MRI-Defined Corpus Callosal Atrophy in Multiple Sclerosis: A Comparison of Volumetric Measurements, Corpus Callosum Area and Index

Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging
Tobias GranbergJuha Martola

Abstract

To compare corpus callosum area (CCA) and corpus callosum index (CCI) in terms of feasibility and their performance as biomarkers for cognitive and physical disability in multiple sclerosis (MS). A secondary aim was to compare these two methods with volumetric measurements. This study was based on a cohort of 37 MS patients and a group of age- and gender-matched healthy controls. Physical disability was assessed with the expanded disability status scale (EDSS) and cognitive disability with the symbol digit modalities test (SDMT). CCA and CCI were assessed on midsagittal brain MRI by 3 raters with varying radiological experience. Volumes of the brain, gray and white matter, corpus callosum, and MS lesions were acquired with Freesurfer and Lesion Segmentation Toolbox for Statistical Parametric Mapping. CCA and CCI were obtained within seconds with excellent intra- and inter-rater agreement, and outperformed volumetric measurements. CCA had the strongest correlations with both SDMT (r = .82, P < .001) and EDSS (r = -.56, P < .001), and the highest accuracy in differentiating patients from controls (95%) and relapse-remitting MS from progressive forms of MS (77%). CCI performed less well (r = .73, P < .001; r = -.45, P < .001; 94%;...Continue Reading

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Sep 14, 2015·Molecular Neurobiology·René Große-VeldmannMarkus Kipp
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Feb 8, 2018·Multiple Sclerosis and Related Disorders·Lucas Immich GonçalvesJefferson Becker

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