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Abstract #1506

Temporally improved volume registration by data driven subvolume interpolation of simultaneous multislice EPI time series

Oscar Albert Dabrowski1, Oscar Albert Dabrowski1, Sébastien Courvoisier2, Jean-Luc Falcone3, Antoine Klauser2, Julien Songeon3, Michel Kocher2, Bastien Chopard3, and Francois Lazeyras2
1Computer science, University of Geneva, Geneva, Switzerland, 2CIBM, Geneva, Switzerland, 3University of Geneva, Geneva, Switzerland


In the context of EPI time series acquisition, fast motion occurring below the Nyquist limit (< 1 TR), present a problem for accurate registration by 3D rigid-body algorithms. A method for temporally upsampling SMS EPI acquisitions is proposed. EPI volumes are splitted into subvolumes according to the temporal acquisition order of SMS and interpolated using a data driven approach based on pairwise affine transforms and linear interpolation. A proof of concept based EPI acquisitions of controlled head choreographies shows that fast motion below the Nyquist rate can be more accurately estimated by our method.

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