The effect of tube focal spot size and acquisition mode on task-based image quality performance of a GE revolution HD dual energy CT scanner.
Dual energy CT
High resolution CT
Image quality
Task-based transfer function
Tube focal spot
Journal
Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)
ISSN: 1724-191X
Titre abrégé: Phys Med
Pays: Italy
ID NLM: 9302888
Informations de publication
Date de publication:
Jun 2021
Jun 2021
Historique:
received:
04
03
2021
revised:
05
05
2021
accepted:
17
05
2021
pubmed:
2
6
2021
medline:
23
6
2021
entrez:
1
6
2021
Statut:
ppublish
Résumé
To assess the task-based performance of images obtained under different focal spot size and acquisition mode on a dual-energy CT scanner. Axial CT image series of the Catphan phantom were obtained using a tube focus at different sizes. Acquisitions were performed in standard single-energy, high resolution (HR) and dual-energy modes. Images were reconstructed using conventional and high definition (HD) kernels. Task-based transfer function at the 50% level (TTF TTF The task-based image quality assessment metrics have shown that spatial resolution is higher for higher image contrast materials and detectability is higher in the standard single-energy mode compared to HR and dual-energy mode. The results of the current study provide CT operators the required knowledge to characterize their CT system towards the optimization of its clinical performance.
Identifiants
pubmed: 34062336
pii: S1120-1797(21)00207-6
doi: 10.1016/j.ejmp.2021.05.025
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
75-81Informations de copyright
Copyright © 2021 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.