Coronary artery stent geometry and in-stent contrast attenuation with 64-slice computed tomography

Schepis, Tiziano; Koepfli, Pascal; Leschka, Sebastian; Desbiolles, Lotus; Husmann, Lars; Gaemperli, Oliver; Eberli, Franz R; Wildermuth, Simon; Marincek, Borut; Lüscher, Thomas F; Alkadhi, Hatem; Kaufmann, Philipp A (2007). Coronary artery stent geometry and in-stent contrast attenuation with 64-slice computed tomography. European radiology, 17(6), pp. 1464-73. Berlin: Springer 10.1007/s00330-006-0502-0

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Cardiovascular Disorders (DHGE) > Clinic of Cardiology

UniBE Contributor:

Eberli, Franz

ISSN:

0938-7994

ISBN:

17206429

Publisher:

Springer

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:55

Last Modified:

04 May 2014 23:16

Publisher DOI:

10.1007/s00330-006-0502-0

PubMed ID:

17206429

Web of Science ID:

000246385000009

URI:

https://boris.unibe.ch/id/eprint/23236 (FactScience: 40670)

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