duke North, Room 1508F, Erwin Road, Durham, NC, 27710, USA,
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

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

Previous Document:  Surgery in the sitting position : Anesthesiological considerations.
Next Document:  Molecular characterization and complete genome analysis of human enterovirus 71 and coxsackievirus A...