MRI-derived g-ratio and lesion severity in newly diagnosed multiple sclerosis

EN York, SJ Martin, R Meijboom… - Brain …, 2021 - academic.oup.com
Myelin loss is associated with axonal damage in established multiple sclerosis. This
relationship is challenging to study in vivo in early disease. Here, we ask whether myelin …

Myelin and axon pathology in multiple sclerosis assessed by myelin water and multi-shell diffusion imaging

R Rahmanzadeh, PJ Lu, M Barakovic, M Weigel… - Brain, 2021 - academic.oup.com
Damage to the myelin sheath and the neuroaxonal unit is a cardinal feature of multiple
sclerosis; however, a detailed characterization of the interaction between myelin and axon …

[HTML][HTML] Comparing myelin-sensitive magnetic resonance imaging measures and resulting g-ratios in healthy and multiple sclerosis brains

RC Berg, A Menegaux, T Amthor, G Gilbert, M Mora… - Neuroimage, 2022 - Elsevier
The myelin concentration and the degree of myelination of nerve fibers can provide valuable
information on the integrity of human brain tissue. Magnetic resonance imaging (MRI) of …

Validation of rapid magnetic resonance myelin imaging in multiple sclerosis

R Ouellette, G Mangeat, I Polyak, M Warntjes… - Annals of …, 2020 - Wiley Online Library
Objective Magnetic resonance imaging (MRI) is essential for multiple sclerosis diagnostics
but is conventionally not specific to demyelination. Myelin imaging is often hampered by …

Multiple sclerosis plaques may undergo continuous myelin degradation: a cross-sectional study with myelin and axon-related quantitative magnetic resonance …

T Maekawa, A Hagiwara, K Yokoyama, M Hori… - Neuroradiology, 2022 - Springer
Purpose We hypothesize that myelin is more susceptible to damage over time than axons.
We investigated the association between the estimated duration from the onset of multiple …

Analysis of white matter damage in patients with multiple sclerosis via a novel in vivo MR method for measuring myelin, axons, and g-ratio

A Hagiwara, M Hori, K Yokoyama… - American Journal …, 2017 - Am Soc Neuroradiology
BACKGROUND AND PURPOSE: Myelin and axon volume fractions can now be estimated
via MR imaging in vivo, as can the g-ratio, which equals the ratio of the inner to the outer …

[HTML][HTML] Longitudinal microstructural MRI markers of demyelination and neurodegeneration in early relapsing-remitting multiple sclerosis: Magnetisation transfer …

EN York, R Meijboom, MJ Thrippleton, ME Bastin… - NeuroImage: Clinical, 2022 - Elsevier
Introduction Quantitative microstructural MRI, such as myelin-sensitive magnetisation
transfer ratio (MTR) or saturation (MTsat), axon-sensitive water diffusion Neurite Orientation …

High field MRI correlates of myelin content and axonal density in multiple sclerosis: a post-mortem study of the spinal cord

JP Mottershead, K Schmierer, M Clemence… - Journal of …, 2003 - Springer
Different MRI techniques are used to investigate multiple sclerosis (MS) in vivo. The
pathological specificity of these techniques is poorly understood, in particular their …

White matter abnormalities in multiple sclerosis evaluated by quantitative synthetic MRI, diffusion tensor imaging, and neurite orientation dispersion and density …

A Hagiwara, K Kamagata, K Shimoji… - American Journal …, 2019 - Am Soc Neuroradiology
BACKGROUND AND PURPOSE: A number of MR-derived quantitative metrics have been
suggested to assess the pathophysiology of MS, but the reports about combined analyses of …

Quantitative neuroimaging measures of myelin in the healthy brain and in multiple sclerosis

J O'Muircheartaigh, I Vavasour… - Human Brain …, 2019 - Wiley Online Library
Quantitative magnetic resonance imaging (MRI) techniques have been developed as
imaging biomarkers, aiming to improve the specificity of MRI to underlying pathology …