Document Detail

Coronary artery stent geometry and in-stent contrast attenuation with 64-slice computed tomography.
MedLine Citation:
PMID:  17206429     Owner:  NLM     Status:  MEDLINE    
We aimed at assessing stent geometry and in-stent contrast attenuation with 64-slice CT in patients with various coronary stents. Twenty-nine patients (mean age 60 +/- 11 years; 24 men) with 50 stents underwent CT within 2 weeks after stent placement. Mean in-stent luminal diameter and reference vessel diameter proximal and distal to the stent were assessed with CT, and compared to quantitative coronary angiography (QCA). Stent length was also compared to the manufacturer's values. Images were reconstructed using a medium-smooth (B30f) and sharp (B46f) kernel. All 50 stents could be visualized with CT. Mean in-stent luminal diameter was systematically underestimated with CT compared to QCA (1.60 +/- 0.39 mm versus 2.49 +/- 0.45 mm; P < 0.0001), resulting in a modest correlation of QCA versus CT (r = 0.49; P < 0.0001). Stent length as given by the manufacturer was 18.2 +/- 6.2 mm, correlating well with CT (18.5 +/- 5.7 mm; r = 0.95; P < 0.0001) and QCA (17.4 +/- 5.6 mm; r = 0.87; P < 0.0001). Proximal and distal reference vessel diameters were similar with CT and QCA (P = 0.06 and P = 0.03). B46f kernel images showed higher image noise (P < 0.05) and lower in-stent CT attenuation values (P < 0.001) than images reconstructed with the B30f kernel. 64-slice CT allows measurement of coronary artery in-stent density, and significantly underestimates the true in-stent diameter compared to QCA.
Tiziano Schepis; Pascal Koepfli; Sebastian Leschka; Lotus Desbiolles; Lars Husmann; Oliver Gaemperli; Franz R Eberli; Simon Wildermuth; Borut Marincek; Thomas F Lüscher; Hatem Alkadhi; Philipp A Kaufmann
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-01-06
Journal Detail:
Title:  European radiology     Volume:  17     ISSN:  0938-7994     ISO Abbreviation:  Eur Radiol     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-05-11     Completed Date:  2007-09-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9114774     Medline TA:  Eur Radiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1464-73     Citation Subset:  IM    
Cardiovascular Center, University Hospital Zurich, Raemistr. 100, CH-8091 Zurich, Switzerland.
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MeSH Terms
Aged, 80 and over
Analysis of Variance
Coronary Disease / radiography*,  therapy*
Middle Aged
Prosthesis Design
Radiographic Image Interpretation, Computer-Assisted
Tomography, X-Ray Computed / methods*
Treatment Outcome

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