Abstract #0923
Quantitative Susceptibility Mapping (QSM) at 7 Tesla:Correction of Induced Field Fluctuations with Real-Time Feedback Field Control
PINAR SENAY ZBAY 1,2 , Yolanda Drst 2 , Klaas Paul Prssmann 2 , and Daniel Nanz 1
1
Department of Radiology, University Hospital
Zrich, Zrich, Switzerland,
2
Institute
of Biomedical Engineering, ETH Zrich, Zrich,
Switzerland
Field fluctuations due to breathing and limb motions can
create artifacts, which might become severe at very high
field. This study investigated to what degree the use of
real-time high-order feedback-field control (FFC) with
NMR-field-probes can avoid generation of artifacts that
were deliberately attempted to be generated in
quantitative susceptibility maps (QSM) by 1) deep
breathing, and 2) arm movement, each case with and
without FFC. Image quality in FFC scans was clearly
improved with a better visualization of fine structures,
reduced ghosting artifacts and correction of larger
areas with unlikely alteration of susceptibility as
compared with the standard scans.
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