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Magnetic Resonance in Medicine
Article . 2015 . Peer-reviewed
License: Wiley Online Library User Agreement
Data sources: Crossref
https://dx.doi.org/10.48550/ar...
Article . 2021
License: CC BY NC SA
Data sources: Datacite
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Eddy current compensated double diffusion encoded (DDE) MRI

Authors: Mueller, Lars; Wetscherek, Andreas; Kuder, Tristan Anselm; Laun, Frederik Bernd;

Eddy current compensated double diffusion encoded (DDE) MRI

Abstract

PurposeEddy currents might lead to image distortions in diffusion‐weighted echo planar imaging. A method is proposed to reduce their effects on double diffusion encoding (DDE) MRI experiments and the thereby derived microscopic fractional anisotropy (μFA).MethodsThe twice‐refocused spin echo scheme was adapted for DDE measurements. To assess the effect of individual diffusion encodings on the image distortions, measurements of a grid of plastic rods in water were performed. The effect of eddy current compensation on μFA measurements was evaluated in the brains of six healthy volunteers.ResultsThe use of an eddy current compensation reduced the signal variation. As expected, the distortions caused by the second encoding were larger than those of the first encoding, entailing a stronger need to compensate for them. For an optimal result, however, both encodings had to be compensated. The artifact reduction strongly improved the measurement of the μFA in ventricles and gray matter by reducing the overestimation. An effect of the compensation on absolute μFA values in white matter was not observed.ConclusionIt is advisable to compensate both encodings in DDE measurements for eddy currents. Magn Reson Med 77:328–335, 2017. © 2015 Wiley Periodicals, Inc.

Keywords

Diffusion Magnetic Resonance Imaging, Phantoms, Imaging, Image Processing, Computer-Assisted, Anisotropy, Brain, Humans, FOS: Physical sciences, Medical Physics (physics.med-ph), Physics - Medical Physics, Algorithms

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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!
8
Average
Average
Average
Green
bronze