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  Correcting eddy current and motion effects by affine whole-brain registrations: Evaluation of three-dimensional distortions and comparison with slicewise correction

Mohammadi, S., Möller, H. E., Kugel, H., Müller, D. K., & Deppe, M. (2010). Correcting eddy current and motion effects by affine whole-brain registrations: Evaluation of three-dimensional distortions and comparison with slicewise correction. Magnetic Resonance in Medicine, 64(4), 1047-1056. doi:10.1002/mrm.22501.

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https://onlinelibrary.wiley.com/doi/10.1002/mrm.22501 (Verlagsversion)
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 Urheber:
Mohammadi, Siawoosh1, Autor
Möller, Harald E.2, Autor           
Kugel, Harald3, Autor
Müller, Dirk K.2, Autor           
Deppe, Michael1, Autor
Affiliations:
1Department of Neurology, University of Münster, Germany, ou_persistent22              
2Methods and Development Unit Nuclear Magnetic Resonance, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634558              
3Department of Clinical Radiology, University of Münster, Germany, ou_persistent22              

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Schlagwörter: Affine transformation; Diffusion tensor imaging; Eddy current correction; Motion correction
 Zusammenfassung: Eddy-current (EC) and motion effects in diffusion-tensor imaging (DTI) bias the estimation of quantitative diffusion indices, such as the fractional anisotropy. Both effects can be retrospectively corrected by registering the strongly distorted diffusion-weighted images to less-distorted T2-weighted images acquired without diffusion weighting. Two different affine spatial transformations are usually employed for this correction: slicewise and whole-brain transformations. However, a relation between estimated transformation parameters and EC distortions has not been established yet for the latter approach. In this study, a novel diffusion-gradient-direction- independent estimation of the EC field is proposed based solely on affine whole-brain registration parameters. Using this model, it is demonstrated that a more distinct evaluation of the whole-brain EC effects is possible if the through-plane distortion was considered in addition to the well-known in-plane distortions. Moreover, a comparison of different whole-brain registrations relative to a slicewise approach is performed, in terms of the relative tensor error. Our findings suggest that for appropriate intersubject comparison of DTI data, a whole-brain registration containing nine affine parameters provides comparable performance (between 0 and 3%) to slicewise methods and can be performed in a fraction of the time. © 2010 Wiley-Liss, Inc.

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Sprache(n): eng - English
 Datum: 2009-07-132010-04-062010-06-222010-10
 Publikationsstatus: Erschienen
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 Identifikatoren: ISI: 000282477100013
DOI: 10.1002/mrm.22501
PMID: 20574966
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Projektname : Project A8
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Förderorganisation : Collaborative Research Centre SFB/TR 3
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Förderorganisation : Deutsche Forschungsgemeinschaft (DFG)
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Förderorganisation : Neuromedical Foundation, Münster

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Titel: Magnetic Resonance in Medicine
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: New York : Wiley-Liss
Seiten: - Band / Heft: 64 (4) Artikelnummer: - Start- / Endseite: 1047 - 1056 Identifikator: ISSN: 0740-3194
CoNE: https://pure.mpg.de/cone/journals/resource/954925538149