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Abstract #3353

Eddy current artifact reduction in diffusion-weighted single-refocused spin-echo EPI

Manoj Shrestha1, Pavel Hok2, Ulrike Nöth1, and Ralf Deichmann1

1Brain Imaging Center (BIC), Goethe University Frankfurt, Frankfurt am Main, Germany, 2Palacky University Olomouc, University Hospital Olomouc, Czech Republic

Diffusion-weighted (DW) MRI with single-refocused spin-echo preparation suffers from eddy-current induced image distortions. In this study, a method for substantial reduction of eddy-current artifacts is proposed. Dummy scans comprising DW gradients prior to the acquisition of each multi-slice data volume yield a steady state of eddy-currents and thus comparable distortions across the volume which subsequently can be corrected via an advanced setting of the eddy-current correction FMRIB software library tool. In comparison to the commonly used twice-refocused spin-echo sequence for eddy-current compensation, the proposed method is less sensitive to radiofrequency inhomogeneities and offers higher signal-to-noise ratio due to shorter echo-time.

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