Accelerated Time-of-Flight Magnetic Resonance Angiography with Sparse Undersampling and Iterative Reconstruction for the Evaluation of Intracranial Arteries.
Intracranial vessels
Iterative reconstruction
Magnetic resonance angiography (MRA)
Sparse
Time-of-Flight (TOF)
Journal
Korean journal of radiology
ISSN: 2005-8330
Titre abrégé: Korean J Radiol
Pays: Korea (South)
ID NLM: 100956096
Informations de publication
Date de publication:
02 2019
02 2019
Historique:
received:
15
10
2017
accepted:
18
04
2018
entrez:
24
1
2019
pubmed:
24
1
2019
medline:
17
10
2019
Statut:
ppublish
Résumé
To compare the image quality of three-dimensional time-of-flight (TOF) magnetic resonance angiography (MRA) with sparse undersampling and iterative reconstruction (sparse TOF) with that of conventional TOF MRA. This study included 56 patients who had undergone sparse TOF MRA for intracranial artery evaluation on a 3T MR scanner. Conventional TOF MRA scans were also acquired from 29 patients with matched acquisition times and another 27 patients with matched scanning parameters. The image quality was scored using a five-point scale based on the delineation of arterial vessel segments, artifacts, overall vessel visualization, and overall image quality by two radiologists independently, and the data were analyzed using the non-parametric Wilcoxon signed-rank test. Contrast ratios (CRs) of vessels were compared using the paired t test. Interobserver agreement was calculated using the kappa test. Compared with conventional TOF at the same spatial resolution, sparse TOF with an acceleration factor of 3.5 could reduce acquisition time by 40% and showed comparable image quality. In addition, when compared with conventional TOF with the same acquisition time, sparse TOF with an acceleration factor of 5 could also achieve higher spatial resolution, better delineation of vessel segments, fewer artifacts, higher image quality, and a higher CR ( Compared with conventional TOF, sparse TOF can achieve equivalent image quality in a reduced duration. Furthermore, using the same acquisition time, sparse TOF could improve the delineation of vessels and decrease image artifacts.
Identifiants
pubmed: 30672166
pii: 20.265
doi: 10.3348/kjr.2017.0634
pmc: PMC6342758
doi:
Types de publication
Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
265-274Informations de copyright
Copyright © 2019 The Korean Society of Radiology.
Déclaration de conflit d'intérêts
The authors have no financial conflicts of interest.
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