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Abstract

Background:

There is growing interest in white matter (WM) imaging with positron emission tomography (PET).

Objectives:

We studied the association of cognitive function in late multiple sclerosis (MS) with cortical and WM Pittsburgh compound-B PET (PiB-PET) binding.

Methods:

In the population-based Mayo Clinic Study of Aging, 24 of 4869 participants had MS (12 underwent PiB-PET). Controls were age and sex matched (5:1). We used automated or semi-automated processing for quantitative image analyses and conditional logistic regression for group differences.

Results:

MS patients had lower memory (p = 0.03) and language (p = 0.02) performance; smaller thalamic volumes (p = 0.003); and thinner temporal (p = 0.001) and frontal (p = 0.045) cortices on magnetic resonance imaging (MRI) than controls. There was no difference in global cortical PiB standardized uptake value ratios between MS and controls (p = 0.35). PiB uptake was lower in areas of WM hyperintensities compared to normal-appearing white matter (NAWM) in MS (p = 0.0002). Reduced PiB uptake in both the areas of WM hyperintensities (r = 0.65; p = 0.02) and NAWM (r = 0.69; p = 0.01) was associated with decreased visuospatial performance in MS.

Conclusion:

PiB uptake in the cortex in late MS is not different from normal age-matched controls. PiB uptake in the WM in late MS may be a marker of the large network structures’ integrity such as those involved in visuospatial performance.

Keywords

Pittsburgh compound-B PET multiple sclerosis myelin cognition thalamus

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Pittsburgh compound-B PET white matter imaging and cognitive function in late multiple sclerosis

Abstract

Background:

Objectives:

Methods:

Results:

Conclusion:

Keywords

Get full access to this article

References

Supplementary Material