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HAL AMU
Article . 2020
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Magnetic Resonance in Medicine
Article . 2020 . Peer-reviewed
License: Wiley Online Library User Agreement
Data sources: Crossref
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Three‐dimensional inhomogeneous magnetization transfer with rapid gradient‐echo (3D ihMTRAGE) imaging

Authors: Gopal Varma; Fanny Munsch; Brian Burns; Guillaume Duhamel; Olivier M. Girard; Arnaud Guidon; R. Marc Lebel; +1 Authors

Three‐dimensional inhomogeneous magnetization transfer with rapid gradient‐echo (3D ihMTRAGE) imaging

Abstract

PurposeTo demonstrate the feasibility of integrating the magnetization transfer (MT) preparations required for inhomogeneous MT (ihMT) within an MPRAGE‐style acquisition. Such a sequence allows for reduced power deposition and easy inclusion of other modules.MethodsAn ihMT MPRAGE–style sequence (ihMTRAGE) was initially simulated to investigate acquisition of the 3D ihMT data sequentially, or in an interleaved manner. The ihMTRAGE sequence was implemented on a 3T clinical scanner to acquire ihMT data from the brain and spine.ResultsBoth simulations and in vivo data provided an ihMT signal that was significantly greater using a sequential ihMTRAGE acquisition, compared with an interleaved implementation. Comparison with a steady‐state ihMT acquisition (defined as having one MT RF pulse between successive acquisition modules) demonstrated how ihMTRAGE allows for a reduction in average power deposition, or greater ihMT signal at equal average power deposition. Inclusion of a prospective motion‐correction module did not significantly affect the ihMT signal obtained from regions of interest in the brain. The ihMTRAGE acquisition allowed combination with a spatial saturation module to reduce phase wrap artifacts in a cervical spinal cord acquisition.ConclusionsUse of preparations necessary for ihMT experiments within an MPRAGE‐style sequence provides a useful alternative for acquiring 3D ihMT data. Compared with our steady‐state implementation, ihMTRAGE provided reduced power deposition, while allowing use of the maximum intensity from off‐resonance RF pulses. The 3D ihMTRAGE acquisition allowed combination of other modules with the preparation necessary for ihMT experiments, specifically motion compensation and spatial saturation modules.

Country
France
Keywords

brain, spinal cord, Brain, Magnetic Resonance Imaging, myelin, [SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, Imaging, Three-Dimensional, MPRAGE, MT, Image Processing, Computer-Assisted, Prospective Studies, Artifacts, inhomogeneous magnetization transfer

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    15
    popularity
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    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
15
Top 10%
Average
Top 10%
Green
bronze