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Abstract #0864

Resting-State fMRI with 3 rd -Order Dynamic Shim Updating (DSU) and Dynamic F 0 Determination

Ariane Fillmer 1 , Milan Scheidegger 1,2 , Signe Johanna Vannesjo 1 , Matteo Pavan 1 , Klaas Paul Pruessmann 1 , and Anke Henning 1,3

1 Institute for Biomedical Engineering, University and ETH Zurich, Zurich, ZH, Switzerland, 2 Clinic of Affective Disorders and General Psychiatry, University Hospital of Psychiatry Zurich, Zurich, Switzerland, 3 Max Planck Institute for Biological Cybernetics, Tuebingen, Germany

EPI, the work horse of fMRI, is prone to artifacts, induced by B0 inhomogeneities. Therefore, sophisticated B0 shimming techniques are required. A promising, but technically demanding approach for B0 shimming is dynamic shim updating (DSU). The application of DSU to fMRI is, however, only feasible, if an accurate pre-emphasis calibration for eddy current correction (ECC) is implemented. This work presents the first report of resting-state fMRI data, acquired with a 3rd-order dynamically updated B0 shim along with a dynamic F0 determination.

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