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P.071 Multi-parametric MRI at 7 T enables differentiation of MS and age-related white matter lesions

Published online by Cambridge University Press:  02 June 2017

A Wing Marques dos Santos
Affiliation:
(London)
Z Hosseini
Affiliation:
(London)
M Drangova
Affiliation:
(London)
D Rudko
Affiliation:
(Montreal)
J Matusinec
Affiliation:
(London)
R Menon
Affiliation:
(London)
M Kremenchutzky
Affiliation:
(London)
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Abstract

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Background: MRI criteria are used to support multiple sclerosis diagnosis and evolution. However, normal age-related lesions (ARLs) can be cofounded with MS white matter lesion (MSL). Methods: Two Multiparametric 7T MRI scans 4 motnhs apart from 5 relapsing MS (RMS) patients were analyzed and compared to 5 matched healthy controls (HC) aiming to differentiate MSLs from ARLs. Six-echo GRE, FLAIR and MPRAGE sequences were acquired. Results: Average size of ARLs was 51 mm3 and of MSLs was 69 mm3 (p=0.27). Both have the same general appearance on FLAIR and MPRAGE contrasts, but different contrast on the R2* and QS maps. Inter-visit variation on MPRAGE was significantly higher in MSLs. Inter-visit signal change in the other contrasts (QSM, R2* and FLAIR) was not significant. Conclusions: R2*, QS maps and inter-visit variation using MPRAGE allowed differentiating MSLs from ARLs in 5 RMS with mean long term disease duration. This could improve correct early diagnosis and accurate lesion load accumulation evolution.

Type
Poster Presentations
Copyright
Copyright © The Canadian Journal of Neurological Sciences Inc. 2017