Mapping and correcting hyperpolarized magnetization decay with radial keyhole imaging.
129Xe
UTE
hyperpolarization
keyhole
pulmonary
radial
ventilation
Journal
Magnetic resonance in medicine
ISSN: 1522-2594
Titre abrégé: Magn Reson Med
Pays: United States
ID NLM: 8505245
Informations de publication
Date de publication:
07 2019
07 2019
Historique:
received:
23
10
2018
revised:
17
01
2019
accepted:
11
02
2019
pubmed:
9
3
2019
medline:
26
5
2020
entrez:
9
3
2019
Statut:
ppublish
Résumé
Hyperpolarized (HP) media enable biomedical imaging applications that cannot be achieved with conventional MRI contrast agents. Unfortunately, quantifying HP images is challenging, because relaxation and radio-frequency pulsing generate spatially varying signal decay during acquisition. We demonstrate that, by combining center-out k-space sampling with postacquisition keyhole reconstruction, voxel-by-voxel maps of regional HP magnetization decay can be generated with no additional data collection. Digital phantom, HP Mean, keyhole-derived decay terms showed excellent agreement with the decay used in simulations (R We have demonstrated that center-out trajectories combined with keyhole reconstruction can be used to map regional HP signal decay and to quantitatively correct images. This approach may be used to improve the accuracy of quantitative measures obtained from hyperpolarized media. Although validated with gaseous HP
Identifiants
pubmed: 30847967
doi: 10.1002/mrm.27721
pmc: PMC6491256
mid: NIHMS1011935
doi:
Substances chimiques
Contrast Media
0
Xenon Isotopes
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
367-376Subventions
Organisme : NHLBI NIH HHS
ID : R01 HL143011
Pays : United States
Organisme : NHLBI NIH HHS
ID : R44 HL123299
Pays : United States
Organisme : NHLBI NIH HHS
ID : U01 HL134745
Pays : United States
Organisme : NHLBI NIH HHS
ID : T32 HL007752
Pays : United States
Organisme : NHLBI NIH HHS
ID : R00 HL111217
Pays : United States
Informations de copyright
© 2019 International Society for Magnetic Resonance in Medicine.
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