Diffusion tensor imaging and cognition in cerebral small vessel disease The RUN DMC study

A.G.W. van Norden, K.F. de Laat, E.J. van Dijk, I.W.M. van Uden, L.J.B. van Oudheusden, R.A.R. Gons, David Gordon Norris, M.P. Zwiers, Frank-Erik de Leeuw

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Background Cerebral small vessel disease (SVD) is very common in elderly and related to cognition, although this relation is weak. This might be because the underlying pathology of white matter lesions (WML) is diverse and cannot be properly appreciated with conventional FLAIR MRI. In addition, conventional MRI is not sensitive to early loss of microstructural integrity of the normal appearing white matter (NAWM), which might be an important factor. Diffusion tensor imaging (DTI) provides alternative information on microstructural white matter integrity and we have used this to investigate the relation between white matter integrity, in both WML and NAWM, and cognition among elderly with cerebral SVD. Methods The RUN DMC study is a prospective cohort study among 503 independently living, non-demented elderly with cerebral SVD aged between 50 and 85 years. All subjects underwent MRI and DTI scanning. WML were segmented manually. We measured mean diffusivity (MD) and fractional anisotropy (FA), as assessed by DTI in both WML and NAWM. Results Inverse relations were found between MD in the WML and NAWM and global cognitive function (β = −.11, p < 0.05; β = −.18, p < 0.001), psychomotor speed (β = −.15, p < 0.01; β = −.18, p < 0.001), concept shifting (β = −.11, p < 0.05; β = −.10, p < 0.05) and attention (β = −.12, p < 0.05; β = −.15, p < 0.001). The relation between DTI parameters in both WML and NAWM and cognitive performance was most pronounced in subjects with severe WML. Conclusion DTI parameters in both WML and NAWM correlate with cognitive performance, independent of SVD. DTI may be a promising tool in exploring the mechanisms of cognitive decline and could function as a surrogate marker for disease progression in therapeutic trials
Original languageEnglish
Pages (from-to)401-407
JournalBiochimica et biophysica acta. Molecular basis of disease
Issue number3
Publication statusPublished - 2012


  • METIS-292339
  • IR-83014


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