Impact of metal artifact reduction software on image quality of gemstone spectral imaging dual-energy cerebral CT angiography after intracranial aneurysm clipping.

Détails

ID Serval
serval:BIB_622A6FB5EF6C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Impact of metal artifact reduction software on image quality of gemstone spectral imaging dual-energy cerebral CT angiography after intracranial aneurysm clipping.
Périodique
Neuroradiology
Auteur(s)
Dunet V., Bernasconi M., Hajdu S.D., Meuli R.A., Daniel R.T., Zerlauth J.B.
ISSN
1432-1920 (Electronic)
ISSN-L
0028-3940
Statut éditorial
Publié
Date de publication
09/2017
Peer-reviewed
Oui
Volume
59
Numéro
9
Pages
845-852
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
We aimed to assess the impact of metal artifact reduction software (MARs) on image quality of gemstone spectral imaging (GSI) dual-energy (DE) cerebral CT angiography (CTA) after intracranial aneurysm clipping.
This retrospective study was approved by the institutional review board, which waived patient written consent. From January 2013 to September 2016, single source DE cerebral CTA were performed in 45 patients (mean age: 60 ± 9 years, male 9) after intracranial aneurysm clipping and reconstructed with and without MARs. Signal-to-noise (SNR), contrast-to-noise (CNR), and relative CNR (rCNR) ratios were calculated from attenuation values measured in the internal carotid artery (ICA) and middle cerebral artery (MCA). Volume of clip and artifacts and relative clip blurring reduction (rCBR) ratios were also measured at each energy level with/without MARs. Variables were compared between GSI and GSI-MARs using the paired Wilcoxon signed-rank test.
MARs significantly reduced metal artifacts at all energy levels but 130 and 140 keV, regardless of clips' location and number. The optimal rCBR was obtained at 110 and 80 keV, respectively, on GSI and GSI-MARs images, with up to 96% rCNR increase on GSI-MARs images. The best compromise between metal artifact reduction and rCNR was obtained at 70-75 and 65-70 keV for GSI and GSI-MARs images, respectively, with up to 15% rCBR and rCNR increase on GSI-MARs images.
MARs significantly reduces metal artifacts on DE cerebral CTA after intracranial aneurysm clipping regardless of clips' location and number. It may be used to reduce radiation dose while increasing CNR.
Mots-clé
Artifacts, Cerebral Angiography/methods, Computed Tomography Angiography/methods, Female, Humans, Intracranial Aneurysm/diagnostic imaging, Intracranial Aneurysm/surgery, Male, Metals, Middle Aged, Radiographic Image Interpretation, Computer-Assisted/methods, Retrospective Studies, Software, Aneurysm clipping, CT angiography, Dual-energy CT, Metal artifact reduction software, Reconstruction
Pubmed
Web of science
Création de la notice
07/08/2017 14:37
Dernière modification de la notice
20/08/2019 14:19
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