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Abstract #2341

Reconstruction of 3D EPI timeseries including a correction of different acquisition times

Samuel Bianchi1, Jakob Heinzle2, Maria Engel1, Lars Kasper1,2, and Klaas P. Pruessmann1
1Institute for Biomedical Engineering, ETH Zurich & University of Zurich, Zürich, Switzerland, 2Translational Neuromodeling Unit, University of Zurich & ETH Zurich, Zürich, Switzerland


Standard fMRI acquires volumes as stacks of slices with 2D sequences. Acquisition time differences within a volume can be corrected post hoc using a sinc interpolation in image space (“slice timing correction”). In 3D sequences, timing correction is not possible in image space. Here, we verify an approach that rests on a sinc interpolation of timeseries in k-space before image reconstruction. Particularly, we investigate the artifacts which get removed by timing correction and quantify effects on the power spectra of timeseries in image space for 3D EPI.

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