Abstract #1639
Impact of gradient-induced eddy currents on multi-shot EPI-based temperature map accuracy in a transcranial MR guided focused ultrasound applicator
Silke M. Lechner-Greite 1 , Nicolas Hehn 1 , Beat Werner 2 , Eyal Zadicario 3 , Matthew Tarasek 4 , and Desmond T.B. Yeo 4
1
Diagnostics, Imaging and Biomedical
Technologies Laboratory, GE Global Research Europe,
Garching n. Munich, Germany,
2
Center
for MR-Research, Childrens Hospital Zurich, Zurich,
Switzerland,
3
InSightec
Ltd., Tirat Carmel, Israel,
4
Diagnostics,
Imaging and Biomedical Technologies Laboratory, GE
Global Research Niskayuna, Albany, NY, United States
To minimize image artifacts caused by gradient-induced
eddy currents in a transducer electrode ground plane of
a transcranial MR guided focused ultrasound applicator
during multi-shot echo-planar imaging for fast
multi-plane temperature tracking. With this study we
demonstrate that segmentation of the transducer ground
plane by horizontal and vertical disruption would enable
fast multi-plane EPI imaging for accurate MR thermometry
in tcMRgFUS with geometric distortions comparable to a
scenario where no copper ground plane is present, i.e.
in the absence of the FUS transducer.
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