Correction of B<inf>0</inf>-induced geometric distortion variations in prospective motion correction for 7T MRI

© 2016, ESMRMB. Objective: Prospective motion correction can effectively fix the imaging volume of interest. For large motion, this can lead to relative motion of coil sensitivities, distortions associated with imaging gradients and B0field variations. This work accounts for the B0field change due t...

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Main Authors: Uten Yarach, Chaiya Luengviriya, Daniel Stucht, Frank Godenschweger, Peter Schulze, Oliver Speck
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/55202
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-552022018-09-05T03:09:37Z Correction of B<inf>0</inf>-induced geometric distortion variations in prospective motion correction for 7T MRI Uten Yarach Chaiya Luengviriya Daniel Stucht Frank Godenschweger Peter Schulze Oliver Speck Biochemistry, Genetics and Molecular Biology Health Professions Medicine © 2016, ESMRMB. Objective: Prospective motion correction can effectively fix the imaging volume of interest. For large motion, this can lead to relative motion of coil sensitivities, distortions associated with imaging gradients and B0field variations. This work accounts for the B0field change due to subject movement, and proposes a method for correcting tissue magnetic susceptibility-related distortion in prospective motion correction. Materials and methods: The B0field shifts at the different head orientations were characterized. A volunteer performed large motion with prospective motion correction enabled. The acquired data were divided into multiple groups according to the object positions. The correction of B0-related distortion was applied to each group of data individually via augmented sensitivity encoding with additionally integrated gradient nonlinearity correction. Results: The relative motion of the gradients, B0field and coil sensitivities in prospective motion correction results in residual spatial distortion, blurring, and coil artifacts. These errors can be mitigated by the proposed method. Moreover, iterative conjugate gradient optimization with regularization provided superior results with smaller RMSE in comparison to standard conjugate gradient. Conclusion: The combined correction of B0-related distortion and gradient nonlinearity leads to a reduction of residual motion artifacts in prospective motion correction data. 2018-09-05T02:53:02Z 2018-09-05T02:53:02Z 2016-06-01 Journal 13528661 09685243 2-s2.0-84957674924 10.1007/s10334-015-0515-2 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84957674924&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/55202
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Biochemistry, Genetics and Molecular Biology
Health Professions
Medicine
spellingShingle Biochemistry, Genetics and Molecular Biology
Health Professions
Medicine
Uten Yarach
Chaiya Luengviriya
Daniel Stucht
Frank Godenschweger
Peter Schulze
Oliver Speck
Correction of B<inf>0</inf>-induced geometric distortion variations in prospective motion correction for 7T MRI
description © 2016, ESMRMB. Objective: Prospective motion correction can effectively fix the imaging volume of interest. For large motion, this can lead to relative motion of coil sensitivities, distortions associated with imaging gradients and B0field variations. This work accounts for the B0field change due to subject movement, and proposes a method for correcting tissue magnetic susceptibility-related distortion in prospective motion correction. Materials and methods: The B0field shifts at the different head orientations were characterized. A volunteer performed large motion with prospective motion correction enabled. The acquired data were divided into multiple groups according to the object positions. The correction of B0-related distortion was applied to each group of data individually via augmented sensitivity encoding with additionally integrated gradient nonlinearity correction. Results: The relative motion of the gradients, B0field and coil sensitivities in prospective motion correction results in residual spatial distortion, blurring, and coil artifacts. These errors can be mitigated by the proposed method. Moreover, iterative conjugate gradient optimization with regularization provided superior results with smaller RMSE in comparison to standard conjugate gradient. Conclusion: The combined correction of B0-related distortion and gradient nonlinearity leads to a reduction of residual motion artifacts in prospective motion correction data.
format Journal
author Uten Yarach
Chaiya Luengviriya
Daniel Stucht
Frank Godenschweger
Peter Schulze
Oliver Speck
author_facet Uten Yarach
Chaiya Luengviriya
Daniel Stucht
Frank Godenschweger
Peter Schulze
Oliver Speck
author_sort Uten Yarach
title Correction of B<inf>0</inf>-induced geometric distortion variations in prospective motion correction for 7T MRI
title_short Correction of B<inf>0</inf>-induced geometric distortion variations in prospective motion correction for 7T MRI
title_full Correction of B<inf>0</inf>-induced geometric distortion variations in prospective motion correction for 7T MRI
title_fullStr Correction of B<inf>0</inf>-induced geometric distortion variations in prospective motion correction for 7T MRI
title_full_unstemmed Correction of B<inf>0</inf>-induced geometric distortion variations in prospective motion correction for 7T MRI
title_sort correction of b<inf>0</inf>-induced geometric distortion variations in prospective motion correction for 7t mri
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84957674924&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/55202
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