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Reproduction of motion artifacts for performance analysis of prospective motion correction in MRI
Author(s) -
Herbst Michael,
Maclaren Julian,
LovellSmith Cris,
Sostheim Rebecca,
Egger Karl,
Harloff Andreas,
Korvink Jan,
Hennig Juergen,
Zaitsev Maxim
Publication year - 2014
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.24645
Subject(s) - imaging phantom , computer vision , computer science , artificial intelligence , motion (physics) , image quality , match moving , artifact (error) , tracking (education) , image (mathematics) , nuclear medicine , medicine , psychology , pedagogy
Purpose Despite numerous publications describing the ability of prospective motion correction to improve image quality in magnetic resonance imaging of the brain, a reliable approach to assess this improvement is still missing. A method that accurately reproduces motion artifacts correctable with prospective motion correction is developed, and enables the quantification of the improvements achieved. Methods A software interface was developed to simulate rigid body motion by changing the scanning coordinate system relative to the object. Thus, tracking data recorded during a patient scan can be used to reproduce the prevented motion artifacts on a volunteer or a phantom. The influence of physiological motion on image quality was investigated by filtering these data. Finally, the method was used to reproduce and quantify the motion artifacts prevented in a patient scan. Results The accuracy of the method was tested in phantom experiments and in vivo. The calculated quality factor, as well as a visual inspection of the reproduced artifacts shows a good correspondence to the original. Conclusion Precise reproduction of motion artifacts assists qualification of prospective motion correction strategies. The presented method provides an important tool to investigate the effects of rigid body motion on a wide range of sequences, and to quantify the improvement in image quality through prospective motion correction. Magn Reson Med 71:182–190, 2014. © 2013 Wiley Periodicals, Inc.