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

  • Diagnostic Neuroradiology
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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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Correspondence to Timo J. I. Kurki.

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The authors declare that they have no conflict of interest.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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Kurki, T.J.I., Heiskanen, L.A.A. Diffusion parameters of the core of cingulum are associated with age-related ventricular enlargement: a diffusion tensor tractography study. Neuroradiology 60, 1013–1018 (2018). https://doi.org/10.1007/s00234-018-2068-3

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  • DOI: https://doi.org/10.1007/s00234-018-2068-3

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