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  Controlling motion artefact levels in MR images by suspending data acquisition during periods of head motion

Castella, R., Arn, L., Dupuis, E., Callaghan, M. F., Draganski, B., & Lutti, A. (2018). Controlling motion artefact levels in MR images by suspending data acquisition during periods of head motion. Magnetic Resonance in Medicine, 80(6), 2415-2426. doi:10.1002/mrm.27214.

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 Creators:
Castella, Rémi 1, Author
Arn, Lionel 1, 2, Author
Dupuis, Estelle 1, Author
Callaghan, Martina F. 3, Author
Draganski, Bogdan1, 4, Author           
Lutti, Antoine 1, Author
Affiliations:
1Département des Neurosciences Cliniques, Laboratoire de Recherche en Neuroimagerie (LREN), Centre hospitalier universitaire vaudois, Lausanne, Switzerland, ou_persistent22              
2Swiss Federal Institute of Technology in Lausanne, Switzerland, ou_persistent22              
3Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, United Kingdom, ou_persistent22              
4Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              

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Free keywords: Acquisition suspension; Head movement; MRI artefacts; Multi‐parameter mapping; Prospective motion correction; Quantitative MRI
 Abstract: PURPOSE:

Head movements are a major source of MRI artefacts. Prospective motion correction techniques significantly improve data quality, but strong motion artefacts may remain in the data. We introduce a framework to suspend data acquisition during periods of head motion over a predefined threshold.
METHODS:

Data was acquired with prospective motion correction and an external optical tracking system. A predictor of motion impact was introduced that accounts for the amplitude of the signal acquired at the time of the motion. From this predictor, a threshold was defined to trigger the suspension of data acquisition during periods of motion. The framework was tested on 5 subjects, 2 motion behaviors, and 2 head coils (20 and 64 channels).
RESULTS:

The best improvements in data quality were obtained for a threshold value of 0, equivalent to suspending the acquisition based on head speed alone, at the cost of a long prolongation of scan time. For threshold values ∼3.5e-4 , image quality was largely preserved, and prolongation of scan time was minimal. Artefacts occasionally remained with the 64-channel head coil for all threshold values, seemingly due to head movement in the sharp sensitivity profile of this coil.
CONCLUSION:

The proposed suspension strategy is more efficient than relying on head speed alone. The threshold for suspension of data acquisition governs the tradeoff between image degradation due to motion and prolonged scan time, and can be tuned by the user according to the desired image quality and participant's tolerability.

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Language(s): eng - English
 Dates: 2018-02-202017-12-012018-03-182018-04-242018-12
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/mrm.27214
PMID: 29687919
Other: Epub 2018
 Degree: -

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Funding organization : Roger De Spoelberch Foundation
Project name : -
Grant ID : -
Funding program : -
Funding organization : Partridge Foundation
Project name : NCCR Synapsy
Grant ID : 32003B_159780
Funding program : -
Funding organization : Swiss National Science Foundation (SNSF)
Project name : -
Grant ID : -
Funding program : -
Funding organization : Foundation Parkinson Switzerland
Project name : -
Grant ID : -
Funding program : -
Funding organization : Foundation Synapsis
Project name : Human Brain Project Specific Grant Agreement 1 / HBP SGA1
Grant ID : 720270
Funding program : Horizon 2020
Funding organization : European Commission (EC)

Source 1

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Title: Magnetic Resonance in Medicine
Source Genre: Journal
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Publ. Info: New York : Wiley-Liss
Pages: - Volume / Issue: 80 (6) Sequence Number: - Start / End Page: 2415 - 2426 Identifier: ISSN: 0740-3194
CoNE: https://pure.mpg.de/cone/journals/resource/954925538149