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Abstract #4561

Extending GRAPPA Kernels to 4D: Application on Time-Resolved 3D Phase Contrast Imaging

Bernd Andr Jung1, Simon Bauer1, Michael Markl1

1Dept. of Diagnostic Radiology, Medical Physics, University Hospital, Freiburg, Germany

Improved scanner performance and recent methodological development enable multi-dimensional data acquisition such as time-resolved 3D phase contrast imaging with three-directional velocity encoding. To speed up acquisition times for 3D data acquisition, parallel imaging techniques have been introduced. For time-resolved imaging, parallel imaging techniques have been developed such as kt-SENSE and kt-BLAST, kt-GRAPPA, and PEAK-GRAPPA as an extension of kt-GRAPPA. Previous applications of these methods focused on time-resolved 2D imaging. The aim of this work was to extend spatio-temporal PEAK-GRAPPA acceleration to reconstruction for time-resolved 3D phase contrast data acquisition to fully exploit data redundancy along all spatial and temporal directions.