Universität zu Köln

Hickethier, Tilman, Wenning, Justus, Doerner, Jonas, Maintz, David, Michels, Guido and Bunck, Alexander C. (2018). Fourth update on CT angiography of coronary stents: invitro evaluation of 24 novel stent types. Acta Radiol., 59 (9). S. 1060 - 1066. LONDON: SAGE PUBLICATIONS LTD. ISSN 1600-0455

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Abstract

Background: Non-invasive evaluation of coronary stent patency by coronary computed tomography angiography (cCTA) remains challenging. Multiple studies showed that CT technology but also individual stent design strongly influence the assessability of coronary stents by cCTA. Purpose: To expand the available data on cCTA characteristics of coronary stents by 24 novel types to help interpreting examinations of patients after stent placement and selecting which stents are suitable for assessment by cCTA. Material and Methods: Twenty-four novel coronary stents (17 cobalt-chromium, six stainless-steel, one platinum-chromium) were examined in a coronary phantom. Standard cCTA parameters with stent-specific algorithms were used. Image quality was quantified for each stent using established parameters (in-stent attenuation alteration and visible lumen diameter). Results: Most stents (n=14) showed lumen visibilities of 45-55%. No severe restriction of lumen visibility (>60%) was found. The majority of stents (n=13) caused only small intraluminal attenuation deviations and no severe alterations (>20%) were found. When grouped by manufacturing material, no significant differences were found between cobalt-chromium and stainless-steel with identical mean visible diameters (1.520.17mm vs. 1.52 +/- 0.13mm) and comparable attenuation alterations (35.04 +/- 16.56 HU vs. 21.25 +/- 14.60 HU). The only platinum-chromium stent showed a smaller visible diameter (1.23mm) and higher attenuation alteration (41.70 HU), but was also deemed to be assessable by cCTA. Conclusion: All 24 novel evaluated stents are eligible for non-invasive evaluation by cCTA without significant differences between cobalt-chromium and stainless-steel stents. This updated catalogue of CT appearances of current coronary stents may serve as reference when taking care of patients with stents in need of coronary imaging.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hickethier, Tilman UNSPECIFIED UNSPECIFIED UNSPECIFIED Wenning, Justus UNSPECIFIED UNSPECIFIED UNSPECIFIED Doerner, Jonas UNSPECIFIED UNSPECIFIED UNSPECIFIED Maintz, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Michels, Guido UNSPECIFIED UNSPECIFIED UNSPECIFIED Bunck, Alexander C. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-175875
DOI:	10.1177/0284185117744227
Journal or Publication Title:	Acta Radiol.
Volume:	59
Number:	9
Page Range:	S. 1060 - 1066
Date:	2018
Publisher:	SAGE PUBLICATIONS LTD
Place of Publication:	LONDON
ISSN:	1600-0455
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DUAL-SOURCE CT; MULTISLICE COMPUTED-TOMOGRAPHY; ARTERY STENTS; XIENCE PHANTOM; EXPERIENCE; RECONSTRUCTIONS; RESTENOSIS; DETECTOR; PATENCY; MM Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17587