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Abstract #2875

Characterization of high performance human gradient system for spin echo cardiac DTI

Konrad Schieban 1 , Timothy G Reese 2 , Christian T Stoeck 1 , David E Sosnovik 2 , Sebastian Kozerke 1,3 , and Choukri Mekkaoui 2

1 Institute for Biomedical Engineering, ETH Zurich, Zurich, Switzerland, 2 Radiology, Harvard Medical School, Massachusetts General Hospital, Martinos Center for Biomedical Imaging, Charlestown, MA, United States, 3 Division of Imaging Sciences, King's College London, London, United Kingdom

Large gradient amplitudes in cardiac spin echo DTI are desirable, since they allow gradient pulses to be short while still providing appropriate diffusion sensitivity. However, it is unclear if the benefit of motion robustness is offset by larger eddy currents which are increasingly influential at high field strengths. In this work, the impact of motion on the diffusion tensor is analyzed at 80mT/m and 150mT/m and compared with the impact of eddy currents which have been measured on the Siemens MAGNETOM Skyra CONNECTOM. Furthermore, geometric distortions due to eddy currents are demonstrated in phantom experiments.

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