Axonal water fraction as marker of white matter injury in primary‐progressive multiple sclerosis: a longitudinal study

2019 ◽  
Vol 26 (8) ◽  
pp. 1068-1074
Author(s):  
M. Margoni ◽  
M. Petracca ◽  
S. Schiavi ◽  
M. Fabian ◽  
A. Miller ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Longitudinal Study ◽  
White Matter ◽  
Progressive Multiple Sclerosis ◽  
White Matter Injury ◽  
Primary Progressive Multiple Sclerosis ◽  
Water Fraction ◽  
Primary Progressive

scholarly journals Grey and white matter volume changes in early primary progressive multiple sclerosis: a longitudinal study

Brain ◽  
2005 ◽  
Vol 128 (6) ◽  
pp. 1454-1460 ◽  
Author(s):  
Jaume Sastre-Garriga ◽  
Gordon T. Ingle ◽  
Declan T. Chard ◽  
Mara Cercignani ◽  
Lluís Ramió-Torrentà ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Longitudinal Study ◽  
White Matter ◽  
Progressive Multiple Sclerosis ◽  
Primary Progressive Multiple Sclerosis ◽  
White Matter Volume ◽  
Volume Changes ◽  
Primary Progressive ◽  
Matter Volume ◽  
Early Primary

Magnetisation transfer of normal appearing white matter in primary progressive multiple sclerosis

1999 ◽  
Vol 5 (5) ◽  
pp. 313-316 ◽  
Author(s):  
S M Leary ◽  
N C Silver ◽  
V L Stevenson ◽  
G J Barker ◽  
D H Miller ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
White Matter ◽  
Corpus Callosum ◽  
Progressive Multiple Sclerosis ◽  
Primary Progressive Multiple Sclerosis ◽  
Magnetisation Transfer ◽  
Centrum Semiovale ◽  
Primary Progressive ◽  
Normal Appearing White Matter ◽  
Frontal White Matter

Patients with primary progressive multiple sclerosis may develop severe disability despite a paucity of lesions on conventional magnetic resonance imaging, raising the possibility that intrinsic changes in normal appearing white matter (NAWM) contribute to disability. This study has measured magnetisation transfer ratio (MTR), an index of tissue damage, of NAWM in 52 patients with primary progressive multiple sclerosis and 26 healthy controls. Absolute values of MTR were obtained from the genu of the corpus callosum and pons, and mean values were calculated from bilateral regions in the centrum semiovale, frontal white matter, parieto-occipital white matter and posterior limb of the internal capsule. The median MTR was lower in all regions in patients compared to controls. Median values (per cent units) were significantly lower in corpus callosum (39.73 vs 40.63; P=0.01), frontal white matter (39.11 vs 39.59; P=0.01) and centrum semiovale (37.21 vs 37.82; P50.05). This study has demonstrated small but widespread decreases in MTR in NAWM in primary progressive multiple sclerosis supporting the hypothesis that there are intrinsic changes in NAWM which may contribute to disability in this patient group.

scholarly journals Alterations in sensorimotor and mesiotemporal cortices and diffuse white matter changes in primary progressive multiple sclerosis detected by adiabatic relaxometry

2020 ◽  
Author(s):  
Pavel Filip ◽  
Michal Dufek ◽  
Silvia Mangia ◽  
Shalom Michaeli ◽  
Martin Bares ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
White Matter ◽  
Large Scale ◽  
Diffusion Tensor ◽  
Neuronal Loss ◽  
Progressive Multiple Sclerosis ◽  
Primary Progressive Multiple Sclerosis ◽  
Primary Progressive ◽  
T1 And T2

Abstract Background: The research of primary progressive multiple sclerosis (PPMS) has not been able to capitalize on recent progresses in advanced MRI protocols searching for disease-specific microstructural changes. Methods: Conventional free precession T1 and T2, and rotating frame adiabatic T1ρ and T2ρ maps in combination with diffusion weighted parameters were acquired in 13 PPMS patients and 13 age and sex-matched controls.Results: T1ρ, a marker of crucial relevance for PPMS due to its sensitivity to neuronal loss, revealed large-scale changes in mesiotemporal structures, sensorimotor cortex and cingulate, in combination with diffuse alterations in the white matter and cerebellum. T2ρ, particularly sensitive to local tissue background gradients and thus indicator of iron accumulation, concurred with similar topography of damage, but of lower extent. Moreover, these adiabatic protocols completely dwarfed the outcomes of both conventional T1 and T2 maps and diffusion tensor/kurtosis approaches –methods previously implicated in the MRI research of PPMS.Conclusion: This study introduces adiabatic T1ρ and T2ρ as elegant markers confirming large-scale cortical grey matter, cerebellar and white matter alterations in PPMS invisible to other in vivo biomarkers.

scholarly journals Alterations in Sensorimotor and Mesiotemporal Cortices and Diffuse White Matter Changes in Primary Progressive Multiple Sclerosis Detected by Adiabatic Relaxometry

2021 ◽  
Vol 15 ◽  
Author(s):  
Pavel Filip ◽  
Michal Dufek ◽  
Silvia Mangia ◽  
Shalom Michaeli ◽  
Martin Bareš ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
White Matter ◽  
Large Scale ◽  
Diffusion Tensor ◽  
Progressive Multiple Sclerosis ◽  
Primary Progressive Multiple Sclerosis ◽  
Primary Progressive ◽  
Diffusion Weighted ◽  
T1 And T2 ◽  
And Diffusion

Background: The research of primary progressive multiple sclerosis (PPMS) has not been able to capitalize on recent progresses in advanced magnetic resonance imaging (MRI) protocols.Objective: The presented cross-sectional study evaluated the utility of four different MRI relaxation metrics and diffusion-weighted imaging in PPMS.Methods: Conventional free precession T1 and T2, and rotating frame adiabatic T1ρ and T2ρ in combination with diffusion-weighted parameters were acquired in 13 PPMS patients and 13 age- and sex-matched controls.Results: T1ρ, a marker of crucial relevance for PPMS due to its sensitivity to neuronal loss, revealed large-scale changes in mesiotemporal structures, the sensorimotor cortex, and the cingulate, in combination with diffuse alterations in the white matter and cerebellum. T2ρ, particularly sensitive to local tissue background gradients and thus an indicator of iron accumulation, concurred with similar topography of damage, but of lower extent. Moreover, these adiabatic protocols outperformed both conventional T1 and T2 maps and diffusion tensor/kurtosis approaches, methods previously used in the MRI research of PPMS.Conclusion: This study introduces adiabatic T1ρ and T2ρ as elegant markers confirming large-scale cortical gray matter, cerebellar, and white matter alterations in PPMS invisible to other in vivo biomarkers.

scholarly journals Chronic white matter lesion activity predicts clinical progression in primary progressive multiple sclerosis

Brain ◽  
2019 ◽  
Vol 142 (9) ◽  
pp. 2787-2799 ◽  
Author(s):  
Colm Elliott ◽  
Shibeshih Belachew ◽  
Jerry S Wolinsky ◽  
Stephen L Hauser ◽  
Ludwig Kappos ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
White Matter ◽  
White Matter Lesion ◽  
Progressive Multiple Sclerosis ◽  
Primary Progressive Multiple Sclerosis ◽  
Axonal Loss ◽  
Clinical Progression ◽  
Primary Progressive

Chronic active and slowly expanding/evolving lesions with smouldering inflammation are neuropathological correlates of progressive multiple sclerosis. Elliott et al. report that T1-weighted measures of chronic lesion activity predict clinically progressive multiple sclerosis, may represent a longitudinal neuroimaging correlate of smouldering demyelination and axonal loss, and are reduced by ocrelizumab.

scholarly journals A longitudinal study of cognition in primary progressive multiple sclerosis

Brain ◽  
2005 ◽  
Vol 128 (12) ◽  
pp. 2891-2898 ◽  
Author(s):  
S. J. Camp ◽  
V. L. Stevenson ◽  
A. J. Thompson ◽  
G. T. Ingle ◽  
D. H. Miller ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Longitudinal Study ◽  
Progressive Multiple Sclerosis ◽  
Primary Progressive Multiple Sclerosis ◽  
Primary Progressive
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