Abstract #0929
Feedback field control improves the accuracy of T 2 * mapping at 7T
Michael Wyss 1 , Yolanda Duerst 1 , Bertram Wilm 1 , David Brunner 1 , Benjamin Dietrich 1 , Thomas Schmid 1 , Christoph Barmet 1,2 , and Klaas Pruessmann 1
1
Institute for Biomedical Engineering,
University of Zurich and ETH, Zurich, Zurich,
Switzerland,
2
Skope
Magnetic Resonance Technologies, Zurich, Switzerland
At high field strength T2* weighted imaging suffers from
artifacts due to field fluctuations generated by patient
breathing and motion. We propose to employ a real-time
higher order field feedback system based on NMR field
sensors providing full 3rd order real-time field
compensation. In this work the effectiveness of the
system is quantified for T2* mapping. Field feedback was
demonstrated to improve data accuracy of T2* mapping at
7T, which was evaluated in phantom experiments and
in-vivo. The method may as well be beneficial to improve
image quality and data accuracy in susceptibility
weighted imaging and quantitative susceptibility
mapping.
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