In vivo macromolecule signals in rat brain
1H-MRS
UHF
baseline
fitting
macromolecules
parametrization
rat brain
relaxation times
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:
11 2021
11 2021
Historique:
revised:
25
05
2021
received:
27
01
2021
accepted:
11
06
2021
pubmed:
17
7
2021
medline:
27
10
2021
entrez:
16
7
2021
Statut:
ppublish
Résumé
Reliable detection and fitting of macromolecules (MM) are crucial for accurate quantification of brain short-echo time (TE) A single inversion recovery sequence combined with advanced AMARES prior knowledge was used to eliminate the metabolite residuals, fit, and parametrize 10 MM components directly from 9.4T rat brain in vivo A very stiff baseline (DKNTMN ≥ 1 ppm) in combination with a single MM spectrum led to deviations in metabolite concentrations. For some metabolites the parametrized MM showed deviations from the ground truth for all DKNTMN values. Adding prior knowledge on parametrized MM improved MM and metabolite quantification. The apparent T Moderate flexibility in the spline baseline was required for reliable quantification of real/experimental spectra based on in vivo and Monte Carlo data. Prior knowledge on parametrized MM improved MM and metabolite quantification.
Identifiants
pubmed: 34268821
doi: 10.1002/mrm.28910
pmc: PMC8596437
mid: NIHMS1714727
doi:
Substances chimiques
Macromolecular Substances
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
2384-2401Subventions
Organisme : NINDS NIH HHS
ID : P30 NS076408
Pays : United States
Organisme : NIBIB NIH HHS
ID : P41 EB027061
Pays : United States
Informations de copyright
© 2021 The Authors. Magnetic Resonance in Medicine published by Wiley Periodicals LLC on behalf of International Society for Magnetic Resonance in Medicine.
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