Robust MR-based approaches to quantifying white matter structure and structure/function alterations in Huntington's disease
Journal article
Steventon, Jessica J., Trueman, Rebecca C., Rosser, Anne E. and Jones, Derek Kenton. (2016). Robust MR-based approaches to quantifying white matter structure and structure/function alterations in Huntington's disease. Journal of Neuroscience Methods. 265, pp. 2 - 12. https://doi.org/10.1016/j.jneumeth.2015.08.027
Authors | Steventon, Jessica J., Trueman, Rebecca C., Rosser, Anne E. and Jones, Derek Kenton |
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Abstract | Background: Huge advances have been made in understanding and addressing confounds in diffusion MRI data to quantify white matter microstructure. However, there has been a lag in applying these advances in clinical research. Some confounds are more pronounced in HD which impedes data quality and interpretability of patient-control differences. This study presents an optimised analysis pipeline and addresses specific confounds in a HD patient cohort. Method: 15 HD gene-positive and 13 matched control participants were scanned on a 3T MRI system with two diffusion MRI sequences. An optimised post processing pipeline included motion, eddy current and EPI correction, rotation of the B matrix, free water elimination ( FWE ) and tractography analysis using an algorithm capable of reconstructing crossing fibres. The corpus callosum was examined using both a region-of-interest and a deterministic tractography approach, using both conventional diffusion tensor imaging ( DTI )-based and spherical deconvolution analyses. Results: Correcting for CSF contamination significantly altered microstructural metrics and the detection of group differences. Reconstructing the corpus callosum using spherical deconvolution produced a more complete reconstruction with greater sensitivity to group differences, compared to DTI-based tractography. Tissue volume fraction ( TVF ) was reduced in HD participants and was more sensitive to disease burden compared to DTI metrics. Conclusion: Addressing confounds in diffusion MR data results in more valid, anatomically faithful white matter tract reconstructions with reduced within-group variance. TVF is recommended as a complementary metric, providing insight into the relationship with clinical symptoms in HD not fully captured by conventional DTI metrics. |
Keywords | diffusion MRI; Huntington's disease; tractography; corpus callosum; disease burden; DTI |
Year | 2016 |
Journal | Journal of Neuroscience Methods |
Journal citation | 265, pp. 2 - 12 |
Publisher | Elsevier |
ISSN | 0165-0270 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jneumeth.2015.08.027 |
Scopus EID | 2-s2.0-84941710391 |
Open access | Open access |
Page range | 2 - 12 |
Publisher's version | |
Additional information | © 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Place of publication | Netherlands |
https://acuresearchbank.acu.edu.au/item/88y35/robust-mr-based-approaches-to-quantifying-white-matter-structure-and-structure-function-alterations-in-huntington-s-disease
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