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Abstract #2882

Improved Parallel Imaging with GRAPPA with Large Virtual Coils Arrays for Time-Resolved Applications

Simon Bauer1, Bernd Andre Jung1, Alexey A. Samsonov2, Matthias Honal1, Michael Markl1

1Department of Radiology, Medical Physics, University Medical Center Freiburg, Freiburg, Germany; 2Department of Radiology, University of Wisconsin, Madison, WI, United States

Parallel imaging is based on the measurement of the MR signal with multiple receiver coils, where each coil modulates the signal with its sensitivity profile. The motion of an object can also be seen as a modulation of the object. Therefore, a time resolved measurement of a moving object can be considered as an acquisition with multiple (virtual) receiver coils along the temporal dimension. In this work we used a phantom and an in-vivo measurement to compare GRAPPA to a parallel imaging reconstruction which uses a combined virtual coil array consisting of the coil array and all time frames.