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Neuroradiology
Published in: Neuroradiology 10/2018

01-10-2018 | Diagnostic Neuroradiology

Diffusion parameters of the core of cingulum are associated with age-related ventricular enlargement: a diffusion tensor tractography study

Authors: Timo J. I. Kurki, Lauri A. A. Heiskanen

Published in: Neuroradiology | Issue 10/2018

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Abstract

Purpose

To evaluate the influence of the size of lateral ventricles on diffusion parameters of the normal cingulate bundle.

Methods

Eighty normal subjects (17–55 years) underwent MRI at 3 T including diffusion tensor imaging. Superior (SC) and inferior (IC) cingulum were analyzed separately. Mean diffusivity (MD0.30) and fractional anisotropy (FA0.30) were measured by tractography at FA threshold 0.30; further diffusion parameters were analyzed by tractography-based core analysis in volumes of 3.0 cm3/1.5 cm3. The diffusion parameters were correlated with corresponding cross-sectional coronal areas of lateral ventricles. The analysis was performed also separately for young (17–34) and middle-aged (35–55) subjects.

Results

FA0.30 values did not correlate with ventricular size, but there was a weak negative correlation (r = − 0.225) between MD0.30 of SC and ventricular size. In all controls and in the older age group, ventricular size correlated positively with core FA of SC (r = 0.262/r = 0.391) and negatively with mean diffusivity (r = − 0.324/r = − 0.303) and radial diffusivity (λ2: r = − 0.238/r = − 0.277; λ3: r = − 0.353/r = − 0.424) of the core of SC. In the younger age group, only the mean diffusivity of SC correlated with ventricular size (r = − 0.273). Ventricular size was not associated with axial diffusivity. The core parameters of IC did not correlate with ventricular size.

Conclusion

Radial diffusivity of the core of cingulum decreases in age-dependent ventricular enlargement, which can be related to tissue compaction with stretching of axons and diminution of extracellular spaces. The phenomenon, which is reverse to the assumed effect of age-related myelin loss, can influence on DTI parameters in middle-aged subjects.
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Metadata
Title
Diffusion parameters of the core of cingulum are associated with age-related ventricular enlargement: a diffusion tensor tractography study
Authors
Timo J. I. Kurki
Lauri A. A. Heiskanen
Publication date
01-10-2018
Publisher
Springer Berlin Heidelberg
Published in
Neuroradiology / Issue 10/2018
Print ISSN: 0028-3940
Electronic ISSN: 1432-1920
DOI
https://doi.org/10.1007/s00234-018-2068-3

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