Abstract #1608
Retrospective Motion Correction of T2* Maps Improves Interpretability of Brain Pathologies
Ulrike Nth 1 , Steffen Volz 1 , Elke Hattingen 2 , and Ralf Deichmann 1
1
Brain Imaging Center (BIC), Goethe
University Frankfurt/Main, Frankfurt/Main, Germany,
2
Institute
of Neuroradiology, University Hospital Frankfurt/Main,
Frankfurt/Main, Germany
A method for reducing motion artefacts in quantitative
T2* maps is presented, based on repeated acquisitions
with reduced spatial resolution. Raw data are averaged
with weighting factors individually chosen for each
k-space line, so the influence of corrupted lines is
strongly reduced. A study performed on healthy subjects
performing pre-trained motion shows that corrupted lines
are reliably detected and suppressed. In a study on
tumour patients, pathological details visible in a
T2-weighted reference image are replicated in the motion
corrected T2* map, whereas the uncorrected T2* map
yields artefacts that can easily be misinterpreted as
additional lesions.
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