Non-Cartesian GRAPPA and coil combination using interleaved calibration data - application to concentric-ring MRSI of the human brain at 7T.

Brain / metabolism Brain Mapping / methods Calibration Healthy Volunteers Humans Image Enhancement / methods Image Processing, Computer-Assisted / methods Imaging, Three-Dimensional Magnetic Resonance Spectroscopy / instrumentation Signal-To-Noise Ratio
7 tesla MR spectroscopic imaging hybrid through-time/through-k-space GRAPPA multichannel coil combination non-Cartesian concentric ring parallel imaging

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 2019
Historique:
received: 19 02 2019
revised: 29 04 2019
accepted: 01 05 2019
pubmed: 12 6 2019
medline: 20 6 2020
entrez: 12 6 2019
Statut: ppublish

Résumé

Proton MR spectroscopic imaging (MRSI) benefits from B Six healthy volunteers were scanned at 7T. Three calibration datasets for coil combination and PI were recorded: a) iMUSICAL, b) static MUSICAL as prescan, c) moved MUSICAL as prescan with misaligned head position. The coil combination performance, including motion sensitivity, of iMUSICAL was compared to MUSICAL for single-slice free induction decay (FID)-MRSI. Through-time/through-k-space-GRAPPA with constant/variable-density undersampling was evaluated on the same data, comparing the three calibration datasets. Additionally, the proposed method was successfully applied to 3D whole-brain FID-MRSI. Using iMUSICAL for coil combination yielded the highest signal-to-noise ratio (SNR) (+9%) and lowest Cramer-Rao lower bounds (CRLBs) (-6%) compared to both MUSICAL approaches, with similar metabolic map quality. Also, excellent mean g-factors of 1.07 and low residual lipid aliasing were obtained when using iMUSICAL as calibration data for two-fold, variable-density undersampling, while significantly degraded metabolic maps were obtained using the misaligned MUSICAL calibration data. Through-time/through-k-space-GRAPPA can accelerate already time-efficient non-Cartesian spatial-spectral 2D/3D-MRSI encoding even further. Particularly promising results have been achieved using iMUSICAL as a robust, interleaved multipurpose calibration for MRSI reconstruction, without extra calibration prescan.

Identifiants

DOI: 10.1002/mrm.27822 PMID: 31183893 PMC: PMC6772100
pubmed: 31183893
doi: 10.1002/mrm.27822
pmc: PMC6772100
doi:

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

1587-1603

Subventions

Organisme : Austrian Science Fund FWF
ID : KLI 646
Pays : Austria
Organisme : Austrian Science Fund FWF
ID : KLI 718
Pays : Austria
Organisme : Austrian Science Fund FWF
ID : P 30701
Pays : Austria

Informations de copyright

© 2019 The Authors. Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine.

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Auteurs

Philipp Moser (P)

High Field MR Center, Department of Biomedical Imaging and Image-Guided Therapy, Medical University Vienna, Vienna, Austria.
ORCID: 0000-0002-9717-6197

Wolfgang Bogner (W)

High Field MR Center, Department of Biomedical Imaging and Image-Guided Therapy, Medical University Vienna, Vienna, Austria.

Lukas Hingerl (L)

High Field MR Center, Department of Biomedical Imaging and Image-Guided Therapy, Medical University Vienna, Vienna, Austria.

Eva Heckova (E)

High Field MR Center, Department of Biomedical Imaging and Image-Guided Therapy, Medical University Vienna, Vienna, Austria.
ORCID: 0000-0001-9956-1470

Gilbert Hangel (G)

High Field MR Center, Department of Biomedical Imaging and Image-Guided Therapy, Medical University Vienna, Vienna, Austria.

Stanislav Motyka (S)

High Field MR Center, Department of Biomedical Imaging and Image-Guided Therapy, Medical University Vienna, Vienna, Austria.

Siegfried Trattnig (S)

High Field MR Center, Department of Biomedical Imaging and Image-Guided Therapy, Medical University Vienna, Vienna, Austria.
Christian Doppler Laboratory for Clinical Molecular MR Imaging, Vienna, Austria.

Bernhard Strasser (B)

High Field MR Center, Department of Biomedical Imaging and Image-Guided Therapy, Medical University Vienna, Vienna, Austria.
Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.
ORCID: 0000-0001-9542-3855

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Classifications MeSH

questionsmedicales.fr › Système nerveux › Système nerveux central › Encéphale › Non-Cartesian GRAPPA and coil combination...
questionsmedicales.fr › Techniques d'investigation › Neuroimagerie › Neuroimagerie fonctionnelle › Cartographie cérébrale › Non-Cartesian GRAPPA and coil combination...
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questionsmedicales.fr › Eucaryotes › Animaux › Chordés › Vertébrés › Mammifères › Eutheria › Primates › Haplorhini › Catarrhini › Hominidae › Humains › Non-Cartesian GRAPPA and coil combination...
questionsmedicales.fr › Sciences de l'information › Méthodologies informatiques › Traitement d'image par ordinateur › Amélioration d'image › Non-Cartesian GRAPPA and coil combination...
questionsmedicales.fr › Sciences de l'information › Méthodologies informatiques › Traitement d'image par ordinateur › Non-Cartesian GRAPPA and coil combination...
questionsmedicales.fr › Sciences de l'information › Méthodologies informatiques › Traitement d'image par ordinateur › Imagerie tridimensionnelle › Non-Cartesian GRAPPA and coil combination...
questionsmedicales.fr › Techniques d'investigation › Techniques de chimie analytique › Analyse spectrale › Spectroscopie par résonance magnétique › Non-Cartesian GRAPPA and coil combination...
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