Model-based iterative reconstruction in pediatric chest CT: assessment of image quality in a prospective study of children with cystic fibrosis.

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Version: Final published version
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ID Serval
serval:BIB_CF0D25C4BB2E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Model-based iterative reconstruction in pediatric chest CT: assessment of image quality in a prospective study of children with cystic fibrosis.
Périodique
Pediatric Radiology
Auteur⸱e⸱s
Miéville F.A., Berteloot L., Grandjean A., Ayestaran P., Gudinchet F., Schmidt S., Brunelle F., Bochud F.O., Verdun F.R.
ISSN
1432-1998 (Electronic)
ISSN-L
0301-0449
Statut éditorial
Publié
Date de publication
2013
Volume
43
Numéro
5
Pages
558-567
Langue
anglais
Notes
Publication types: Journal ArticlePublication Status: ppublish. PDF type: Original Article
Résumé
BACKGROUND: The potential effects of ionizing radiation are of particular concern in children. The model-based iterative reconstruction VEO(TM) is a technique commercialized to improve image quality and reduce noise compared with the filtered back-projection (FBP) method.
OBJECTIVE: To evaluate the potential of VEO(TM) on diagnostic image quality and dose reduction in pediatric chest CT examinations.
MATERIALS AND METHODS: Twenty children (mean 11.4 years) with cystic fibrosis underwent either a standard CT or a moderately reduced-dose CT plus a minimum-dose CT performed at 100 kVp. Reduced-dose CT examinations consisted of two consecutive acquisitions: one moderately reduced-dose CT with increased noise index (NI = 70) and one minimum-dose CT at CTDIvol 0.14 mGy. Standard CTs were reconstructed using the FBP method while low-dose CTs were reconstructed using FBP and VEO. Two senior radiologists evaluated diagnostic image quality independently by scoring anatomical structures using a four-point scale (1 = excellent, 2 = clear, 3 = diminished, 4 = non-diagnostic). Standard deviation (SD) and signal-to-noise ratio (SNR) were also computed.
RESULTS: At moderately reduced doses, VEO images had significantly lower SD (P < 0.001) and higher SNR (P < 0.05) in comparison to filtered back-projection images. Further improvements were obtained at minimum-dose CT. The best diagnostic image quality was obtained with VEO at minimum-dose CT for the small structures (subpleural vessels and lung fissures) (P < 0.001). The potential for dose reduction was dependent on the diagnostic task because of the modification of the image texture produced by this reconstruction.
CONCLUSIONS: At minimum-dose CT, VEO enables important dose reduction depending on the clinical indication and makes visible certain small structures that were not perceptible with filtered back-projection.
Pubmed
Web of science
Open Access
Oui
Création de la notice
17/12/2012 17:53
Dernière modification de la notice
14/02/2022 7:57
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