Universität zu Köln

Gassenmaier, Tobias, Petri, Nils, Allmendinger, Thomas, Flohr, Thomas, Maintz, David, Voelker, Wolfram and Bley, Thorsten A. (2014). Next generation coronary CT angiography: in vitro evaluation of 27 coronary stents. Eur. Radiol., 24 (11). S. 2953 - 2962. NEW YORK: SPRINGER. ISSN 1432-1084

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Abstract

To evaluate in-stent lumen visibility of 27 modern and commonly used coronary stents (16 individual stent types, two stents at six different sizes each) utilising a third-generation dual-source CT system. Stents were implanted in a plastic tube filled with contrast. Examinations were performed parallel to the system's z-axis for all stents (i.e. 0A degrees) and in an orientation of 90A degrees for stents with a diameter of 3.0 mm. Two stents were evaluated in different diameters (2.25 to 4.0 mm). Examinations were acquired with a collimation of 96 x 0.6 mm, tube voltage of 120 kVp with 340 mAs tube current. Evaluation was performed using a medium-soft (Bv40), a medium-sharp (Bv49) and a sharp (Bv59) convolution kernel optimised for vascular imaging. Mean visible stent lumen of stents with 3.0 mm diameter ranged from 53.3 % (IQR 48.9 -aEuro parts per thousand 56.7 %) to 73.9 % (66.7 -aEuro parts per thousand 76.7 %), depending on the kernel used at 0A degrees, and was highest at an orientation of 90A degrees with 80.0 % (75.6 -aEuro parts per thousand 82.8 %) using the Bv59 kernel, strength 4. Visible stent lumen declined with decreasing stent size. Use of third-generation dual-source CT enables stent lumen visibility of up to 80 % in metal stents and 100 % in bioresorbable stents. aEuro cent Blooming artefacts impair in-stent lumen visibility of coronary stents in CT angiography. aEuro cent CT enables stent lumen visibility of up to 80 % in metal stents. aEuro cent Stent lumen visibility varies with stent orientation and size. aEuro cent CT angiography may be a valid alternative for detecting in-stent restenosis.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Gassenmaier, Tobias UNSPECIFIED UNSPECIFIED UNSPECIFIED Petri, Nils UNSPECIFIED UNSPECIFIED UNSPECIFIED Allmendinger, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Flohr, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Maintz, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Voelker, Wolfram UNSPECIFIED UNSPECIFIED UNSPECIFIED Bley, Thorsten A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-424871
DOI:	10.1007/s00330-014-3323-6
Journal or Publication Title:	Eur. Radiol.
Volume:	24
Number:	11
Page Range:	S. 2953 - 2962
Date:	2014
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1432-1084
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COMPUTED-TOMOGRAPHY ANGIOGRAPHY; DUAL-SOURCE CT; ARTERY STENTS; RESTENOSIS; PERFORMANCE; TRIAL Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/42487