Transferring principles of solid-state and Laplace NMR to the field of in vivo brain MRI.
Journal
Magnetic resonance (Gottingen, Germany)
ISSN: 2699-0016
Titre abrégé: Magn Reson (Gott)
Pays: Germany
ID NLM: 101775538
Informations de publication
Date de publication:
2020
2020
Historique:
received:
18
10
2019
accepted:
18
02
2020
medline:
28
2
2020
pubmed:
28
2
2020
entrez:
31
10
2023
Statut:
epublish
Résumé
Magnetic resonance imaging (MRI) is the primary method for noninvasive investigations of the human brain in health, disease, and development but yields data that are difficult to interpret whenever the millimeter-scale voxels contain multiple microscopic tissue environments with different chemical and structural properties. We propose a novel MRI framework to quantify the microscopic heterogeneity of the living human brain as spatially resolved five-dimensional relaxation-diffusion distributions by augmenting a conventional diffusion-weighted imaging sequence with signal encoding principles from multidimensional solid-state nuclear magnetic resonance (NMR) spectroscopy, relaxation-diffusion correlation methods from Laplace NMR of porous media, and Monte Carlo data inversion. The high dimensionality of the distribution space allows resolution of multiple microscopic environments within each heterogeneous voxel as well as their individual characterization with novel statistical measures that combine the chemical sensitivity of the relaxation rates with the link between microstructure and the anisotropic diffusivity of tissue water. The proposed framework is demonstrated on a healthy volunteer using both exhaustive and clinically viable acquisition protocols.
Identifiants
pubmed: 37904884
doi: 10.5194/mr-1-27-2020
pii: 01021829
pmc: PMC10500744
doi:
Types de publication
Journal Article
Langues
eng
Pagination
27-43Informations de copyright
Copyright: © 2020 João P. de Almeida Martins et al.
Déclaration de conflit d'intérêts
Daniel Topgaard owns shares in and João P. de Almeida Martins is partially employed by the private company Random Walk Imaging AB (Lund, Sweden), which holds patents related to the described method. All other authors declare no competing interests.
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