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Published in: Neuroradiology 3/2018

Open Access 01-03-2018 | Diagnostic Neuroradiology

Alteration of putaminal fractional anisotropy in Parkinson’s disease: a longitudinal diffusion kurtosis imaging study

Authors: Yulia Surova, Markus Nilsson, Björn Lampinen, Jimmy Lätt, Sara Hall, Håkan Widner, Danielle van Westen, Oskar Hansson

Published in: Neuroradiology | Issue 3/2018

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Abstract

Purpose

In Parkinson’s disease (PD), pathological microstructural changes occur that may be detected using diffusion magnetic resonance imaging (dMRI). However, there are few longitudinal studies that explore the effect of disease progression on diffusion indices.

Methods

We prospectively included 76 patients with PD and 38 healthy controls (HC), all of whom underwent diffusion kurtosis imaging (DKI) as part of the prospective Swedish BioFINDER study at baseline and 2 years later. Annualized rates of change in DKI parameters, including fractional anisotropy (FA), mean diffusivity (MD), and mean kurtosis (MK), were estimated in the gray matter (GM) by placing regions of interest (ROIs) in the basal ganglia and the thalamus, and in the white matter (WM) by tract-based spatial statistics (TBSS) analysis.

Results

When adjusting for potential confounding factors (age, gender, baseline-follow-up interval, and software upgrade of MRI scanner), only a decrease in FA in the putamen of PD patients (β = − 0.248, P < .01) over 2 years was significantly different from the changes observed in HC over the same time period. This 2-year decrease in FA in the putamen in PD correlated with higher l-dopa equivalent dose at baseline (Spearman’s rho = .399, P < .0001).

Conclusion

The study indicates that in PD microstructural changes in the putamen occur selectively over a 2-year period and can be detected with DKI.
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Metadata
Title
Alteration of putaminal fractional anisotropy in Parkinson’s disease: a longitudinal diffusion kurtosis imaging study
Authors
Yulia Surova
Markus Nilsson
Björn Lampinen
Jimmy Lätt
Sara Hall
Håkan Widner
Danielle van Westen
Oskar Hansson
Publication date
01-03-2018
Publisher
Springer Berlin Heidelberg
Published in
Neuroradiology / Issue 3/2018
Print ISSN: 0028-3940
Electronic ISSN: 1432-1920
DOI
https://doi.org/10.1007/s00234-017-1971-3

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Acknowledgment to Referees

Reviewers January 2017—December 2017