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ID 52794
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Author
Itami, Hisakazu
Tokunaga, Koji
Okuma, Yu
Hishikawa, Tomohito Kakenhi
Sugiu, Kenji Kakenhi
Abstract
Although self-expanding carotid stents may dilate gradually, the degrees of residual stenosis have been quantified by the NASCET criteria, which is too simple to reflect the configuration of the stented artery. We measured the volumes of the stent lumens chronologically by 3D-CT in patients after carotid artery stenting (CAS), and analyzed the correlations between the volume change and medical factors. Fourteen patients with carotid artery stenosis were treated using self-expanding, open-cell stents. All patients underwent preoperative plaque MRI (magnetization-prepared rapid acquisition gradient-echo, MPRAGE) and chronological 3D-CT examinations of their stents immediately after their placement and 1 day, 1 week, and 1 month after the procedure. The volume of the stent lumen was measured using a 3D workstation. The correlations between stent volume and various factors including the presence of underlying diseases, plaque characteristics, and the results of the CAS procedure were analyzed. Stent volume gradually increased in each case and had increased by 1.04-1.55 (mean, 1.25)-fold at 1 postoperative month. The presence of underlying medical diseases, plaque length, the degree of residual stenosis immediately after CAS, and plaque calcification did not have an impact on the change in stent volume. On the other hand, the stent volume increase was significantly larger in the patients with vulnerable plaques that demonstrated high MPRAGE signal intensity (P < 0.05). A 3D-CT examination is useful for precisely measuring stent volume. Self-expanding stents in carotid arteries containing vulnerable plaques expand significantly more than those without such plaques in a follow-up period.
Keywords
Carotid artery stenting
Carotid stenosis
Plaque MRI
3D-CT
Published Date
2013-09
Publication Title
Neuroradiology
Volume
volume55
Issue
issue9
Start Page
1153
End Page
1160
ISSN
0028-3940
Content Type
Journal Article
Related Url
http://ousar.lib.okayama-u.ac.jp/metadata/52517
language
英語
File Version
author
Refereed
True
DOI
Web of Sience KeyUT