Abstract #1416
Clinical relevance of EPI distortion correction in presurgical fMRI at 7T
Barbara Dymerska 1 , Florian Fischmeister 1,2 , Alexander Geissler 1,2 , Eva Matt 1,2 , Siegfried Trattnig 1 , Roland Beisteiner 1,2 , and Simon Robinson 1
1
Departement of Biomedical Imaging and
Image-guided Therapy, Medical University of Vienna,
Vienna, Vienna, Austria,
2
Department
of Neurology, Medical University of Vienna, Vienna,
Vienna, Austria
FMRI is increasingly being applied in presurgical
planning. Although ultra-high field provides higher tSNR
it also induces stronger geometric distortions. We
investigate the clinical relevance of distortion
correction using B0 field maps. Analysis of eight
patients performing hand and chin tasks at 7T revealed
that neglecting geometric distortions could lead to the
misidentification of the central sulcus. Moreover, the
distance between the pathology and activation could be
wrongly estimated, which could affect decisions about
resection margins. It is therefore important to correct
for distortions in patient fMRI data to ensure that
reliable clinical decisions are made.
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