CT angiography helps to differentiate acute from chronic carotid occlusion: "carotid ring sign".

Détails

Ressource 1Télécharger: serval:BIB_C5D00F02F859.P001 (376.14 [Ko])
Etat: Public
Version: de l'auteur
Licence: Non spécifiée
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ID Serval
serval:BIB_C5D00F02F859
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
CT angiography helps to differentiate acute from chronic carotid occlusion: "carotid ring sign".
Périodique
Neuroradiology
Auteur(s)
Michel P., Ntaios G., Delgado M.G., Bezerra D.C., Meuli R., Binaghi S.
ISSN
1432-1920 (Electronic)
ISSN-L
0028-3940
Statut éditorial
Publié
Date de publication
2012
Peer-reviewed
Oui
Volume
54
Numéro
2
Pages
139-146
Langue
anglais
Notes
Publication types: Journal Article
Résumé
INTRODUCTION: Currently, there is no reliable method to differentiate acute from chronic carotid occlusion. We propose a novel CTA-based method to differentiate acute from chronic carotid occlusions that could potentially aid clinical management of patients. METHODS: We examined 72 patients with 89 spontaneously occluded extracranial internal carotids with CT angiography (CTA). All occlusions were confirmed by another imaging modality and classified as acute (imaging <1 week of presumed occlusion) orchronic (imaging >4 weeks), based on circumstantial clinical and radiological evidence. A neuroradiologist and a neurologist blinded to clinical information determined the site of occlusion on axial sections of CTA. They also looked for (a) hypodensity in the carotid artery (thrombus), (b) contrast within the carotid wall (vasa vasorum), (c) the site of the occluded carotid, and (d) the "carotid ring sign" (defined as presence of a and/or b). RESULTS: Of 89 occluded carotids, 24 were excluded because of insufficient circumstantial evidence to determine timing of occlusion, 4 because of insufficient image quality, and 3 because of subacute timing of occlusion. Among the remaining 45 acute and 13 chronic occlusions, inter-rater agreement (kappa) for the site of proximal occlusion was 0.88, 0.45 for distal occlusion, 0.78 for luminal hypodensity, 0.82 for wall contrast, and 0.90 for carotid ring sign. The carotid ring sign had 88.9% sensitivity, 69.2% specificity, and 84.5% accuracy to diagnose acute occlusion. CONCLUSION: The carotid ring sign helps to differentiate acute from chronic carotid occlusion. If further confirmed, this information may be helpful in studying ischemic symptoms and selecting treatment strategies in patients with carotid occlusions.
Pubmed
Web of science
Open Access
Oui
Création de la notice
06/09/2011 10:46
Dernière modification de la notice
01/10/2019 6:19
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