Motion artefact correction in quantitative MRI (qMRI) by linear relaxometry modelling
Martina F. Callaghan 1 , Siawoosh Mohammadi 1 , and Nikolaus Weiskopf 1
Wellcome Trust Centre for Neuroimaging, UCL
Institute of Neurology, London, United Kingdom
Quantitative MRI (qMRI) with high resolution and whole
brain coverage is sensitive to motion artefacts because
of typically long acquisition times. We used a
multi-parameter mapping (MPM) protocol to acquire
quantitative maps of longitudinal relaxation rate (R1),
magnetisation transfer (MT) and effective transverse
relaxation rate (R2*). These quantitative maps were
combined in a linear relaxometry model to reduce motion
artefacts by exploiting the inconsistent manifestation
of the artefacts across the maps.
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